Vulnerability-Lookup

CVE-2026-24858 (GCVE-0-2026-24858)

Vulnerability from cvelistv5 – Published: 2026-01-27 19:18 – Updated: 2026-01-29 09:36

CISA KEV

Summary

An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] vulnerability in Fortinet FortiAnalyzer 7.6.0 through 7.6.5, FortiAnalyzer 7.4.0 through 7.4.9, FortiAnalyzer 7.2.0 through 7.2.11, FortiAnalyzer 7.0.0 through 7.0.15, FortiManager 7.6.0 through 7.6.5, FortiManager 7.4.0 through 7.4.9, FortiManager 7.2.0 through 7.2.11, FortiManager 7.0.0 through 7.0.15, FortiOS 7.6.0 through 7.6.5, FortiOS 7.4.0 through 7.4.10, FortiOS 7.2.0 through 7.2.12, FortiOS 7.0.0 through 7.0.18, FortiProxy 7.6.0 through 7.6.4, FortiProxy 7.4.0 through 7.4.12, FortiProxy 7.2.0 through 7.2.15, FortiProxy 7.0.0 through 7.0.22, FortiWeb 8.0.0 through 8.0.3, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.0 through 7.4.11 may allow an attacker with a FortiCloud account and a registered device to log into other devices registered to other accounts, if FortiCloud SSO authentication is enabled on those devices.

Severity ?

9.4 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C

CWE

CWE-288 - Improper access control

Assigner

fortinet

References

URL

CISA KEV

Known Exploited Vulnerability - GCVE BCP-07 Compliant

KEV entry ID: e1546c5c-ee29-412d-8453-540ce5e9e017

Vulnerability ID: CVE-2026-24858

Status: Confirmed

Status Updated: 2026-01-27 00:00 UTC

Exploited: Yes

Timestamps

First Seen: 2026-01-27

Asserted: 2026-01-27

Scope

Notes: KEV entry: Fortinet Multiple Products Authentication Bypass Using an Alternate Path or Channel Vulnerability | Affected: Fortinet / Multiple Products | Description: Fortinet FortiAnalyzer, FortiManager, FortiOS, and FortiProxy contain an authentication bypass using an alternate path or channel that could allow an attacker with a FortiCloud account and a registered device to log into other devices registered to other accounts, if FortiCloud SSO authentication is enabled on those devices. | Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. | Due date: 2026-01-30 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): Please adhere to Fortinet's guidelines to assess exposure and mitigate risks. Check for signs of potential compromise on all internet accessible Fortinet products affected by this vulnerability. Apply any final mitigations provided by the vendor as soon as they become available. For more information please see: https://fortiguard.fortinet.com/psirt/FG-IR-26-060 ; https://www.fortinet.com/blog/psirt-blogs/analysis-of-sso-abuse-on-fortios ; https://nvd.nist.gov/vuln/detail/CVE-2026-24858

Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details

Cwes	CWE-288
Feed	CISA Known Exploited Vulnerabilities Catalog
Product	Multiple Products
Due Date	2026-01-30
Date Added	2026-01-27
Vendorproject	Fortinet
Vulnerabilityname	Fortinet Multiple Products Authentication Bypass Using an Alternate Path or Channel Vulnerability
Knownransomwarecampaignuse	Unknown

