CVE-2026-16352

Status: AnalyzedCritical (9.8)—

Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.

CVSS

Version: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base score: 9.8

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.39%
Percentile among all scored CVEs: 31
Score date: 10/5/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1190 Exploit Public-Facing Applicationinitial access85 %
Primary impactT1059 Command and Scripting Interpreterexecution80 %
Secondary impactT1068 Exploitation for Privilege Escalationprivilege escalation75 %

Vector CVSS AV:N/AC:L/PR:N/UI:N indica vulnerabilidad remota sin privilegios ni interacción (T1190). Use-after-free en APIs permite ejecución de código y escape de sandbox otorgando privilegios de ejecución local (T1059, T1068).

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Privileged Account Management Execution Prevention Application Isolation and Sandboxing Exploit Protection Update Software Vulnerability Scanning

Affected technologies (2)

Mozilla — Firefox Mozilla — Thunderbird

CWEs

CWE-416

References

Raw JSON (NVD)

Show

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