CVE-2026-12755 (GCVE-0-2026-12755)

Vulnerability from cvelistv5 – Published: 2026-06-25 13:12 – Updated: 2026-06-25 14:52
VLAI
Summary
Improper input validation in the PAM AD discovery endpoints in Devolutions Server 2026.2.4.0 through 2026.2.7.0 allows an authenticated user with the UserGroupsView permission to coerce server-side authentication to an attacker-controlled host, exposing PAM provider credentials as a NTLMv2 challenge-response, via a crafted DomainName parameter.
Severity
2.7 (Low)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-25 14:52 UTC
CWE
  • CWE-1284 - Improper validation of specified quantity in input
Assigner
DEVOLUTIONS CNA under the mitre root
CNA scorecard E 44/100 over 64 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Devolutions Server Affected: 2026.2.4.0 , < 2026.2.7.0 (custom)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 2.7,
              "baseSeverity": "LOW",
              "confidentialityImpact": "LOW",
              "integrityImpact": "NONE",
              "privilegesRequired": "HIGH",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-12755",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-25T14:52:17.880696Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-25T14:52:29.837Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Server",
          "vendor": "Devolutions",
          "versions": [
            {
              "lessThan": "2026.2.7.0",
              "status": "affected",
              "version": "2026.2.4.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Improper input validation in the PAM AD discovery endpoints in \nDevolutions Server 2026.2.4.0 through 2026.2.7.0 allows an authenticated\n user with the UserGroupsView permission to coerce server-side \nauthentication to an attacker-controlled host, exposing PAM provider \ncredentials as a NTLMv2 challenge-response, via a crafted DomainName \nparameter."
            }
          ],
          "value": "Improper input validation in the PAM AD discovery endpoints in \nDevolutions Server 2026.2.4.0 through 2026.2.7.0 allows an authenticated\n user with the UserGroupsView permission to coerce server-side \nauthentication to an attacker-controlled host, exposing PAM provider \ncredentials as a NTLMv2 challenge-response, via a crafted DomainName \nparameter."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1284",
              "description": "CWE-1284 Improper validation of specified quantity in input",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-25T13:12:54.439Z",
        "orgId": "bfee16bd-18e6-446c-9a65-f5b2e3d89c23",
        "shortName": "DEVOLUTIONS"
      },
      "references": [
        {
          "url": "https://devolutions.net/security/advisories/DEVO-2026-0020/"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "x_generator": {
        "engine": "Vulnogram 1.0.2"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "bfee16bd-18e6-446c-9a65-f5b2e3d89c23",
    "assignerShortName": "DEVOLUTIONS",
    "cveId": "CVE-2026-12755",
    "datePublished": "2026-06-25T13:12:54.439Z",
    "dateReserved": "2026-06-19T19:30:39.329Z",
    "dateUpdated": "2026-06-25T14:52:29.837Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-12755",
      "date": "2026-10-19",
      "epss": "0.00365",
      "percentile": "0.28861"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Server",
                "vendor": "Devolutions",
                "versions": [
                  {
                    "lessThan": "2026.2.7.0",
                    "status": "affected",
                    "version": "2026.2.4.0",
                    "versionType": "custom"
                  }
                ]
              }
            ],
            "source": "security@devolutions.net"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:devolutions:devolutions_server:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "035F9F71-2FA4-430F-8B3F-6B45B92FCF51",
                    "versionEndExcluding": "2026.2.9.0",
                    "versionStartIncluding": "2026.2.4.0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Improper input validation in the PAM AD discovery endpoints in \nDevolutions Server 2026.2.4.0 through 2026.2.7.0 allows an authenticated\n user with the UserGroupsView permission to coerce server-side \nauthentication to an attacker-controlled host, exposing PAM provider \ncredentials as a NTLMv2 challenge-response, via a crafted DomainName \nparameter."
          }
        ],
        "id": "CVE-2026-12755",
        "lastModified": "2026-06-29T15:15:58.117",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 2.7,
                "baseSeverity": "LOW",
                "confidentialityImpact": "LOW",
                "integrityImpact": "NONE",
                "privilegesRequired": "HIGH",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 1.2,
              "impactScore": 1.4,
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2026-12755",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-25T14:52:17.880696Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2026-06-25T14:16:36.333",
        "references": [
          {
            "source": "security@devolutions.net",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://devolutions.net/security/advisories/DEVO-2026-0020/"
          }
        ],
        "sourceIdentifier": "security@devolutions.net",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-1284"
              }
            ],
            "source": "security@devolutions.net",
            "type": "Secondary"
          }
        ]
      }
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "cvssV3_1": {
                  "attackComplexity": "LOW",
                  "attackVector": "NETWORK",
                  "availabilityImpact": "NONE",
                  "baseScore": 2.7,
                  "baseSeverity": "LOW",
                  "confidentialityImpact": "LOW",
                  "integrityImpact": "NONE",
                  "privilegesRequired": "HIGH",
                  "scope": "UNCHANGED",
                  "userInteraction": "NONE",
                  "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N",
                  "version": "3.1"
                }
              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-12755",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-06-25T14:52:17.880696Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-06-25T14:50:50.494Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Server",
              "vendor": "Devolutions",
              "versions": [
                {
                  "lessThan": "2026.2.7.0",
                  "status": "affected",
                  "version": "2026.2.4.0",
                  "versionType": "custom"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "Improper input validation in the PAM AD discovery endpoints in \nDevolutions Server 2026.2.4.0 through 2026.2.7.0 allows an authenticated\n user with the UserGroupsView permission to coerce server-side \nauthentication to an attacker-controlled host, exposing PAM provider \ncredentials as a NTLMv2 challenge-response, via a crafted DomainName \nparameter."
                }
              ],
              "value": "Improper input validation in the PAM AD discovery endpoints in \nDevolutions Server 2026.2.4.0 through 2026.2.7.0 allows an authenticated\n user with the UserGroupsView permission to coerce server-side \nauthentication to an attacker-controlled host, exposing PAM provider \ncredentials as a NTLMv2 challenge-response, via a crafted DomainName \nparameter."
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-1284",
                  "description": "CWE-1284 Improper validation of specified quantity in input",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-06-25T13:12:54.439Z",
            "orgId": "bfee16bd-18e6-446c-9a65-f5b2e3d89c23",
            "shortName": "DEVOLUTIONS"
          },
          "references": [
            {
              "url": "https://devolutions.net/security/advisories/DEVO-2026-0020/"
            }
          ],
          "source": {
            "discovery": "UNKNOWN"
          },
          "x_generator": {
            "engine": "Vulnogram 1.0.2"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "bfee16bd-18e6-446c-9a65-f5b2e3d89c23",
        "assignerShortName": "DEVOLUTIONS",
        "cveId": "CVE-2026-12755",
        "datePublished": "2026-06-25T13:12:54.439Z",
        "dateReserved": "2026-06-19T19:30:39.329Z",
        "dateUpdated": "2026-06-25T14:52:29.837Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    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.