CVE-2025-62821

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-19. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.1Exploit: None knownExposed: 0

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

Microsoft HEIF Image Extensions 1.2.22.0 has an out-of-bounds read because CHEIFItemInfoEntry_GetDataSize can return success while leaving the reported data size as 0. This causes a caller to make a 1-byte allocation. Later, CopyPixels computes copy_size = stride * abs(roi_height) but does not check the source buffer length before a memmove call.

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
46(Track)
EG Risk 46/100SSVC: Track

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
Severity91% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
62%
KEV
Not listed

Published

June 19, 2026

Last Modified

June 30, 2026

Advisory Details (1)

Auto-updated Sep 8, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

GitHub - hyunjungg/CVE-2025-62821: Microsoft HEIF Extension (msheif_store.dll) OOB-read · GitHub

https://github.com/hyunjungg/CVE-2025-62821

Vendor Advisories for CVE-2025-62821(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 90× 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 386 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2025-62821?
CVE-2025-62821 is a critical vulnerability published on June 19, 2026. Microsoft HEIF Image Extensions 1.2.22.0 has an out-of-bounds read because CHEIFItemInfoEntryGetDataSize can return success while leaving the reported data size as 0. This causes a caller to make a 1-byte allocation. Later, CopyPixels computes copysize = stride * abs(roi_height) but does not check…
When was CVE-2025-62821 disclosed?
CVE-2025-62821 was first published in the National Vulnerability Database on June 19, 2026, with the most recent update on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-62821 actively exploited?
CVE-2025-62821 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 37.6% of all scored CVEs.
What is the CVSS score of CVE-2025-62821?
CVE-2025-62821 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2025-62821?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-62821, 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

Explore the affected products and dependency analysis for CVE-2025-62821

Explore →

Is Your Infrastructure Affected by CVE-2025-62821?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs