CVE-2021-25487

HIGHNVD 7.39.0▲Trending — 4 sources updated this weekExploited in the wild

7.3

Lack of boundary checking of a buffer in set_skb_priv() of modem interface driver prior to SMR Oct-2021 Release 1 allows OOB read and it results in arbitrary code execution by dereference of invalid function pointer.

CVSS v3: 7.3
EG Score: 9.0(high)
EPSS: 85.8%
KEV: ⚠ Exploited

Published

October 6, 2021

Last Modified

October 30, 2025

Advisory Details (2)

Auto-updated Jun 6, 2026

⚠️ Active exploitation confirmed. Patch available. Sources: cisa.

cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-25487

generic

Samsung Mobile Security

https://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-125Out-of-bounds Read

Data Freshness Timeline

(refreshed 20× 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.

2026-06-07 10:24 UTCEG score recompute
2026-06-07 10:24 UTCGHSA enrichment
2026-06-07 06:21 UTCEG score recompute
2026-06-07 06:21 UTCGHSA enrichment
2026-06-07 02:17 UTCEG score recompute
2026-06-07 02:17 UTCGHSA enrichment
2026-06-06 22:13 UTCEG score recompute
2026-06-06 22:13 UTCGHSA enrichment
2026-06-06 18:09 UTCEG score recompute
2026-06-06 18:09 UTCGHSA enrichment
2026-06-06 14:05 UTCEG score recompute
2026-06-06 14:05 UTCGHSA enrichment
2026-06-06 13:46 UTCepss_batch
2026-06-06 13:46 UTCepss_batch
2026-06-06 13:46 UTCepss_batch
2026-06-06 10:02 UTCEG score recompute
2026-06-06 10:01 UTCGHSA enrichment
2026-06-06 05:58 UTCEG score recompute
2026-06-06 05:58 UTCGHSA enrichment
2026-06-06 01:54 UTCEG score recompute

Frequently asked(6)

What is CVE-2021-25487?

CVE-2021-25487 is a high vulnerability published on October 6, 2021. Lack of boundary checking of a buffer in setskbpriv() of modem interface driver prior to SMR Oct-2021 Release 1 allows OOB read and it results in arbitrary code execution by dereference of invalid function pointer.

When was CVE-2021-25487 disclosed?

CVE-2021-25487 was first published in the National Vulnerability Database on October 6, 2021, with the most recent update on October 30, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-25487 actively exploited?

Yes. CISA added CVE-2021-25487 to the Known Exploited Vulnerabilities catalog on June 29, 2023, affecting Samsung Mobile Devices. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.

What is the CVSS score of CVE-2021-25487?

CVE-2021-25487 has a CVSS v3 base score of 7.3 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.

Which products are affected by CVE-2021-25487?

CVE-2021-25487 affects Samsung Mobile Devices. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.

How do I remediate CVE-2021-25487?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-25487, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-25487

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CVE-2021-25487

📅 Published

🔄 Last Modified

📋 Advisory Details (2)