CVE-2026-16361

CriticalCVSS 9.8

Published: 21/07/2026(UTC)Updated: 24/07/2026(UTC)Translated: 24/07/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.33%

25th percentile - higher than 25% of all known CVEs

Summary

Memory safety bugs in Thunderbird ESR 140.12 that could allow arbitrary code execution. This vulnerability was fixed in Firefox ESR 115.38, Firefox ESR 140.13, and Thunderbird 140.13.

Risk Assessment

An attacker could exploit these bugs to execute arbitrary code remotely, leading to full system compromise.

Recommendation

Update Firefox ESR to version 115.38 or 140.13 and Thunderbird to version 140.13.

Original NVD description (English source)

Memory safety bugs present in Thunderbird ESR 140.12. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox ESR 115.38, Firefox ESR 140.13, and Thunderbird 140.13.