CVE-2026-16409
Multiple vulnerabilities have been discovered in Mozilla Thunderbird. Some of them allow an attacker to cause remote arbitrary code execution, privilege escalation, and remote denial of service.
CSIRTS triage
- What
- Multiple vulnerabilities allow an attacker to cause remote arbitrary code execution, privilege escalation, and remote denial of service.
- Who is affected
- Users of Mozilla Thunderbird are affected.
- Urgency
- Remediation is urgent due to the potential for remote code execution.
- Action
- Update to the latest version of Thunderbird to fix these vulnerabilities.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.29% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 21% of all EPSS-scored CVEs.
Advisory coverage (3)
- unknownMultiple vulnerabilities in Mozilla Thunderbird (July 23, 2026)cert-fr-avis · 2026-07-23
- unknownMultiple vulnerabilities in Mozilla products (July 22, 2026)cert-fr-avis · 2026-07-22
- highCVE-2026-16409: Invalid pointer in the Security: PSM component. This vulnerability was fixed in Firefox 153 an…nvd · 2026-07-21
External references
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