Is CVE-2025-51495 actively exploited?

CVE-2025-51495 has no public evidence of in-the-wild exploitation as of 2025-10-16.

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

CVE-2025-51495 has a CVSS score of 7.5 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

How do I patch CVE-2025-51495?

Patch guidance is available from cesanta security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2025-51495.

Fix CVE-2025-51495 - HIGH cesanta mongoose

Description

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: CWE-190 · Integer Overflow

Metadata

Primary Vendor: CESANTA
Published: 9/29/2025
Last Modified: 10/16/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

cesanta : mongoose

Remediation Guidance

Executive Summary

Cite this page

CVE-2025-51495. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2025-51495

View on NIST NVD

CVE-2025-51495 vulnerability