What is the CVSS score of CVE-2025-27918?

CVE-2025-27918 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of Windows are affected by CVE-2025-27918?

Organizations using AnyDesk for Windows face critical risk from CVE-2025-27918, a integer overflow vulnerability rated CVSS 9.8.

Is there a public PoC exploit available for CVE-2025-27918?

Yes, a public proof-of-concept exploit is available for CVE-2025-27918. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2025-27918?

Within 24 hours: Identify all affected systems running AnyDesk for Windows and apply vendor patches immediately. Monitor vendor channels for patch availability.

Windows CVE-2025-27918

CRITICAL

Integer Overflow or Wraparound (CWE-190)

2025-11-06 cve@mitre.org

Windows Buffer Overflow Google Integer Overflow Apple iOS macOS Microsoft Android Anydesk

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:20 vuln.today

PoC Detected

Dec 08, 2025 - 17:16 vuln.today

Public exploit code

CVE Published

Nov 06, 2025 - 18:15 nvd

CRITICAL 9.8

DescriptionCVE.org

An issue was discovered in AnyDesk for Windows before 9.0.5, AnyDesk for macOS before 9.0.1, AnyDesk for Linux before 7.0.0, AnyDesk for iOS before 7.1.2, and AnyDesk for Android before 8.0.0. It has an integer overflow and resultant heap-based buffer overflow via a UDP packet during processing of an Identity user image within the Discovery feature, or when establishing a connection between any two clients.

AnalysisAI

An issue was discovered in AnyDesk for Windows before 9.0.5, AnyDesk for macOS before 9.0.1, AnyDesk for Linux before 7.0.0, AnyDesk for iOS before 7.1.2, and AnyDesk for Android before 8.0.0. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Integer Overflow (CWE-190), which allows attackers to cause unexpected behavior through arithmetic overflow. An issue was discovered in AnyDesk for Windows before 9.0.5, AnyDesk for macOS before 9.0.1, AnyDesk for Linux before 7.0.0, AnyDesk for iOS before 7.1.2, and AnyDesk for Android before 8.0.0. It has an integer overflow and resultant heap-based buffer overflow via a UDP packet during processing of an Identity user image within the Discovery feature, or when establishing a connection between any two clients. Affected products include: Anydesk. Version information: before 9.0.5.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate arithmetic operations, use safe integer libraries, check bounds before allocation.