CVE-2025-51495

HIGH 1 PoC
MEDIUM Priority: 0.03 BB Relevance: 85/100
Published: 2025-09-29 Modified: 2026-11-07 First seen: 2026-11-07 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: None
I: None
A: High

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.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
cesanta mongoose 7.5 – 7.17

Proof of Concept (1)

Bug Bounty Relevance

85 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction
✓ PoC available (1)

CVSS Score

7.5 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploitation Probability

0.42%
Raw Score 0.004240
Percentile 37.2%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00424
2026-11-12
0.00424
2026-11-10
0.00424
2026-11-09
0.00424
2026-11-08
0.00424
2026-11-07
0.00424

Intelligence Sources

nvd ref →