References

CVE-2026-24858

Created: 2026-02-02 12:25 UTC | Updated: 2026-02-02 12:25 UTC

Show details on NVD website

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        {
          "lang": "en",
          "value": "An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] vulnerability in Fortinet FortiAnalyzer 7.6.0 through 7.6.5, FortiAnalyzer 7.4.0 through 7.4.9, FortiAnalyzer 7.2.0 through 7.2.11, FortiAnalyzer 7.0.0 through 7.0.15, FortiManager 7.6.0 through 7.6.5, FortiManager 7.4.0 through 7.4.9, FortiManager 7.2.0 through 7.2.11, FortiManager 7.0.0 through 7.0.15, FortiOS 7.6.0 through 7.6.5, FortiOS 7.4.0 through 7.4.10, FortiOS 7.2.0 through 7.2.12, FortiOS 7.0.0 through 7.0.18, FortiProxy 7.6.0 through 7.6.4, FortiProxy 7.4.0 through 7.4.12, FortiProxy 7.2.0 through 7.2.15, FortiProxy 7.0.0 through 7.0.22, FortiWeb 8.0.0 through 8.0.3, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.0 through 7.4.11 may allow an attacker with a FortiCloud account and a registered device to log into other devices registered to other accounts, if FortiCloud SSO authentication is enabled on those devices."
        }
      ],
      "metrics": [
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          "cvssV3_1": {
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            "baseScore": 9.4,
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            "confidentialityImpact": "HIGH",
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        "orgId": "6abe59d8-c742-4dff-8ce8-9b0ca1073da8",
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      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to upcoming  FortiProxy version 7.6.6 or above\nUpgrade to upcoming  FortiProxy version 7.4.13 or above\nUpgrade to upcoming  FortiProxy version 7.2.16 or above\nUpgrade to upcoming  FortiProxy version 7.0.23 or above\nUpgrade to upcoming  FortiWeb version 8.0.4 or above\nUpgrade to upcoming  FortiWeb version 7.6.7 or above\nUpgrade to upcoming  FortiWeb version 7.4.12 or above\nUpgrade to FortiAnalyzer version 7.6.6 or above\nUpgrade to FortiAnalyzer version 7.4.10 or above\nUpgrade to upcoming  FortiAnalyzer version 7.2.12 or above\nUpgrade to upcoming  FortiAnalyzer version 7.0.16 or above\nUpgrade to upcoming  FortiSwitchManager version 7.2.9 or above\nUpgrade to upcoming  FortiSwitchManager version 7.0.8 or above\nUpgrade to upcoming  FortiOS version 8.0.0 or above\nUpgrade to FortiOS version 7.6.6 or above\nUpgrade to FortiOS version 7.4.11 or above\nUpgrade to upcoming  FortiOS version 7.2.13 or above\nUpgrade to upcoming  FortiOS version 7.0.19 or above\nUpgrade to upcoming  FortiManager version 8.0.0 or above\nUpgrade to FortiManager version 7.6.6 or above\nUpgrade to FortiManager version 7.4.10 or above\nUpgrade to upcoming  FortiManager version 7.2.12 or above\nUpgrade to upcoming  FortiManager version 7.0.16 or above"
        }
      ]
    }
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    "assignerOrgId": "6abe59d8-c742-4dff-8ce8-9b0ca1073da8",
    "assignerShortName": "fortinet",
    "cveId": "CVE-2026-24858",
    "datePublished": "2026-01-27T19:18:23.591Z",
    "dateReserved": "2026-01-27T15:11:02.057Z",
    "dateUpdated": "2026-01-29T09:36:15.433Z",
    "state": "PUBLISHED"
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "dateAdded": "2026-01-27",
      "dueDate": "2026-01-30",
      "knownRansomwareCampaignUse": "Unknown",
      "notes": "Please adhere to Fortinet\u0027s guidelines to assess exposure and mitigate risks. Check for signs of potential compromise on all internet accessible Fortinet products affected by this vulnerability. Apply any final mitigations provided by the vendor as soon as they become available. For more information please see: https://fortiguard.fortinet.com/psirt/FG-IR-26-060 ; https://www.fortinet.com/blog/psirt-blogs/analysis-of-sso-abuse-on-fortios ; https://nvd.nist.gov/vuln/detail/CVE-2026-24858",
      "product": "Multiple Products",
