CVE-2026-109390

Status: Awaiting AnalysisCritical (9.8)—

Severity9.8Critical · CVSS 3.1

Exploitation probability1.61 %higher than 76% of CVEs

Active exploitationNonot in the CISA catalog

Public exploitNot knownno public code found

News and reports on Orbitaley

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.

CVSS

Base score: 9.8
Version: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 1.61 %
Percentile among all scored CVEs: 76
Score date: 10/20/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Media coverage

Specialised security media that have cited this CVE:

Borns IT- und Windows-Blog · Schwachstelle CVE-2026-109390 (CVSS v3.1 9.8) im AnyDesk-Client für Linux (10/19/2026)

ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1190 Exploit Public-Facing Applicationinitial access95 %
Primary impactT1059 Command and Scripting Interpreterexecution90 %
Secondary impactT1068 Exploitation for Privilege Escalationprivilege escalation85 %

Vector CVSS red sin autenticación (AV:N/PR:N/UI:N) indica T1190. Desbordamiento de búfer en gestor de paquetes permite ejecución arbitraria de código (T1059) como root (T1068), demostrado en Linux sin aprobación del usuario.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

ATT&CK mitigations that cover these techniques

Privileged Account Management Execution Prevention Application Isolation and Sandboxing Exploit Protection Update Software Vulnerability Scanning

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Anydesk — Anydesk^AI

CWEs

CWE-130

References

Show 3 references

Raw JSON (NVD)

Show

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