What is the CVSS score of CVE-2020-16009?

CVE-2020-16009 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 48.6%.

Is there a public PoC exploit available for CVE-2020-16009?

Yes, a public proof-of-concept exploit is available for CVE-2020-16009. Prioritise patching immediately. EPSS: 48.6%.

Is there a patch available for CVE-2020-16009?

Yes, a patch is available for CVE-2020-16009. Update the affected software to the latest version immediately.

Cefsharp CVE-2020-16009

HIGH

Out-of-bounds Write (CWE-787)

2020-11-03 chrome-cve-admin@google.com

Buffer Overflow Google Memory Corruption Cefsharp Chrome Edge Edge Chromium Backports Sle Leap Fedora Debian Linux

8.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.8 HIGH

AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Added to CISA KEV

Jul 14, 2026 - 04:22 CISA

CVE Published

Nov 03, 2020 - 03:15 nvd

HIGH 8.8

DescriptionNVD

Inappropriate implementation in V8 in Google Chrome prior to 86.0.4240.183 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

AnalysisAI

Inappropriate implementation in V8 in Google Chrome prior to 86.0.4240.183 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Out-of-bounds Write (CWE-787), which allows attackers to write data beyond allocated buffer boundaries leading to code execution or crashes. Inappropriate implementation in V8 in Google Chrome prior to 86.0.4240.183 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. Affected products include: Cefsharp, Google Chrome, Microsoft Edge, Microsoft Edge Chromium, Opensuse Backports Sle. Version information: prior to 86.0.4240.183.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate write boundaries, use memory-safe languages, enable compiler protections (ASLR, stack canaries).