CVE-2025-62821

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreHIGH 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
Trending — 3 sources updated this week
9.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.1Exploit: NoneExposed: 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(high)
EPSS
52.9%
KEV
Not listed

Published

June 19, 2026

Last Modified

June 30, 2026

Advisory Details (1)

Auto-updated Jun 22, 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 89× in last 7d / 157× 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 157 total refreshes for this CVE.

  1. 2026-07-07 05:24 UTCEG score recompute
  2. 2026-07-07 05:23 UTCGHSA enrichment
  3. 2026-07-07 00:57 UTCEG score recompute
  4. 2026-07-07 00:57 UTCGHSA enrichment
  5. 2026-07-06 20:43 UTCEG score recompute
  6. 2026-07-06 20:42 UTCGHSA enrichment
  7. 2026-07-06 16:27 UTCEPSS rescore
  8. 2026-07-06 16:27 UTCEPSS rescore
  9. 2026-07-06 15:57 UTCEG score recompute
  10. 2026-07-06 15:56 UTCGHSA enrichment
  11. 2026-07-06 11:41 UTCEG score recompute
  12. 2026-07-06 11:40 UTCGHSA enrichment
  13. 2026-07-06 07:18 UTCEG score recompute
  14. 2026-07-06 07:18 UTCGHSA enrichment
  15. 2026-07-06 02:54 UTCEG score recompute
  16. 2026-07-06 02:54 UTCGHSA enrichment
  17. 2026-07-06 02:23 UTCEPSS rescore
  18. 2026-07-06 02:23 UTCEPSS rescore
  19. 2026-07-05 22:39 UTCEG score recompute
  20. 2026-07-05 22:39 UTCGHSA enrichment
  21. 2026-07-05 18:24 UTCEG score recompute
  22. 2026-07-05 18:24 UTCGHSA enrichment
  23. 2026-07-05 14:10 UTCEG score recompute
  24. 2026-07-05 14:09 UTCGHSA enrichment
  25. 2026-07-05 09:54 UTCEG score recompute
Show 75 more
  1. 2026-07-05 09:54 UTCGHSA enrichment
  2. 2026-07-05 05:39 UTCEG score recompute
  3. 2026-07-05 05:38 UTCGHSA enrichment
  4. 2026-07-05 02:30 UTCEPSS rescore
  5. 2026-07-05 02:30 UTCEPSS rescore
  6. 2026-07-05 01:22 UTCEG score recompute
  7. 2026-07-05 01:22 UTCGHSA enrichment
  8. 2026-07-04 21:07 UTCEG score recompute
  9. 2026-07-04 21:07 UTCGHSA enrichment
  10. 2026-07-04 16:53 UTCEG score recompute
  11. 2026-07-04 16:53 UTCGHSA enrichment
  12. 2026-07-04 12:18 UTCEG score recompute
  13. 2026-07-04 12:18 UTCGHSA enrichment
  14. 2026-07-04 07:50 UTCEG score recompute
  15. 2026-07-04 07:50 UTCGHSA enrichment
  16. 2026-07-04 06:31 UTCEPSS rescore
  17. 2026-07-04 06:30 UTCEPSS rescore
  18. 2026-07-04 02:41 UTCEG score recompute
  19. 2026-07-04 02:41 UTCGHSA enrichment
  20. 2026-07-03 22:17 UTCEG score recompute
  21. 2026-07-03 22:17 UTCGHSA enrichment
  22. 2026-07-03 18:02 UTCEG score recompute
  23. 2026-07-03 18:01 UTCGHSA enrichment
  24. 2026-07-03 13:43 UTCEG score recompute
  25. 2026-07-03 13:43 UTCGHSA enrichment
  26. 2026-07-03 09:28 UTCEG score recompute
  27. 2026-07-03 09:28 UTCGHSA enrichment
  28. 2026-07-03 05:13 UTCEG score recompute
  29. 2026-07-03 05:13 UTCGHSA enrichment
  30. 2026-07-03 00:57 UTCEG score recompute
  31. 2026-07-03 00:57 UTCGHSA enrichment
  32. 2026-07-02 20:43 UTCEG score recompute
  33. 2026-07-02 20:43 UTCGHSA enrichment
  34. 2026-07-02 16:27 UTCEG score recompute
  35. 2026-07-02 16:27 UTCGHSA enrichment
  36. 2026-07-02 12:12 UTCEG score recompute
  37. 2026-07-02 12:12 UTCGHSA enrichment
  38. 2026-07-02 07:56 UTCEG score recompute
  39. 2026-07-02 07:56 UTCGHSA enrichment
  40. 2026-07-02 03:41 UTCEG score recompute
  41. 2026-07-02 03:41 UTCGHSA enrichment
  42. 2026-07-01 23:26 UTCEG score recompute
  43. 2026-07-01 23:26 UTCGHSA enrichment
  44. 2026-07-01 19:11 UTCEG score recompute
  45. 2026-07-01 19:11 UTCGHSA enrichment
  46. 2026-07-01 15:06 UTCEPSS rescore
  47. 2026-07-01 15:06 UTCEPSS rescore
  48. 2026-07-01 14:57 UTCEG score recompute
  49. 2026-07-01 14:57 UTCGHSA enrichment
  50. 2026-07-01 10:42 UTCEG score recompute
  51. 2026-07-01 10:42 UTCGHSA enrichment
  52. 2026-07-01 06:27 UTCEG score recompute
  53. 2026-07-01 06:27 UTCGHSA enrichment
  54. 2026-07-01 02:12 UTCEG score recompute
  55. 2026-07-01 02:12 UTCGHSA enrichment
  56. 2026-06-30 23:22 UTCEPSS rescore
  57. 2026-06-30 21:57 UTCEG score recompute
  58. 2026-06-30 21:57 UTCGHSA enrichment
  59. 2026-06-30 17:42 UTCEG score recompute
  60. 2026-06-30 17:42 UTCGHSA enrichment
  61. 2026-06-30 13:27 UTCEG score recompute
  62. 2026-06-30 13:27 UTCGHSA enrichment
  63. 2026-06-30 09:12 UTCEG score recompute
  64. 2026-06-30 09:12 UTCGHSA enrichment
  65. 2026-06-30 04:57 UTCEG score recompute
  66. 2026-06-30 04:57 UTCGHSA enrichment
  67. 2026-06-30 00:30 UTCEG score recompute
  68. 2026-06-30 00:29 UTCGHSA enrichment
  69. 2026-06-29 20:15 UTCEG score recompute
  70. 2026-06-29 20:14 UTCGHSA enrichment
  71. 2026-06-29 15:59 UTCEG score recompute
  72. 2026-06-29 15:59 UTCGHSA enrichment
  73. 2026-06-29 14:06 UTCEPSS rescore
  74. 2026-06-29 14:06 UTCEPSS rescore
  75. 2026-06-29 11:44 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 52.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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

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