CVE-2020-15999

Status: AnalyzedCritical (9.6)⚠ Active exploitation💥 PoC

Heap buffer overflow in Freetype in Google Chrome prior to 86.0.4240.111 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

CVSS

Version: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Base score: 9.6

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 64%
Percentile among all scored CVEs: 99
Score date: 10/6/2026

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).

CISA KEV — actively exploited

Added to catalog: 11/3/2021
Remediation due date: 11/17/2021
Known ransomware use: Unknown

💥 Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

Proof of concept on GitHub (unverified) · List of proofs of concept on GitHub

⚠️ GitHub proofs of concept are not verified: some are fake or contain malware. Never run them outside an isolated lab.

🎯 ATT&CK techniques

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

ExploitationT1203 Exploitation for Client Executionexecution85 %
Secondary impactT1499.004 Application or System Exploitationimpact45 %

Buffer overflow en Freetype requiere interacción del usuario (UI:R) para abrir HTML malicioso en Chrome. Permite corrupción de heap (RCE potencial) y DoS; impacto crítico (C:H/I:H/A:H).

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

Filter Network Traffic Application Isolation and Sandboxing Exploit Protection Update Software

Affected technologies (6)

Debian — Debian Linux Fedoraproject — Fedora Freetype — Freetype Google — Chrome Netapp — Ontap Select Deploy Administration Utility Opensuse — Backports SLE

CWEs

CWE-787
CWE-120

References

Raw JSON (NVD)

Show

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