Race in V8 in Google Chrome prior to 95.0.4638.54 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
CVE-2021-37991
HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence
This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.8%, top 49% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, nvd
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.5
- EG Score
- 7.5(medium)
- EG Risk
- 39(Track)EG Risk 39/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity75% × 45%Exploitation1% × 40%Automatability30% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 1%
- EPSS %ILE
- 55%
- KEV
- Not listed
Published
November 2, 2021
Last Modified
November 21, 2024
References (6)
- chrome-cve-admin@googlehttps://chromereleases.googleblog.com/2021/10/stable-channel-update-for-desktop_19.html
- chrome-cve-admin@googlehttps://crbug.com/1250660
- chrome-cve-admin@googlehttps://www.debian.org/security/2022/dsa-5046
- af854a3a-2127-422b-91ae-364da2661108https://chromereleases.googleblog.com/2021/10/stable-channel-update-for-desktop_19.html
- af854a3a-2127-422b-91ae-364da2661108https://crbug.com/1250660
- af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2022/dsa-5046
Related CVEs
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Frequently asked(5)
What is CVE-2021-37991?
CVE-2021-37991 is a high vulnerability published on November 2, 2021. Race in V8 in Google Chrome prior to 95.0.4638.54 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
When was CVE-2021-37991 disclosed?
CVE-2021-37991 was first published in the National Vulnerability Database on November 2, 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-2021-37991 actively exploited?
CVE-2021-37991 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 45.4% of all scored CVEs.
What is the CVSS score of CVE-2021-37991?
CVE-2021-37991 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2021-37991?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-37991, 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
Explore the affected products and dependency analysis for CVE-2021-37991
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