Vulnerability-Lookup

FKIE_CVE-2026-4434

Vulnerability from fkie_nvd - Published: 2026-03-20 13:16 - Updated: 2026-06-17 10:56

Severity

8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

Improper certificate validation in the PAM propagation WinRM connections allows a network attacker to perform a man-in-the-middle attack via disabled TLS certificate verification.

References

	URL	Tags
	security@devolutions.net	https://devolutions.net/security/advisories/DEVO-2026-0005/	Vendor Advisory

Impacted products

	Vendor	Product	Version
	devolutions	devolutions_server	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Server",
          "vendor": "Devolutions",
          "versions": [
            {
              "lessThan": "2026.1",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "security@devolutions.net"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:devolutions:devolutions_server:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "53FC3C38-3A6C-4AE1-B2CA-10B238EE6BE1",
              "versionEndExcluding": "2026.1.6.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Improper certificate validation in the PAM propagation WinRM connections\n allows a network attacker to perform a man-in-the-middle attack via \ndisabled TLS certificate verification."
    },
    {
      "lang": "es",
      "value": "La validaci\u00f3n de certificado incorrecta en las conexiones WinRM de propagaci\u00f3n de PAM permite a un atacante de red realizar un ataque man-in-the-middle a trav\u00e9s de la verificaci\u00f3n de certificado TLS deshabilitada."
    }
  ],
  "id": "CVE-2026-4434",
  "lastModified": "2026-06-17T10:56:33.950",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 5.9,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-4434",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-03-23T14:11:59.346311Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-03-20T13:16:13.043",
  "references": [
    {
      "source": "security@devolutions.net",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://devolutions.net/security/advisories/DEVO-2026-0005/"
    }
  ],
  "sourceIdentifier": "security@devolutions.net",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-295"
        }
      ],
      "source": "security@devolutions.net",
      "type": "Secondary"
    }
  ]
}

CVE-2026-4434 (GCVE-0-2026-4434)

Vulnerability from cvelistv5 – Published: 2026-03-20 12:52 – Updated: 2026-03-23 14:12

Summary

Improper certificate validation in the PAM propagation WinRM connections allows a network attacker to perform a man-in-the-middle attack via disabled TLS certificate verification.

Severity

8.1 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-23 14:11 UTC

CWE

CWE-295 - Improper certificate validation

Assigner

DEVOLUTIONS mitre root

References

1 reference

URL	Tags
https://devolutions.net/security/advisories/DEVO-…

Impacted products

1 product

Vendor	Product	Version
Devolutions	Server	Affected: 0 , < 2026.1 (custom)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 8.1,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-4434",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-23T14:11:59.346311Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-23T14:12:02.673Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Server",
          "vendor": "Devolutions",
          "versions": [
            {
              "lessThan": "2026.1",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
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              "base64": false,
              "type": "text/html",
              "value": "Improper certificate validation in the PAM propagation WinRM connections\n allows a network attacker to perform a man-in-the-middle attack via \ndisabled TLS certificate verification."
            }
          ],
          "value": "Improper certificate validation in the PAM propagation WinRM connections\n allows a network attacker to perform a man-in-the-middle attack via \ndisabled TLS certificate verification."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-295",
              "description": "CWE-295 Improper certificate validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-20T12:52:55.762Z",
        "orgId": "bfee16bd-18e6-446c-9a65-f5b2e3d89c23",
        "shortName": "DEVOLUTIONS"
      },
      "references": [
        {
          "url": "https://devolutions.net/security/advisories/DEVO-2026-0005/"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "x_generator": {
        "engine": "Vulnogram 1.0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "bfee16bd-18e6-446c-9a65-f5b2e3d89c23",
    "assignerShortName": "DEVOLUTIONS",
    "cveId": "CVE-2026-4434",
    "datePublished": "2026-03-20T12:52:55.762Z",
    "dateReserved": "2026-03-19T18:23:32.838Z",
    "dateUpdated": "2026-03-23T14:12:02.673Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.