CVE-2026-6773
An attacker can exploit multiple vulnerabilities in Mozilla Thunderbird, Mozilla Firefox ESR, and Mozilla Firefox to escalate privileges, conduct a Denial of Service attack, disclose information, present false information, and bypass security measures.
CSIRTS triage
- What
- Multiple vulnerabilities can be exploited to escalate privileges, conduct a Denial of Service attack, disclose information, present false information, and bypass security measures.
- Who is affected
- Users of Mozilla Thunderbird, Firefox ESR, and Firefox.
- Urgency
- Remediation is urgent due to the high severity and multiple attack vectors.
- Action
- Update to the latest versions of Mozilla Thunderbird, Firefox ESR, and Firefox.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.32% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 25% of all EPSS-scored CVEs.
Advisory coverage (1)
- high[UPDATE] [high] Mozilla Thunderbird, Firefox ESR and Firefox: Multiple vulnerabilitiescert-bund · 2026-07-22
External references
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