Vulnerability in AnyDesk

[ Why it matters ]Priority signals

• Public proof-of-concept exploit exists (CISA SSVC)
• Critical severity: CVSS 9.8

[ Description ]Official description

AnyDesk before 8.0.3 allows unauthenticated remote attackers to execute arbitrary code via a heap-based buffer overflow, as demonstrated on Linux for command execution as root without the victim approving desktop control. In the stream packet handler for mode 5 in the session protocol, a payload length value is not validated.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund12 Oct 2026WID-SEC-2026-3882

  AnyDesk: Vulnerability allows arbitrary code execution with administrator rights Translated from German

  CVE-2026-109390

[ References ]References

• anydesk.com/en/changelog/linux
• github.com/v12-security/pocs/tree/main/anydesk