MediumPublic exploit

Insufficient data validation in Google Chrome V8

IdentifiersCVE-2020-16040CWE-20· Improper Input Validation

CVE-2020-16040 is a high-severity vulnerability in the V8 JavaScript engine in Google Chrome caused by insufficient data validation. According to the provided content, affected Chrome versions prior to 87.0.4280.88 could be induced into heap corruption by a remote attacker via a crafted HTML page. The issue was reported by Lucas Pinheiro of Microsoft Browser Vulnerability Research on 2020-11-19 and patched in Chrome 87.0.4280.88. The available content does not identify the exact vulnerable V8 function or code path.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation can trigger heap corruption in the Chrome renderer/V8 context and may allow remote code execution or other attacker-controlled memory corruption outcomes when a victim visits a malicious web page. The content also indicates the flaw was actively exploited in the wild in campaigns that used fake Chrome update lures and malware delivery, showing practical use as an initial compromise vector.

Mitigation

If you can’t patch tonight, do this now.

Until patching is complete, reduce exposure by restricting use of outdated Chrome versions, limiting access to untrusted or attacker-controlled websites, and enforcing browser update policies. Enterprise controls such as application isolation/sandboxing, web filtering, and detection for exploitation chains or suspicious post-exploitation activity can reduce risk, but the primary mitigation is vendor patching.

Remediation

Patch, then assume compromise.

Upgrade Google Chrome to version 87.0.4280.88 or later, as the vulnerability affects versions prior to 87.0.4280.88. Apply current vendor security updates across all Chromium-based deployments where applicable and verify that vulnerable browser versions are no longer present in the environment.

PUBLIC EXPLOITS

Exploits

No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.

VALID 0 / 1 TOTALView more in app

All candidate exploits were filtered out by Mallory's validation.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

GoogleChromeapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

12 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

12 SOURCESView more in app

ctoatncsc substackNews

Feb 7, 2026

CTO at NCSC Summary: week ending February 8th

A Google Chrome V8 vulnerability (CVE-2020-16040) referenced as being leveraged in China-aligned campaigns alongside social engineering (fake Chrome update lures) and follow-on payload delivery.

gbhackersNews

Feb 2, 2026

PeckBirdy Hackers Abuse LOLBins Across Environments to Deploy Advanced Malware

A Google Chrome vulnerability described as an insufficient data validation flaw, leveraged in the SHADOW-EARTH-045 campaign alongside social engineering to facilitate malware execution.

dark readingNews

Jan 30, 2026

Chinese APTs Hacking Asian Orgs With High-End Malware

A Google Chrome vulnerability referenced as being exploited via a PeckBirdy-hosted script in a watering-hole style campaign to compromise visitors and facilitate follow-on malware delivery.

dark readingNews

Jan 28, 2026

China-Backed 'PeckBirdy' Takes Flight for Cross-Platform Attacks

A remote code execution (RCE) vulnerability in Google Chrome that was leveraged as an exploit in the Shadow-Void-044 campaign to help deliver/execute attacker code and support persistent access operations.

+4 more in the timeline

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence5

Every observed campaign linking this CVE to a named adversary.

Associated malware8

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity4

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES

MITRE CVE

cve.org · CVE-2020-16040

NVD

nvd.nist.gov/vuln/detail/CVE-2020-16040

MITRE CWE · CWE-20

Improper Input Validation

Patch

crbug.com/1150649

Vendor Advisory

chromereleases.googleblog.com/2020/12/stable-channel-update-for-desktop.html

Third Party Advisory

packetstormsecurity.com/files/162106/Google-Chrome-86.0.4240-V8-Remote-Code-Execution.html

Third Party Advisory

packetstormsecurity.com/files/162144/Google-Chrome-SimplfiedLowering-Integer-Overflow.html