Vulnerability-Lookup

CVE-2026-3564 (GCVE-0-2026-3564)

Vulnerability from cvelistv5 – Published: 2026-03-17 14:48 – Updated: 2026-03-18 03:55

Title

ScreenConnect Instance Level Cryptographic Material Exposure

Summary

A condition in ScreenConnect may allow an actor with access to server-level cryptographic material used for authentication to obtain unauthorized access, including elevated privileges, in certain scenarios.

Severity ?

9 (Critical)


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

CWE

CWE-347 - Improper Verification of Cryptographic Signature

Assigner

ConnectWise

References

URL

Tags

https://www.connectwise.com/company/trust/securit…

Impacted products

	Vendor	Product	Version
	ConnectWise	ScreenConnect	Affected: All versions prior to 26.1

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-3564",
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ScreenConnect servers hosted in\\n\\u201cscreenconnect.com\\u201d cloud (standalone and Automate/RMM integrated) or\\n\\u201chostedrmm.com\\u201d for Automate partners have been updated to remediate the\\nissue.\\u202f\u0026nbsp;\u003c/p\u003e\\n\\n\u003cp\u003e\u003cb\u003eOn-premise\u003c/b\u003e\u0026nbsp;\u003cb\u003eScreenConnect\u003c/b\u003e \u003cb\u003ePartners:\u003c/b\u003e\u003c/p\u003e\\n\\n\\n\\n\u003cp\u003ePlease upgrade to ScreenConnect version 26.1. Visit \u003ca target=\\\"_blank\\\" rel=\\\"nofollow\\\" href=\\\"https://www.screenconnect.com/download\\\"\u003eDownload\\n| ScreenConnect\u003c/a\u003e page to download and apply the update \u003ci\u003e(access\\nrequires a valid on-premises license)\u003c/i\u003e.\u0026nbsp;\u003c/p\u003e\\n\\n\\n\\n\u003cp\u003e\u003c/p\u003e\u003cul\u003e\u003cli\u003eIf your license is out of maintenance, you must \u003ca target=\\\"_blank\\\" rel=\\\"nofollow\\\" href=\\\"https://docs.connectwise.com/ScreenConnect_Documentation/On-premises/On-premises_licensing/Renew_or_upgrade_an_on-premises_license\\\"\u003eupgrade your license\u003c/a\u003e\u0026nbsp;before installing\\nthe latest supported release of ScreenConnect. \u003c/li\u003e\u003cli\u003eFor\\ninstructions on updating to the newest release, please reference this\\ndoc: \u003ca target=\\\"_blank\\\" rel=\\\"nofollow\\\" href=\\\"https://docs.connectwise.com/ConnectWise_ScreenConnect_Documentation/On-premises/Get_started_with_ConnectWise_ScreenConnect_On-Premise/Upgrade_an_on-premises_installation\\\"\u003eUpgrade an on-premise\\ninstallation - ConnectWise\u003c/a\u003e\u0026nbsp;\u003c/li\u003e\u003c/ul\u003e\u003cp\u003e\u003c/p\u003e\\n\\n\\n\\n\\n\\n\\n\\n\u003cp\u003e\u003cb\u003eAutomate On-Prem Partners with ScreenConnect\\nIntegration\u003c/b\u003e:\u003c/p\u003e\\n\\n\u003cp\u003eFor partners using an on-premises ScreenConnect\\ninstallation integrated with Automate, ScreenConnect 26.1 is available through\\nthe \u003ca href=\\\"https://docs.connectwise.com/ConnectWise_Automate_Documentation/Automate_Product_Updates\\\"\u003eAutomate Product Updates\u003c/a\u003e page.\u003c/p\u003e\u003cp\u003e\u003cbr\u003e\u003c/p\u003e\\n\\n\u003cp\u003eLink to release\\nnotes: \u003ca href=\\\"https://screenconnect.product.connectwise.com/communities/26/topics/5088-screenconnect-261\\\"\u003eScreenConnect 26.1 / ScreenConnect\u003c/a\u003e\u003c/p\u003e\", \"base64\": false}]}], \"references\": [{\"url\": \"https://www.connectwise.com/company/trust/security-bulletins/2026-03-17-screenconnect-bulletin\"}], \"x_generator\": {\"engine\": \"Vulnogram 0.5.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"A condition in ScreenConnect may allow an actor with access to server-level cryptographic material used for authentication to obtain unauthorized access, including elevated privileges, in certain scenarios.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"A condition in ScreenConnect may allow an actor with access to server-level cryptographic material used for authentication to obtain unauthorized access, including elevated privileges, in certain scenarios.\u003cbr\u003e\u003cdiv\u003e\\n\\n\\n\\n\\n\\n\u003cdiv\u003e\\n\\n\u003cdiv\u003e\u003ca\u003e\u003c/a\u003e\\n\\n\u003cp\u003e\u003cbr\u003e\u003c/p\u003e\\n\\n\u003c/div\u003e\\n\\n\u003c/div\u003e\\n\\n\u003c/div\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-347\", \"description\": \"CWE-347 Improper Verification of Cryptographic Signature\"}]}], \"providerMetadata\": {\"orgId\": \"7d616e1a-3288-43b1-a0dd-0a65d3e70a49\", \"shortName\": \"ConnectWise\", \"dateUpdated\": \"2026-03-17T14:48:59.940Z\"}}}",
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FKIE_CVE-2026-3564

Vulnerability from fkie_nvd - Published: 2026-03-17 15:16 - Updated: 2026-03-17 15:16

Severity ?

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

Summary

References

	URL	Tags
	7d616e1a-3288-43b1-a0dd-0a65d3e70a49	https://www.connectwise.com/company/trust/security-bulletins/2026-03-17-screenconnect-bulletin

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A condition in ScreenConnect may allow an actor with access to server-level cryptographic material used for authentication to obtain unauthorized access, including elevated privileges, in certain scenarios."
    }
  ],
  "id": "CVE-2026-3564",
  "lastModified": "2026-03-17T15:16:19.253",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.0,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 6.0,
        "source": "7d616e1a-3288-43b1-a0dd-0a65d3e70a49",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-03-17T15:16:19.253",
  "references": [
    {
      "source": "7d616e1a-3288-43b1-a0dd-0a65d3e70a49",
      "url": "https://www.connectwise.com/company/trust/security-bulletins/2026-03-17-screenconnect-bulletin"
    }
  ],
  "sourceIdentifier": "7d616e1a-3288-43b1-a0dd-0a65d3e70a49",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-347"
        }
      ],
      "source": "7d616e1a-3288-43b1-a0dd-0a65d3e70a49",
      "type": "Secondary"
    }
  ]
}

GHSA-HRC2-HCHG-RQ8R

Vulnerability from github – Published: 2026-03-17 15:36 – Updated: 2026-03-17 15:36

Details

Severity ?

9.0 (Critical)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-3564"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-347"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-17T15:16:19Z",
    "severity": "CRITICAL"
  },
  "details": "A condition in ScreenConnect may allow an actor with access to server-level cryptographic material used for authentication to obtain unauthorized access, including elevated privileges, in certain scenarios.",
  "id": "GHSA-hrc2-hchg-rq8r",
  "modified": "2026-03-17T15:36:23Z",
  "published": "2026-03-17T15:36:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3564"
    },
    {
      "type": "WEB",
      "url": "https://www.connectwise.com/company/trust/security-bulletins/2026-03-17-screenconnect-bulletin"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/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-2026-3564 (GCVE-0-2026-3564)

FKIE_CVE-2026-3564

GHSA-HRC2-HCHG-RQ8R

Tags

Sightings

Nomenclature