AUGUST 4, 2026
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Case File

CVE-2025-5262

HIGH · CVSS 7.5 EPSS 0.39% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2025-05-27 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 7.5. Public exploit code or proof-of-concept references have been detected in its references.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2025-5262
Severity
HIGH
CVSS
7.5
EPSS
0.39%

Original NVD Description

A double-free could have occurred in `vpx_codec_enc_init_multi` after a failed allocation when initializing the encoder for WebRTC. This could have caused memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 139 and Thunderbird < 128.11.

Related CVEs

Other vulnerabilities affecting the same vendor(s)