CVE-2019-11708
Published: May 23, 2022
Official Description
Mozilla Firefox and Thunderbird contain a sandbox escape vulnerability that could result in remote code execution.
CISA KEV Advisory
Mozilla Firefox and Thunderbird Sandbox Escape Vulnerability
Mozilla Firefox and Thunderbird contain a sandbox escape vulnerability that could result in remote code execution.
Apply updates per vendor instructions.
Risk Analysis
This sandbox escape vulnerability in Mozilla Firefox and Thunderbird could lead to remote code execution. The high EPSS score of 0.68885 suggests a significant probability of exploitation, and its inclusion in CISA's KEV confirms active exploitation.
This vulnerability is actively being exploited in the wild, as indicated by its inclusion in CISA's KEV. The nature of the flaw suggests it is remotely exploitable.
Users of Mozilla Firefox and Thunderbird should update to the latest versions to mitigate this vulnerability. Regularly update all web browsers and email clients to protect against known exploits.
Technical Analysis
CVE-2019-11708 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2019-11708 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Affected Vendors & Products
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2019-11708 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1