CVE-2019-11708VulnerabilityPublished 05/23/2022Updated 10/24/2026

CVE-2019-11708: Mozilla Firefox and Thunderbird Sandbox Escape Vulnerability

Affects Mozilla Firefox and ThunderbirdSource CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 05/23/2022
KEV deadline: 06/13/2022
EPSS: 55.9% chance of exploitation in 30 days – higher than 99% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2019-11708 (opens in a new tab)

Description

CVE-2019-11708 is a sandbox escape vulnerability in Mozilla Firefox and Thunderbird that could allow remote code execution. This vulnerability has been exploited in the wild. No specific affected versions or patch information is provided in the available data.

Summary

Mozilla Firefox and Thunderbird contain a sandbox escape vulnerability identified as CVE-2019-11708. This vulnerability could enable an attacker to escape the sandbox environment and execute code remotely. The vulnerability is classified with a high severity and has been observed to be exploited in the wild. No detailed version information or patch availability is provided in the source data.

Impact

Successful exploitation of this vulnerability could lead to remote code execution outside the sandbox, potentially allowing attackers to execute arbitrary code on the affected system. This poses a significant security risk to users of Firefox and Thunderbird.

Mitigation

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Users should monitor Mozilla's official security advisories for updates and apply any available patches promptly once released.

Weaknesses

CWE-20Improper Input Validation (opens in a new tab)

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 11:40:58 UTC

Weaknesses

References

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