      "requiredAction": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.",
      "shortDescription": "Fortinet FortiAnalyzer, FortiManager, FortiOS, and FortiProxy contain an authentication bypass using an alternate path or channel that could allow an attacker with a FortiCloud account and a registered device to log into other devices registered to other accounts, if FortiCloud SSO authentication is enabled on those devices.",
      "vendorProject": "Fortinet",
      "vulnerabilityName": "Fortinet Multiple Products Authentication Bypass Using an Alternate Path or Channel Vulnerability"
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\"semver\", \"lessThanOrEqual\": \"7.4.9\"}, {\"status\": \"affected\", \"version\": \"7.2.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.2.11\"}, {\"status\": \"affected\", \"version\": \"7.0.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.0.15\"}], \"defaultStatus\": \"unaffected\"}], \"solutions\": [{\"lang\": \"en\", \"value\": \"Upgrade to upcoming  FortiProxy version 7.6.6 or above\\nUpgrade to upcoming  FortiProxy version 7.4.13 or above\\nUpgrade to upcoming  FortiProxy version 7.2.16 or above\\nUpgrade to upcoming  FortiProxy version 7.0.23 or above\\nUpgrade to upcoming  FortiWeb version 8.0.4 or above\\nUpgrade to upcoming  FortiWeb version 7.6.7 or above\\nUpgrade to upcoming  FortiWeb version 7.4.12 or above\\nUpgrade to FortiAnalyzer version 7.6.6 or above\\nUpgrade to FortiAnalyzer version 7.4.10 or above\\nUpgrade to upcoming  FortiAnalyzer version 7.2.12 or above\\nUpgrade to upcoming  FortiAnalyzer version 7.0.16 or above\\nUpgrade to upcoming  FortiSwitchManager version 7.2.9 or above\\nUpgrade to upcoming  FortiSwitchManager version 7.0.8 or above\\nUpgrade to upcoming  FortiOS version 8.0.0 or above\\nUpgrade to FortiOS version 7.6.6 or above\\nUpgrade to FortiOS version 7.4.11 or above\\nUpgrade to upcoming  FortiOS version 7.2.13 or above\\nUpgrade to upcoming  FortiOS version 7.0.19 or above\\nUpgrade to upcoming  FortiManager version 8.0.0 or above\\nUpgrade to FortiManager version 7.6.6 or above\\nUpgrade to FortiManager version 7.4.10 or above\\nUpgrade to upcoming  FortiManager version 7.2.12 or above\\nUpgrade to upcoming  FortiManager version 7.0.16 or above\"}], \"references\": [{\"url\": \"https://fortiguard.fortinet.com/psirt/FG-IR-26-060\", \"name\": \"https://fortiguard.fortinet.com/psirt/FG-IR-26-060\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] vulnerability in Fortinet FortiAnalyzer 7.6.0 through 7.6.5, FortiAnalyzer 7.4.0 through 7.4.9, FortiAnalyzer 7.2.0 through 7.2.11, FortiAnalyzer 7.0.0 through 7.0.15, FortiManager 7.6.0 through 7.6.5, FortiManager 7.4.0 through 7.4.9, FortiManager 7.2.0 through 7.2.11, FortiManager 7.0.0 through 7.0.15, FortiOS 7.6.0 through 7.6.5, FortiOS 7.4.0 through 7.4.10, FortiOS 7.2.0 through 7.2.12, FortiOS 7.0.0 through 7.0.18, FortiProxy 7.6.0 through 7.6.4, FortiProxy 7.4.0 through 7.4.12, FortiProxy 7.2.0 through 7.2.15, FortiProxy 7.0.0 through 7.0.22, FortiWeb 8.0.0 through 8.0.3, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.0 through 7.4.11 may allow an attacker with a FortiCloud account and a registered device to log into other devices registered to other accounts, if FortiCloud SSO authentication is enabled on those devices.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-288\", \"description\": \"Improper access control\"}]}], \"providerMetadata\": {\"orgId\": \"6abe59d8-c742-4dff-8ce8-9b0ca1073da8\", \"shortName\": \"fortinet\", \"dateUpdated\": \"2026-01-29T09:36:15.433Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-24858\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-29T09:36:15.433Z\", \"dateReserved\": \"2026-01-27T15:11:02.057Z\", \"assignerOrgId\": \"6abe59d8-c742-4dff-8ce8-9b0ca1073da8\", \"datePublished\": \"2026-01-27T19:18:23.591Z\", \"assignerShortName\": \"fortinet\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

