CVE-2021-4079

HIGHNVD 8.88.8—

8.8

Out of bounds write in WebRTC in Google Chrome prior to 96.0.4664.93 allowed a remote attacker to potentially exploit heap corruption via crafted WebRTC packets.

CVSS v3: 8.8
EG Score: 8.8(medium)
EPSS: 80.7%
KEV: Not listed

Published

December 23, 2021

Last Modified

November 21, 2024

References (8)

chrome-cve-admin@googlehttps://chromereleases.googleblog.com/2021/12/stable-channel-update-for-desktop.html
chrome-cve-admin@googlehttps://crbug.com/1265806
chrome-cve-admin@googlehttps://security.gentoo.org/glsa/202208-25
chrome-cve-admin@googlehttps://www.debian.org/security/2022/dsa-5046
af854a3a-2127-422b-91ae-364da2661108https://chromereleases.googleblog.com/2021/12/stable-channel-update-for-desktop.html
af854a3a-2127-422b-91ae-364da2661108https://crbug.com/1265806
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202208-25
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2022/dsa-5046

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-787Out-of-bounds Write

Data Freshness Timeline

(refreshed 13× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-08 14:15 UTCEPSS rescore
2026-06-08 14:15 UTCEPSS rescore
2026-06-08 14:15 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-06 13:46 UTCEPSS rescore
2026-06-06 13:46 UTCEPSS rescore
2026-06-05 22:45 UTCEPSS rescore
2026-06-05 22:45 UTCEPSS rescore
2026-06-05 06:09 UTCEPSS rescore
2026-06-05 06:09 UTCEPSS rescore
2026-06-04 13:11 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 00:15 UTCEPSS rescore
2026-05-31 00:15 UTCEPSS rescore

Frequently asked(5)

What is CVE-2021-4079?

CVE-2021-4079 is a high vulnerability published on December 23, 2021. Out of bounds write in WebRTC in Google Chrome prior to 96.0.4664.93 allowed a remote attacker to potentially exploit heap corruption via crafted WebRTC packets.

When was CVE-2021-4079 disclosed?

CVE-2021-4079 was first published in the National Vulnerability Database on December 23, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-4079 actively exploited?

CVE-2021-4079 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 80.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-4079?

CVE-2021-4079 has a CVSS v3 base score of 8.8 (NVD).

How do I remediate CVE-2021-4079?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-4079, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-4079

📅 Published

🔄 Last Modified

🔗 References (8)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-4079?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (8)

Frequently asked(5)

Related CVEs(same CWE)