CVE-2025-21043

CRITICALNVD 8.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2025-10-02), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 8.8 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
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 2%CVSS: 8.8Exploit: cisa kev · ssvc activeExposed: 0

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

Out-of-bounds write in libimagecodec.quram.so prior to SMR Sep-2025 Release 1 allows remote attackers to execute arbitrary code.

CVSS v3
8.8
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 PROB
2%
EPSS %ILE
81%
KEV
⚠ Exploited

Published

September 12, 2025

Last Modified

October 30, 2025

Advisory Details (2)

Auto-updated Jun 1, 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-2025-21043
generic🔴 Active Exploitation

Samsung Mobile Security

https://security.samsungmobile.com/securityUpdate.smsb?year=2025&month=09

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 63× in last 7d / 270× 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 1,025 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2025-21043?
CVE-2025-21043 is a critical vulnerability published on September 12, 2025. Out-of-bounds write in libimagecodec.quram.so prior to SMR Sep-2025 Release 1 allows remote attackers to execute arbitrary code.
When was CVE-2025-21043 disclosed?
CVE-2025-21043 was first published in the National Vulnerability Database on September 12, 2025, 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-2025-21043 actively exploited?
Yes. CISA added CVE-2025-21043 to the Known Exploited Vulnerabilities catalog on October 2, 2025, 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-2025-21043?
CVE-2025-21043 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2025-21043?
CVE-2025-21043 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-2025-21043?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-21043, 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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