FKIE_CVE-2026-24858

Vulnerability from fkie_nvd - Published: 2026-01-27 20:16 - Updated: 2026-01-29 13:16

CISA KEV

Severity ?

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

References

URL	Tags
psirt@fortinet.com	https://fortiguard.fortinet.com/psirt/FG-IR-26-060	Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-24858	US Government Resource
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://www.fortinet.com/blog/psirt-blogs/analysis-of-sso-abuse-on-fortios	Mitigation, Vendor Advisory

Impacted products

Vendor	Product	Version
fortinet	fortianalyzer	*
fortinet	fortianalyzer	*
fortinet	fortianalyzer	*
fortinet	fortianalyzer	*
fortinet	fortimanager	*
fortinet	fortimanager	*
fortinet	fortimanager	*
fortinet	fortimanager	*
fortinet	fortiproxy	*
fortinet	fortiproxy	*
fortinet	fortiproxy	*
fortinet	fortiproxy	*
fortinet	fortiweb	*
fortinet	fortiweb	*
fortinet	fortiweb	*
fortinet	fortios	*
fortinet	fortios	*
fortinet	fortios	*
fortinet	fortios	*

JSON

To clipboard

{
  "cisaActionDue": "2026-01-30",
  "cisaExploitAdd": "2026-01-27",
  "cisaRequiredAction": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.",
  "cisaVulnerabilityName": "Fortinet Multiple Products Authentication Bypass Using an Alternate Path or Channel Vulnerability",
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:fortinet:fortianalyzer:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F2B61F1F-19A9-4BA6-B12A-ECA95C5634A3",
              "versionEndIncluding": "7.0.15",
              "versionStartIncluding": "7.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fortinet:fortianalyzer:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "D467D1D8-1BCF-4A88-8EEE-0D8092C3AE9C",
              "versionEndIncluding": "7.2.11",
              "versionStartIncluding": "7.2.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fortinet:fortianalyzer:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "BD96750D-104E-4DAE-A19E-8C92E85429F4",
              "versionEndExcluding": "7.4.10",
              "versionStartIncluding": "7.4.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fortinet:fortianalyzer:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "BDF7BF56-B998-4AAE-9B6D-C6F009F8B807",
              "versionEndExcluding": "7.6.6",
              "versionStartIncluding": "7.6.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fortinet:fortimanager:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "651E452B-3C1D-4738-BDFF-7234B19C63F7",
              "versionEndIncluding": "7.0.15",
              "versionStartIncluding": "7.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fortinet:fortimanager:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "36D9D75F-B292-4651-8BF0-20AFE2C016C4",
              "versionEndIncluding": "7.2.11",
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              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fortinet:fortimanager:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "3AF70FA9-34D3-4ADF-B87C-A9C31D4DC174",
              "versionEndExcluding": "7.4.10",
              "versionStartIncluding": "7.4.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fortinet:fortimanager:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "357DA889-E7C0-42B6-96A5-83C0D9E6CC69",
              "versionEndExcluding": "7.6.6",
              "versionStartIncluding": "7.6.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "63D22275-D430-4F99-9170-C8378FF80242",
              "versionEndIncluding": "7.0.22",
              "versionStartIncluding": "7.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "33FE9C6F-F5A1-43E4-917E-32497D6CC5A6",
              "versionEndIncluding": "7.2.15",
              "versionStartIncluding": "7.2.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "DA34D10C-0B80-4A37-94D2-CD05E865E149",
              "versionEndIncluding": "7.4.12",
              "versionStartIncluding": "7.4.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*",
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              "versionEndIncluding": "7.6.4",
              "versionStartIncluding": "7.6.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "64C16483-DF84-43AA-B5D4-FA8939E4F387",
              "versionEndIncluding": "7.4.11",
              "versionStartIncluding": "7.4.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "B40750AD-AE67-42C3-89A5-E64F3D7F0431",
              "versionEndIncluding": "7.6.6",
              "versionStartIncluding": "7.6.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "EDCDD451-D984-4EC9-AB30-42D553FF0BD7",
              "versionEndIncluding": "8.0.3",
              "versionStartIncluding": "8.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "6A0CDFB7-0B78-4B3E-9E19-34E5F2479271",
              "versionEndIncluding": "7.0.18",
              "versionStartIncluding": "7.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "25DF0315-DF9C-4C51-9902-ED607B049152",
              "versionEndIncluding": "7.2.12",
              "versionStartIncluding": "7.2.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "2ADAF67E-132B-4810-8919-38AC80BF59F5",
              "versionEndExcluding": "7.4.11",
              "versionStartIncluding": "7.4.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "96C45B06-625A-4EFE-A720-242E33611B50",
              "versionEndExcluding": "7.6.6",
              "versionStartIncluding": "7.6.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] vulnerability in Fortinet FortiAnalyzer 7.6.0 through 7.6.5, FortiAnalyzer 7.4.0 through 7.4.9, FortiAnalyzer 7.2.0 through 7.2.11, FortiAnalyzer 7.0.0 through 7.0.15, FortiManager 7.6.0 through 7.6.5, FortiManager 7.4.0 through 7.4.9, FortiManager 7.2.0 through 7.2.11, FortiManager 7.0.0 through 7.0.15, FortiOS 7.6.0 through 7.6.5, FortiOS 7.4.0 through 7.4.10, FortiOS 7.2.0 through 7.2.12, FortiOS 7.0.0 through 7.0.18, FortiProxy 7.6.0 through 7.6.4, FortiProxy 7.4.0 through 7.4.12, FortiProxy 7.2.0 through 7.2.15, FortiProxy 7.0.0 through 7.0.22, FortiWeb 8.0.0 through 8.0.3, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.0 through 7.4.11 may allow an attacker with a FortiCloud account and a registered device to log into other devices registered to other accounts, if FortiCloud SSO authentication is enabled on those devices."
    }
  ],
  "id": "CVE-2026-24858",
  "lastModified": "2026-01-29T13:16:51.047",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "psirt@fortinet.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-01-27T20:16:24.477",
  "references": [
    {
      "source": "psirt@fortinet.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-060"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "US Government Resource"
      ],
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-24858"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://www.fortinet.com/blog/psirt-blogs/analysis-of-sso-abuse-on-fortios"
    }
  ],
  "sourceIdentifier": "psirt@fortinet.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-288"
        }
      ],
      "source": "psirt@fortinet.com",
      "type": "Secondary"
    }
  ]
}

