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PatchSiren cyber security CVE debrief

CVE-2026-41030 Ascensio CVE debrief

CVE-2026-41030 ONLYOFFICE DesktopEditors update service vulnerability allows attackers to perform actions on files with SYSTEM privileges before version 9.3.0, potentially leading to elevation of privileges and unauthorized file modifications. System administrators and security teams should assess their exposure, verify that they are running a patched version, and monitor system logs for potential exploitation attempts. The vulnerability requires verification from official sources to determine the affected versions and potential impact. Affected product deployments should be identified in managed environments, and owners should be assigned for follow-up. The CVE record and NVD are

Vendor
Ascensio
Product
ONLYOFFICE DesktopEditors
CVSS
MEDIUM 6.2
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-16
Original CVE updated
2026-10-26
Advisory published
2026-04-16
Advisory updated
2026-10-26

Who should care

System administrators and security teams responsible for managing ONLYOFFICE DesktopEditors installations should assess their exposure and verify that they are running a patched version.

Why it matters

CVE-2026-41030 is a medium-severity vulnerability in ONLYOFFICE DesktopEditors that allows attackers to perform actions on files with SYSTEM privileges. System administrators and security teams should assess their exposure, verify that they are running version 9.3.0 or later, and monitor system logs for potential exploitation attempts. The vulnerability requires verification from official sources to determine the affected versions and potential impact.

  • Potential elevation of privileges to SYSTEM level
  • Possible unauthorized file modifications
  • Required verification of ONLYOFFICE DesktopEditors version and update service configuration
  • Necessity to monitor system logs for exploitation attempts

Technical summary

The ONLYOFFICE DesktopEditors update service allows attackers to perform actions on files with SYSTEM privileges before version 9.3.0. This medium-severity vulnerability can lead to potential elevation of privileges to SYSTEM level and possible unauthorized file modifications. System administrators and security teams should review the ONLYOFFICE DesktopEditors update service configuration to ensure it is properly secured, verify that the system is running version 9.3.0 or later of ONLYOFFICE DesktopEditors, and monitor system logs for potential exploitation

Defensive priority

Medium priority for system administrators and security teams

Recommended defensive actions

  • Review the ONLYOFFICE DesktopEditors update service configuration to ensure it is properly secured.
  • Verify that the system is running version 9.3.0 or later of ONLYOFFICE DesktopEditors.
  • Monitor system logs for potential exploitation attempts.

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability. Further verification is required to determine the affected versions and potential impact.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-41030 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-41030

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-41030 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-41030

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.