CVE-2026-87487

Status: AnalyzedHigh (8.3)—

Missing authorization in FileSystem in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process and leveraged social engineering to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Medium)

CVSS

Version: 3.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Base score: 8.3

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.39%
Percentile among all scored CVEs: 31
Score date: 10/4/2026

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.

ExploitationT1203 Exploitation for Client Executionexecution85 %
Primary impactT1059 Command and Scripting Interpreterexecution80 %
Secondary impactT1068 Exploitation for Privilege Escalationprivilege escalation75 %

UI:R y AV:N → interacción del usuario en cliente (T1203). Código arbitrario fuera sandbox implica ejecución (T1059) y bypass de aislamiento de privilegios (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

Execution Prevention Application Isolation and Sandboxing Exploit Protection Update Software Threat Intelligence Program Restrict Web-Based Content

Affected technologies (1)

Google — Chrome

CWEs

CWE-862

References

Raw JSON (NVD)

Show

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