CERTFR-2026-AVI-0097

Vulnerability from certfr_avis - Published: 2026-01-28 - Updated: 2026-01-28

Une vulnérabilité a été découverte dans les produits Fortinet. Elle permet à un attaquant de provoquer un contournement de la politique de sécurité.

Fortinet indique que la vulnérabilité CVE-2026-24858 est activement exploitée.

Solutions

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

L'éditeur indique avoir désactivé l'authentification avec FortiCloud SSO pour les versions vulnérables. Des indicateurs de compromission sont disponibles dans l'avis éditeur.

Impacted products

Vendor	Product	Description
Fortinet	FortiManager	FortiManager versions 7.6.x antérieures à 7.6.6 (à venir)
Fortinet	FortiManager	FortiManager versions 7.0.x antérieures à 7.0.16 (à venir)
Fortinet	FortiAnalyzer	FortiAnalyzer versions 7.4.x antérieures à 7.4.10
Fortinet	FortiProxy	FortiProxy versions 7.6.x antérieures à 7.6.6 (à venir)
Fortinet	FortiOS	FortiOS versions 7.4.x antérieures à 7.4.11
Fortinet	FortiManager	FortiManager versions 7.4.x antérieures à 7.4.10
Fortinet	FortiAnalyzer	FortiAnalyzer versions 7.6.x antérieures à 7.6.6 (à venir)
Fortinet	FortiProxy	FortiProxy versions antérieures à 7.4.13 (à venir)
Fortinet	FortiAnalyzer	FortiAnalyzer versions 7.2.x antérieures à 7.2.12 (à venir)
Fortinet	FortiOS	FortiOS versions 7.6.x antérieures à 7.6.6 (à venir)
Fortinet	FortiAnalyzer	FortiAnalyzer versions 7.0.x antérieures à 7.0.16 (à venir)
Fortinet	FortiOS	FortiOS versions 7.0.x antérieures à 7.0.19 (à venir)
Fortinet	FortiOS	FortiOS versions 7.2.x antérieures à 7.2.13 (à venir)
Fortinet	FortiManager	FortiManager versions 7.2.x antérieures à 7.2.13 (à venir)

References

Title

Publication Time

NCSC-2026-0041

Vulnerability from csaf_ncscnl - Published: 2026-01-28 09:32 - Updated: 2026-01-28 09:32

Summary

Kwetsbaarheid verholpen in Fortinet producten

Notes

The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions: NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein. NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory. This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings.

Feiten

Fortinet heeft een kwetsbaarheid verholpen in FortiAnalyzer, FortiManager, FortiOS en FortiProxy producten.

