CVE-2026-41034

Full vulnerability record from the local CVENow database.

Description

ONLYOFFICE DocumentServer before 9.3.0 has an untrusted pointer dereference in XLS processing/conversion (via pictFmla.cbBufInCtlStm and other vectors), leading to an information leak and ASLR bypass.

Severity

MEDIUM

CVSS score

5.0 (v3.1)

Vulnerability status

Awaiting Analysis

Source identifier

[email protected]

Published

2026-04-16 07:16:30.843000

Last modified

2026-10-26 21:10:00.170000

View original CVE JSON

{
  "id": "CVE-2026-41034",
  "sourceIdentifier": "[email protected]",
  "published": "2026-04-16T07:16:30.843",
  "lastModified": "2026-10-26T21:10:00.170",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "ONLYOFFICE DocumentServer before 9.3.0 has an untrusted pointer dereference in XLS processing/conversion (via pictFmla.cbBufInCtlStm and other vectors), leading to an information leak and ASLR bypass."
    },
    {
      "lang": "es",
      "value": "ONLYOFFICE DocumentServer anterior a la versión 9.3.0 tiene una desreferencia de puntero no confiable en el procesamiento/conversión de XLS (a través de pictFmla.cbBufInCtlStm y otros vectores), lo que lleva a una fuga de información y un bypass de ASLR."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Ascensio",
          "product": "ONLYOFFICE DocumentServer",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "lessThan": "9.3.0",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N",
          "baseScore": 5.0,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 1.4
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-04-16T12:20:07.491049Z",
          "id": "CVE-2026-41034",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/ONLYOFFICE/DocumentServer/blob/master/CHANGELOG.md",
      "source": "[email protected]"
    }
  ]
}