CVE-2026-109390

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-12 · updated 2026-10-16
Weakness: CWE-130

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.

Affected products

AnyDesk: from 8.0.0 before 8.0.3 — fixed in 8.0.3

How to fix

Upgrade to a fixed version: AnyDesk 8.0.3. Check the vendor advisory for mitigations.

References

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

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