CVE-2021-25490

MEDIUMNVD 6.06.0—

6.0

A keyblob downgrade attack in keymaster prior to SMR Oct-2021 Release 1 allows attacker to trigger IV reuse vulnerability with privileged process.

CVSS v3: 6.0
EG Score: 6.0(medium)
EPSS: 7.8%
KEV: Not listed

Published

October 6, 2021

Last Modified

November 21, 2024

References (2)

mobilehttps://security.samsungmobile.com/securityUpdate.smsb?year=2021&month=10
af854a3a-2127-422b-91ae-364da2661108https://security.samsungmobile.com/securityUpdate.smsb?year=2021&month=10

Weakness Classification(1)

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

CWE-287Improper Authentication

Data Freshness Timeline

(refreshed 14× in last 7d / 20× 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.

2026-06-05 22:45 UTCepss_batch
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2026-05-26 13:42 UTCepss_batch

Frequently asked(5)

What is CVE-2021-25490?

CVE-2021-25490 is a medium vulnerability published on October 6, 2021. A keyblob downgrade attack in keymaster prior to SMR Oct-2021 Release 1 allows attacker to trigger IV reuse vulnerability with privileged process.

When was CVE-2021-25490 disclosed?

CVE-2021-25490 was first published in the National Vulnerability Database on October 6, 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-2021-25490 actively exploited?

CVE-2021-25490 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 7.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-25490?

CVE-2021-25490 has a CVSS v3 base score of 6.0 (NVD).

How do I remediate CVE-2021-25490?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-25490, 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-2021-25490

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-25490?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (2)

Frequently asked(5)

Related CVEs(same CWE)