What is the CVSS score of CVE-2025-51495?

CVE-2025-51495 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.3%.

Which versions of Mongoose are affected by CVE-2025-51495?

CVE-2025-51495 presents notable security risk, a integer overflow vulnerability rated CVSS 7.5.. A patch is available.

Is there a public PoC exploit available for CVE-2025-51495?

Yes, a public proof-of-concept exploit is available for CVE-2025-51495. Prioritise patching immediately. EPSS: 0.3%.

How to fix or mitigate CVE-2025-51495?

Within 30 days: Identify all affected systems and apply vendor patches as part of regular patch cycle. Vendor patch is available.

Mongoose CVE-2025-51495

HIGH

Integer Overflow or Wraparound (CWE-190)

2025-09-29 cve@mitre.org

Buffer Overflow Integer Overflow Red Hat Mongoose

7.5

CVSS 3.1

CVSS VectorNVD

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 - 19:14 vuln.today

Patch released

Mar 28, 2026 - 19:14 nvd

Patch available

PoC Detected

Oct 16, 2025 - 17:00 vuln.today

Public exploit code

CVE Published

Sep 29, 2025 - 17:15 nvd

HIGH 7.5

DescriptionNVD

An integer overflow vulnerability exists in the WebSocket component of Mongoose 7.5 thru 7.17. By sending a specially crafted WebSocket request, an attacker can cause the application to crash. If downstream vendors integrate this component improperly, the issue may lead to a buffer overflow.

AnalysisAI

An integer overflow vulnerability exists in the WebSocket component of Mongoose 7.5 thru 7.17. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified as Integer Overflow (CWE-190), which allows attackers to cause unexpected behavior through arithmetic overflow. An integer overflow vulnerability exists in the WebSocket component of Mongoose 7.5 thru 7.17. By sending a specially crafted WebSocket request, an attacker can cause the application to crash. If downstream vendors integrate this component improperly, the issue may lead to a buffer overflow. Affected products include: Cesanta Mongoose.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Validate arithmetic operations, use safe integer libraries, check bounds before allocation.