CVE-2026-2792
CriticalCVSS 9.8Exploitation Probability (EPSS)
Low risk23th percentile - higher than 23% of all known CVEs
Summary
Memory safety bugs were found in Firefox ESR 140.7, Firefox 147, Thunderbird ESR 140.7, and Thunderbird 147. Some of these bugs showed evidence of memory corruption and could potentially be exploited to run arbitrary code with enough effort.
Risk Assessment
The organization is at risk of remote code execution, which could lead to data theft, malware installation, or complete compromise of system confidentiality and integrity.
Recommendation
Immediately update all Firefox instances to version 148 or Firefox ESR to 140.8, and Thunderbird to version 148 or Thunderbird ESR to 140.8.
Original NVD description (English source)
Memory safety bugs present in Firefox ESR 140.7, Thunderbird ESR 140.7, Firefox 147 and Thunderbird 147. 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 148, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.