How to fix CVE-2025-27917?

Within 30 days: Identify all affected systems running AnyDesk for Windows and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Is Deserialization affected by CVE-2025-27917?

Organizations using AnyDesk for Windows face notable risk from CVE-2025-27917, a null pointer dereference vulnerability rated CVSS 7.5. Exploitation could compromise the security of affected deployments. Proof-of-concept code is publicly available, increasing the risk of exploitation.

CVE-2025-27917

HIGH

2025-11-06 [email protected]

7.5

CVSS 3.1

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

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

HIGH 7.5

Description

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. Remote Denial of Service can occur because of incorrect deserialization that results in failed memory allocation and a NULL pointer dereference.

Analysis

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 high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical Context

This vulnerability is classified as NULL Pointer Dereference (CWE-476), which allows attackers to crash the application by dereferencing a null pointer. 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. Remote Denial of Service can occur because of incorrect deserialization that results in failed memory allocation and a NULL pointer dereference. Affected products include: Anydesk. Version information: before 9.0.5.

Affected Products

Anydesk.

Remediation

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Check pointers before dereferencing. Use static analysis tools to detect null pointer paths.

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +0.5

CVSS: +38

POC: +20

CVE-2025-27917 vulnerability details – vuln.today

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CVE-2025-27917

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CVE-2025-27917

CVSS Vector

Lifecycle Timeline

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Description

Analysis

Technical Context

Affected Products

Remediation

Priority Score

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External POC / Exploit Code