Interpretaties

De kwetsbaarheid bevindt zich in specifieke implementaties van FortiCloud SSO-authenticatie. De kwetsbaarheid stelt aanvallers met een geregistreerd apparaat en een FortiCloud-account in staat om de authenticatie te omzeilen en toegang te krijgen tot andere geregistreerde apparaten wanneer FortiCloud SSO-authenticatie is ingeschakeld. Fortinet heeft aangegeven dat er actief misbruik van de kwetsbaarheid is waargenomen. Fortinet heeft in hun advisory ook indicators-of-compromise (IoC's) beschikbaar gesteld om misbruik van de kwetsbaarheid te onderkennen. Het NCSC adviseert partijen die gebruikmaken van de kwetsbare implementaties om ook middels deze IoC’s terug te kijken in de logging.

Oplossingen

Fortinet heeft updates uitgebracht om de kwetsbaarheden te verhelpen. Zie bijgevoegde referenties voor meer informatie.

Kans

high

Schade

high

CWE-288

Authentication Bypass Using an Alternate Path or Channel

JSON

To clipboard

{
  "document": {
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE"
      }
    },
    "lang": "nl",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions:\n\n    NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein.\n\n    NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory.\n    This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings."
      },
      {
        "category": "description",
        "text": "Fortinet heeft een kwetsbaarheid verholpen in FortiAnalyzer, FortiManager, FortiOS en FortiProxy producten.",
        "title": "Feiten"
      },
      {
        "category": "description",
        "text": "De kwetsbaarheid bevindt zich in specifieke implementaties van FortiCloud SSO-authenticatie. De kwetsbaarheid stelt aanvallers met een geregistreerd apparaat en een FortiCloud-account in staat om de authenticatie te omzeilen en toegang te krijgen tot andere geregistreerde apparaten wanneer FortiCloud SSO-authenticatie is ingeschakeld. \n\nFortinet heeft aangegeven dat er actief misbruik van de kwetsbaarheid is waargenomen. Fortinet heeft in hun advisory ook indicators-of-compromise (IoC\u0027s) beschikbaar gesteld om misbruik van de kwetsbaarheid te onderkennen. Het NCSC adviseert partijen die gebruikmaken van de kwetsbare implementaties om ook middels deze IoC\u2019s terug te kijken in de logging.",
        "title": "Interpretaties"
      },
      {
        "category": "description",
        "text": "Fortinet heeft updates uitgebracht om de kwetsbaarheden te verhelpen. Zie bijgevoegde referenties voor meer informatie.",
        "title": "Oplossingen"
      },
      {
        "category": "general",
        "text": "high",
        "title": "Kans"
      },
      {
        "category": "general",
        "text": "high",
        "title": "Schade"
      },
      {
        "category": "general",
        "text": "Authentication Bypass Using an Alternate Path or Channel",
        "title": "CWE-288"
      }
    ],
    "publisher": {
      "category": "coordinator",
      "contact_details": "cert@ncsc.nl",
      "name": "Nationaal Cyber Security Centrum",
      "namespace": "https://www.ncsc.nl/"
    },
    "references": [
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://www.fortiguard.com/psirt/FG-IR-26-060"
      },
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://www.fortinet.com/blog/psirt-blogs/analysis-of-sso-abuse-on-fortios"
      }
    ],
    "title": "Kwetsbaarheid verholpen in Fortinet producten",
    "tracking": {
      "current_release_date": "2026-01-28T09:32:41.752905Z",
      "generator": {
        "date": "2025-08-04T16:30:00Z",
        "engine": {
          "name": "V.A.",
          "version": "1.3"
        }
      },
      "id": "NCSC-2026-0041",
      "initial_release_date": "2026-01-28T09:32:41.752905Z",
      "revision_history": [
        {
          "date": "2026-01-28T09:32:41.752905Z",
          "number": "1.0.0",
          "summary": "Initiele versie"
        }
      ],
      "status": "final",
      "version": "1.0.0"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:unknown/*",
                "product": {
                  "name": "vers:unknown/*",
                  "product_id": "CSAFPID-1"
                }
              }
            ],
            "category": "product_name",
            "name": "FortiAnalyzer"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:unknown/*",
                "product": {
                  "name": "vers:unknown/*",
                  "product_id": "CSAFPID-2"
                }
              }
            ],
            "category": "product_name",
            "name": "FortiManager"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:unknown/*",
                "product": {
                  "name": "vers:unknown/*",
                  "product_id": "CSAFPID-3"
                }
              }
            ],
            "category": "product_name",
            "name": "FortiOS"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:unknown/*",
                "product": {
                  "name": "vers:unknown/*",
                  "product_id": "CSAFPID-4"
                }
              }
            ],
            "category": "product_name",
            "name": "FortiProxy"
          }
        ],
        "category": "vendor",
        "name": "Fortinet"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-24858",
      "cwe": {
        "id": "CWE-288",
        "name": "Authentication Bypass Using an Alternate Path or Channel"
      },
      "notes": [
        {
          "category": "other",
          "text": "Authentication Bypass Using an Alternate Path or Channel",
          "title": "CWE-288"
        },
        {
          "category": "description",
          "text": "A vulnerability in Fortinet\u0027s FortiAnalyzer, FortiManager, and FortiOS allows attackers with FortiCloud accounts to bypass authentication, leading to unauthorized access to registered devices when FortiCloud SSO is enabled.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-24858 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-24858.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4"
          ]
        }
      ],
      "title": "CVE-2026-24858"
    }
  ]
}

