AnyDesk before 8.0.3 allows unauthenticated remote attackers to execute arbitrary code via a heap-based buffer overflow, as demonstrated on Linux… (CVE-2026-109390)
Description
AnyDesk versions prior to 8.0.3 contain a critical heap-based buffer overflow vulnerability that allows unauthenticated remote attackers to execute arbitrary code as root on Linux systems without user approval. The flaw exists in the stream packet handler for mode 5 in the session protocol, where a payload length value is not properly validated.
CVSS v3.1
Score 9.8critical
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-109390 describes a heap-based buffer overflow vulnerability in AnyDesk before version 8.0.3. This vulnerability allows unauthenticated remote attackers to execute arbitrary code with root privileges on Linux systems by exploiting improper validation of a payload length value in the stream packet handler for mode 5 within the session protocol. The vulnerability enables command execution without requiring the victim's approval for desktop control.
Potential Impact
Successful exploitation results in remote code execution as root without user interaction or approval, leading to full system compromise on affected Linux installations of AnyDesk prior to 8.0.3. The CVSS score of 9.8 indicates critical severity with high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
An official fix is available in AnyDesk version 8.0.3. Users and administrators should upgrade to version 8.0.3 or later to remediate this vulnerability. No other mitigations are specified.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-p2jv-fpmf-jqjw
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-109390"]
- Database Specific Severity
- CRITICAL
- Cvss Version
- 3.1
Threat ID: 6acd55622cdf04f656da8813
Added to database: 10/12/2026, 21:47:14 UTC
Last enriched: 10/12/2026, 22:05:32 UTC
Last updated: 10/12/2026, 22:28:26 UTC
Views: 14
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.