CVE-2025-55645

MEDIUMPre-NVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-06-15. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.5Exploit: NoneExposed: 0

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

A heap buffer overflow in the gf_cenc_set_pssh function (isomedia/drm_sample.c) of GPAC MP4Box v2.4 allows attackers to cause a Denial of Service (DoS) via supplying a crafted MP4 file.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
25(Track)
EG Risk 25/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
20.7%
KEV
Not listed

Published

June 15, 2026

Last Modified

June 16, 2026

Advisory Details (2)

Auto-updated Jun 15, 2026
No patch confirmed yet.
generic

oss-security - CVE-2025-55645: Heap-based Buffer Overflow in GPAC/MP4Box via gf_cenc_set_pssh on crafted MP4 with oversized PSSH payload

http://www.openwall.com/lists/oss-security/2026/06/13/6
generic

sigdevel: "Security Advisory: CVE-2025-55645 - Heap Buffer O…" - Infosec Exchange

https://infosec.exchange/@sigdevel/116736802253007654

Vendor Advisories for CVE-2025-55645(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 11× in last 7d / 61× 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.

  1. 2026-07-24 14:17 UTCEPSS rescore
  2. 2026-07-23 14:18 UTCEPSS rescore
  3. 2026-07-23 02:59 UTCEG score recompute
  4. 2026-07-22 14:08 UTCEPSS rescore
  5. 2026-07-22 14:07 UTCEPSS rescore
  6. 2026-07-21 15:24 UTCEPSS rescore
  7. 2026-07-20 17:08 UTCEPSS rescore
  8. 2026-07-19 14:30 UTCEPSS rescore
  9. 2026-07-19 14:30 UTCEPSS rescore
  10. 2026-07-19 02:28 UTCEPSS rescore
  11. 2026-07-18 10:04 UTCEPSS rescore
  12. 2026-07-16 23:08 UTCGHSA enrichment
  13. 2026-07-16 17:02 UTCEPSS rescore
  14. 2026-07-15 15:58 UTCGHSA enrichment
  15. 2026-07-15 01:59 UTCEPSS rescore
  16. 2026-07-15 01:59 UTCEPSS rescore
  17. 2026-07-14 11:53 UTCGHSA enrichment
  18. 2026-07-13 22:29 UTCEPSS rescore
  19. 2026-07-13 09:36 UTCGHSA enrichment
  20. 2026-07-13 06:12 UTCEPSS rescore
  21. 2026-07-13 06:12 UTCEPSS rescore
  22. 2026-07-12 05:46 UTCEPSS rescore
  23. 2026-07-12 03:52 UTCGHSA enrichment
  24. 2026-07-11 08:27 UTCEPSS rescore
  25. 2026-07-11 08:27 UTCEPSS rescore
Show 60 more
  1. 2026-07-11 03:27 UTCGHSA enrichment
  2. 2026-07-10 03:09 UTCGHSA enrichment
  3. 2026-07-09 19:09 UTCEPSS rescore
  4. 2026-07-09 02:27 UTCGHSA enrichment
  5. 2026-07-08 15:15 UTCEPSS rescore
  6. 2026-07-08 01:01 UTCGHSA enrichment
  7. 2026-07-07 13:45 UTCEPSS rescore
  8. 2026-07-07 00:41 UTCGHSA enrichment
  9. 2026-07-06 16:27 UTCEPSS rescore
  10. 2026-07-06 16:27 UTCEPSS rescore
  11. 2026-07-06 02:23 UTCEPSS rescore
  12. 2026-07-06 02:23 UTCEPSS rescore
  13. 2026-07-05 20:30 UTCGHSA enrichment
  14. 2026-07-05 02:30 UTCEPSS rescore
  15. 2026-07-04 20:10 UTCGHSA enrichment
  16. 2026-07-04 06:30 UTCEPSS rescore
  17. 2026-07-03 19:51 UTCGHSA enrichment
  18. 2026-07-02 19:33 UTCGHSA enrichment
  19. 2026-07-02 17:01 UTCEPSS rescore
  20. 2026-07-01 19:15 UTCGHSA enrichment
  21. 2026-07-01 15:06 UTCEPSS rescore
  22. 2026-06-30 23:22 UTCEPSS rescore
  23. 2026-06-30 18:57 UTCGHSA enrichment
  24. 2026-06-29 18:39 UTCGHSA enrichment
  25. 2026-06-29 14:06 UTCEPSS rescore
  26. 2026-06-29 14:06 UTCEPSS rescore
  27. 2026-06-28 17:37 UTCGHSA enrichment
  28. 2026-06-28 14:07 UTCEPSS rescore
  29. 2026-06-28 14:07 UTCEPSS rescore
  30. 2026-06-28 04:55 UTCEPSS rescore
  31. 2026-06-27 17:15 UTCGHSA enrichment
  32. 2026-06-27 03:08 UTCEPSS rescore
  33. 2026-06-27 03:08 UTCEPSS rescore
  34. 2026-06-26 16:56 UTCGHSA enrichment
  35. 2026-06-25 16:38 UTCGHSA enrichment
  36. 2026-06-25 13:49 UTCEPSS rescore
  37. 2026-06-24 16:18 UTCGHSA enrichment
  38. 2026-06-24 14:04 UTCEPSS rescore
  39. 2026-06-24 14:04 UTCEPSS rescore
  40. 2026-06-23 21:32 UTCEPSS rescore
  41. 2026-06-23 16:00 UTCGHSA enrichment
  42. 2026-06-22 15:41 UTCGHSA enrichment
  43. 2026-06-22 14:25 UTCEPSS rescore
  44. 2026-06-21 15:08 UTCGHSA enrichment
  45. 2026-06-21 14:56 UTCEPSS rescore
  46. 2026-06-21 14:56 UTCEPSS rescore
  47. 2026-06-21 01:59 UTCEPSS rescore
  48. 2026-06-21 01:59 UTCEPSS rescore
  49. 2026-06-20 14:48 UTCGHSA enrichment
  50. 2026-06-19 19:25 UTCEPSS rescore
  51. 2026-06-19 19:25 UTCEPSS rescore
  52. 2026-06-19 14:27 UTCGHSA enrichment
  53. 2026-06-18 14:03 UTCEG score recompute▲ 5.50
  54. 2026-06-18 14:03 UTCGHSA enrichment
  55. 2026-06-17 17:52 UTCEPSS rescore
  56. 2026-06-16 17:52 UTCEPSS rescore
  57. 2026-06-16 17:52 UTCEPSS rescore
  58. 2026-06-15 20:38 UTCMITRE cvelistV5CVSS v3 → 5.5 · severity → MEDIUM
  59. 2026-06-15 19:23 UTCEG score recompute
  60. 2026-06-15 19:19 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2025-55645?
CVE-2025-55645 is a medium vulnerability published on June 15, 2026. A heap buffer overflow in the gfcencsetpssh function (isomedia/drmsample.c) of GPAC MP4Box v2.4 allows attackers to cause a Denial of Service (DoS) via supplying a crafted MP4 file.
When was CVE-2025-55645 disclosed?
CVE-2025-55645 was first published in the National Vulnerability Database on June 15, 2026, with the most recent update on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-55645 actively exploited?
CVE-2025-55645 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 20.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-55645?
CVE-2025-55645 has a CVSS v3.1 base score of 5.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2025-55645?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-55645, 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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