CVE-2026-16421: Inappropriate implementation in WebAudio in Google Chrome prior to 150.0.7871.182 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chr

highCVSS 8.8CVE-2026-16421

Inappropriate implementation in WebAudio in Google Chrome prior to 150.0.7871.182 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)

Details

Source: NVD Recent CVEs (US · database · site)
Severity: high — CVSS 8.8
Published: 2026-07-21
Last updated: 2026-07-24
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-16421

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-164210.34% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 27% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-16421	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

high[NEW] [high] Google Chrome: Multiple vulnerabilitiescert-bund
unknownMicrosoft Edge Multiple Vulnerabilitieshkcert
unknownMultiple vulnerabilities in Microsoft Edge (July 24, 2026)cert-fr-avis
unknownGoogle Chrome Multiple Vulnerabilitieshkcert
unknownMultiple vulnerabilities in Google Chrome (July 22, 2026)cert-fr-avis
unknownDSA-6396-1 chromium - security updatedebian
unknownCVE-2026-16421: Chromium: CVE-2026-16421 Inappropriate implementation in WebAudiomsrc

Recent advisories for Inappropriate implementation in

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

mediumCVE-2026-18018: Inappropriate implementation in Updater in Google Chrome on Windows prior to 151.0.7922.72 all…nvd · 2026-07-30
criticalCVE-2026-18015: Inappropriate implementation in Tint in Google Chrome on Mac prior to 151.0.7922.72 allowed a …nvd · 2026-07-30
mediumCVE-2026-18013: Inappropriate implementation in Chrome for iOS in Google Chrome on iOS prior to 151.0.7922.72 …nvd · 2026-07-30
lowCVE-2026-18011: Inappropriate implementation in Chrome for iOS in Google Chrome on iOS prior to 151.0.7922.72 …nvd · 2026-07-30
mediumCVE-2026-18010: Inappropriate implementation in Passwords in Google Chrome prior to 151.0.7922.72 allowed a re…nvd · 2026-07-30
mediumCVE-2026-18008: Inappropriate implementation in Settings in Google Chrome prior to 151.0.7922.72 allowed a rem…nvd · 2026-07-30