GHSA-2X38-48VP-W23X

Vulnerability from github – Published: 2026-01-27 21:31 – Updated: 2026-01-28 00:31

Details

An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] vulnerability in Fortinet FortiAnalyzer 7.6.0 through 7.6.5, FortiAnalyzer 7.4.0 through 7.4.9, FortiAnalyzer 7.2.0 through 7.2.11, FortiAnalyzer 7.0.0 through 7.0.15, FortiManager 7.6.0 through 7.6.5, FortiManager 7.4.0 through 7.4.9, FortiManager 7.2.0 through 7.2.11, FortiManager 7.0.0 through 7.0.15, FortiOS 7.6.0 through 7.6.5, FortiOS 7.4.0 through 7.4.10, FortiOS 7.2.0 through 7.2.12, FortiOS 7.0.0 through 7.0.18 may allow an attacker with a FortiCloud account and a registered device to log into other devices registered to other accounts, if FortiCloud SSO authentication is enabled on those devices.

Severity ?

9.8 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2026-24858"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-288"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-27T20:16:24Z",
    "severity": "CRITICAL"
  },
  "details": "An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] vulnerability in Fortinet FortiAnalyzer 7.6.0 through 7.6.5, FortiAnalyzer 7.4.0 through 7.4.9, FortiAnalyzer 7.2.0 through 7.2.11, FortiAnalyzer 7.0.0 through 7.0.15, FortiManager 7.6.0 through 7.6.5, FortiManager 7.4.0 through 7.4.9, FortiManager 7.2.0 through 7.2.11, FortiManager 7.0.0 through 7.0.15, FortiOS 7.6.0 through 7.6.5, FortiOS 7.4.0 through 7.4.10, FortiOS 7.2.0 through 7.2.12, FortiOS 7.0.0 through 7.0.18 may allow an attacker with a FortiCloud account and a registered device to log into other devices registered to other accounts, if FortiCloud SSO authentication is enabled on those devices.",
  "id": "GHSA-2x38-48vp-w23x",
  "modified": "2026-01-28T00:31:40Z",
  "published": "2026-01-27T21:31:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-24858"
    },
    {
      "type": "WEB",
      "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-060"
    },
    {
      "type": "WEB",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-24858"
    },
    {
      "type": "WEB",
      "url": "https://www.fortinet.com/blog/psirt-blogs/analysis-of-sso-abuse-on-fortios"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-24858 (GCVE-0-2026-24858)

CISA KEV

Known Exploited Vulnerability - GCVE BCP-07 Compliant

Timestamps

Scope

Evidence

Vendor Report Successful Exploitation Confidence: 80% Source: cisa-kev

Details

References

FKIE_CVE-2026-24858

CERTFR-2026-AVI-0097

Solutions

NCSC-2026-0041

GHSA-2X38-48VP-W23X

Tags

Sightings

Nomenclature