CVE-2025-51495

Name: CVE-2025-51495
Creator: NVD / NIST
Published: 2025-09-29T17:15:31.153+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.40%

Last modified Jun 17, 2026

CVE-2025-51495 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.40% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

0.40%

31.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-190

Affected Software

Vendor	Product	Versions
Cesanta	Mongoose	>= 7.5, <= 7.17

References

https://github.com/cainiao159357/CVE-2025-51495Exploit
https://github.com/cesanta/mongooseProduct
https://github.com/cesanta/mongoose/pull/3131Issue Tracking, Patch

Timeline

Published: Sep 29, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-51495?

How severe is CVE-2025-51495?

CVE-2025-51495 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.40% probability of exploitation in the next 30 days.

How do I fix CVE-2025-51495?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-51495?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST