CVE-2021-21117

HIGHNVD 7.87.8—

7.8

Insufficient policy enforcement in Cryptohome in Google Chrome prior to 88.0.4324.96 allowed a local attacker to perform OS-level privilege escalation via a crafted file.

CVSS v3: 7.8
EG Score: 7.8(medium)
EPSS: 1.6%
KEV: Not listed

Published

February 9, 2021

Last Modified

November 21, 2024

References (4)

chrome-cve-admin@googlehttps://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop_19.html
chrome-cve-admin@googlehttps://crbug.com/1137179
af854a3a-2127-422b-91ae-364da2661108https://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop_19.html
af854a3a-2127-422b-91ae-364da2661108https://crbug.com/1137179

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 19× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-04 13:10 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 21:08 UTCEG score recompute
2026-05-26 21:08 UTCGHSA enrichment
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-24 16:49 UTCepss_batch
2026-05-23 10:01 UTCOSV refresh

Frequently asked(5)

What is CVE-2021-21117?

CVE-2021-21117 is a high vulnerability published on February 9, 2021. Insufficient policy enforcement in Cryptohome in Google Chrome prior to 88.0.4324.96 allowed a local attacker to perform OS-level privilege escalation via a crafted file.

When was CVE-2021-21117 disclosed?

CVE-2021-21117 was first published in the National Vulnerability Database on February 9, 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-2021-21117 actively exploited?

CVE-2021-21117 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-21117?

CVE-2021-21117 has a CVSS v3 base score of 7.8 (NVD).

How do I remediate CVE-2021-21117?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-21117, 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-2021-21117

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(3)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-21117?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (4)

Frequently asked(5)

Related CVEs(same CWE)