CVE-2021-25487

HIGHNVD 7.39.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2023-06-29), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 7.3 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
7.3
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 1%CVSS: 7.3Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

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 computed
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS
44.9%
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.

Data Freshness Timeline

(refreshed 49× in last 7d / 228× 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.

Showing the most recent 100 of 444 total refreshes for this CVE.

  1. 2026-07-24 14:15 UTCEPSS rescore
  2. 2026-07-23 14:16 UTCEPSS rescore
  3. 2026-07-23 01:58 UTCEG score recompute
  4. 2026-07-22 21:42 UTCEG score recompute
  5. 2026-07-22 21:42 UTCGHSA enrichment
  6. 2026-07-22 19:40 UTCCISA KEV update
  7. 2026-07-22 17:17 UTCEG score recompute
  8. 2026-07-22 17:17 UTCGHSA enrichment
  9. 2026-07-22 14:06 UTCEPSS rescore
  10. 2026-07-22 14:06 UTCEPSS rescore
  11. 2026-07-22 13:12 UTCGHSA enrichment
  12. 2026-07-22 09:08 UTCGHSA enrichment
  13. 2026-07-22 05:04 UTCGHSA enrichment
  14. 2026-07-22 01:00 UTCGHSA enrichment
  15. 2026-07-21 20:53 UTCGHSA enrichment
  16. 2026-07-21 16:50 UTCEG score recompute
  17. 2026-07-21 16:49 UTCGHSA enrichment
  18. 2026-07-21 15:22 UTCEPSS rescore
  19. 2026-07-21 15:22 UTCEPSS rescore
  20. 2026-07-21 14:37 UTCCISA KEV update
  21. 2026-07-21 12:46 UTCGHSA enrichment
  22. 2026-07-21 08:41 UTCGHSA enrichment
  23. 2026-07-21 04:36 UTCGHSA enrichment
  24. 2026-07-21 00:32 UTCGHSA enrichment
  25. 2026-07-20 20:28 UTCEG score recompute
Show 75 more
  1. 2026-07-20 20:28 UTCGHSA enrichment
  2. 2026-07-20 17:05 UTCEPSS rescore
  3. 2026-07-20 16:24 UTCGHSA enrichment
  4. 2026-07-20 12:20 UTCGHSA enrichment
  5. 2026-07-20 08:14 UTCGHSA enrichment
  6. 2026-07-20 04:11 UTCGHSA enrichment
  7. 2026-07-20 00:07 UTCGHSA enrichment
  8. 2026-07-19 20:03 UTCGHSA enrichment
  9. 2026-07-19 15:57 UTCEG score recompute
  10. 2026-07-19 15:57 UTCGHSA enrichment
  11. 2026-07-19 14:28 UTCEPSS rescore
  12. 2026-07-19 11:53 UTCGHSA enrichment
  13. 2026-07-19 07:49 UTCGHSA enrichment
  14. 2026-07-19 03:45 UTCEG score recompute
  15. 2026-07-19 03:45 UTCGHSA enrichment
  16. 2026-07-19 02:27 UTCEPSS rescore
  17. 2026-07-19 02:27 UTCEPSS rescore
  18. 2026-07-18 23:41 UTCGHSA enrichment
  19. 2026-07-18 19:37 UTCGHSA enrichment
  20. 2026-07-18 15:33 UTCGHSA enrichment
  21. 2026-07-18 11:30 UTCEG score recompute
  22. 2026-07-18 11:30 UTCGHSA enrichment
  23. 2026-07-18 10:02 UTCEPSS rescore
  24. 2026-07-18 10:02 UTCEPSS rescore
  25. 2026-07-18 07:26 UTCGHSA enrichment
  26. 2026-07-18 03:22 UTCGHSA enrichment
  27. 2026-07-17 23:18 UTCGHSA enrichment
  28. 2026-07-17 19:14 UTCGHSA enrichment
  29. 2026-07-17 15:10 UTCGHSA enrichment
  30. 2026-07-17 11:06 UTCGHSA enrichment
  31. 2026-07-17 07:02 UTCGHSA enrichment
  32. 2026-07-17 02:58 UTCGHSA enrichment
  33. 2026-07-16 22:54 UTCGHSA enrichment
  34. 2026-07-16 18:50 UTCGHSA enrichment
  35. 2026-07-16 17:04 UTCCISA KEV update
  36. 2026-07-16 17:00 UTCEPSS rescore
  37. 2026-07-16 14:45 UTCGHSA enrichment
  38. 2026-07-16 10:40 UTCGHSA enrichment
  39. 2026-07-16 06:34 UTCGHSA enrichment
  40. 2026-07-16 02:28 UTCGHSA enrichment
  41. 2026-07-15 22:25 UTCGHSA enrichment
  42. 2026-07-15 18:21 UTCGHSA enrichment
  43. 2026-07-15 16:55 UTCEPSS rescore
  44. 2026-07-15 16:55 UTCEPSS rescore
  45. 2026-07-15 16:49 UTCCISA KEV update
  46. 2026-07-15 15:04 UTCCISA KEV update
  47. 2026-07-15 14:17 UTCGHSA enrichment
  48. 2026-07-15 10:11 UTCGHSA enrichment
  49. 2026-07-15 06:07 UTCGHSA enrichment
  50. 2026-07-15 02:03 UTCGHSA enrichment
  51. 2026-07-15 01:58 UTCEPSS rescore
  52. 2026-07-14 21:59 UTCGHSA enrichment
  53. 2026-07-14 18:05 UTCCISA KEV update
  54. 2026-07-14 17:54 UTCGHSA enrichment
  55. 2026-07-14 13:49 UTCGHSA enrichment
  56. 2026-07-14 09:45 UTCGHSA enrichment
  57. 2026-07-14 05:41 UTCGHSA enrichment
  58. 2026-07-14 01:37 UTCGHSA enrichment
  59. 2026-07-13 22:27 UTCEPSS rescore
  60. 2026-07-13 22:27 UTCEPSS rescore
  61. 2026-07-13 21:33 UTCGHSA enrichment
  62. 2026-07-13 17:29 UTCGHSA enrichment
  63. 2026-07-13 17:07 UTCCISA KEV update
  64. 2026-07-13 13:25 UTCGHSA enrichment
  65. 2026-07-13 09:21 UTCGHSA enrichment
  66. 2026-07-13 06:10 UTCEPSS rescore
  67. 2026-07-13 05:16 UTCGHSA enrichment
  68. 2026-07-13 01:12 UTCGHSA enrichment
  69. 2026-07-12 21:08 UTCGHSA enrichment
  70. 2026-07-12 17:04 UTCGHSA enrichment
  71. 2026-07-12 12:59 UTCGHSA enrichment
  72. 2026-07-12 08:55 UTCGHSA enrichment
  73. 2026-07-12 05:44 UTCEPSS rescore
  74. 2026-07-12 05:44 UTCEPSS rescore
  75. 2026-07-12 04:51 UTCGHSA enrichment

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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.

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