CVE-2025-55643

MEDIUMPre-NVD 5.55.5—
EchelonGraph scoreHIGH 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
Trending — 3 sources updated this week
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 NULL pointer dereference in the TrackWriter handling component (filters/mux_isom.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(high)
EPSS
8.6%
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-2025-55643: NULL Pointer Dereference in GPAC/MP4Box via TrackWriter handling on crafted MP4 with malformed mvcC/stsz metadata during DASH segmentation

http://www.openwall.com/lists/oss-security/2026/06/13/5
generic

sigdevel: "Security Advisory: CVE-2025-55643 - NULL Pointer …" - Infosec Exchange

https://infosec.exchange/@sigdevel/116736819671963019

Vendor Advisories for CVE-2025-55643(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 22× in last 7d / 72× 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. 2026-07-07 00:42 UTCEG score recompute
  2. 2026-07-07 00:42 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 02:23 UTCEPSS rescore
  6. 2026-07-06 02:23 UTCEPSS rescore
  7. 2026-07-05 09:33 UTCEG score recompute
  8. 2026-07-05 09:33 UTCGHSA enrichment
  9. 2026-07-05 02:30 UTCEPSS rescore
  10. 2026-07-04 10:17 UTCEG score recompute
  11. 2026-07-04 10:17 UTCGHSA enrichment
  12. 2026-07-04 06:30 UTCEPSS rescore
  13. 2026-07-03 07:26 UTCEG score recompute
  14. 2026-07-03 07:25 UTCGHSA enrichment
  15. 2026-07-02 17:01 UTCEPSS rescore
  16. 2026-07-02 07:15 UTCEG score recompute
  17. 2026-07-02 07:15 UTCGHSA enrichment
  18. 2026-07-01 15:06 UTCEPSS rescore
  19. 2026-07-01 07:52 UTCEG score recompute
  20. 2026-07-01 07:52 UTCGHSA enrichment
  21. 2026-06-30 08:44 UTCEG score recompute
  22. 2026-06-30 08:44 UTCGHSA enrichment
  23. 2026-06-29 14:06 UTCEPSS rescore
  24. 2026-06-29 14:06 UTCEPSS rescore
  25. 2026-06-29 09:28 UTCEG score recompute
Show 47 more
  1. 2026-06-29 09:28 UTCGHSA enrichment
  2. 2026-06-28 14:07 UTCEPSS rescore
  3. 2026-06-28 14:07 UTCEPSS rescore
  4. 2026-06-28 10:20 UTCEG score recompute
  5. 2026-06-28 10:19 UTCGHSA enrichment
  6. 2026-06-28 04:55 UTCEPSS rescore
  7. 2026-06-27 11:09 UTCEG score recompute
  8. 2026-06-27 11:09 UTCGHSA enrichment
  9. 2026-06-27 03:08 UTCEPSS rescore
  10. 2026-06-27 03:08 UTCEPSS rescore
  11. 2026-06-26 12:01 UTCEG score recompute
  12. 2026-06-26 12:01 UTCGHSA enrichment
  13. 2026-06-25 13:49 UTCEPSS rescore
  14. 2026-06-25 12:31 UTCEG score recompute
  15. 2026-06-25 12:31 UTCGHSA enrichment
  16. 2026-06-24 14:04 UTCEPSS rescore
  17. 2026-06-24 14:04 UTCEPSS rescore
  18. 2026-06-24 13:23 UTCEG score recompute
  19. 2026-06-24 13:23 UTCGHSA enrichment
  20. 2026-06-23 21:32 UTCEPSS rescore
  21. 2026-06-23 13:01 UTCEG score recompute
  22. 2026-06-23 13:01 UTCGHSA enrichment
  23. 2026-06-22 14:25 UTCEPSS rescore
  24. 2026-06-22 13:16 UTCEG score recompute
  25. 2026-06-22 13:15 UTCGHSA enrichment
  26. 2026-06-21 14:56 UTCEPSS rescore
  27. 2026-06-21 14:56 UTCEPSS rescore
  28. 2026-06-21 14:07 UTCEG score recompute
  29. 2026-06-21 14:07 UTCGHSA enrichment
  30. 2026-06-21 01:59 UTCEPSS rescore
  31. 2026-06-21 01:59 UTCEPSS rescore
  32. 2026-06-20 14:37 UTCEG score recompute
  33. 2026-06-20 14:37 UTCGHSA enrichment
  34. 2026-06-19 19:25 UTCEPSS rescore
  35. 2026-06-19 19:25 UTCEPSS rescore
  36. 2026-06-19 15:27 UTCEG score recompute
  37. 2026-06-19 15:27 UTCGHSA enrichment
  38. 2026-06-18 17:52 UTCEPSS rescore
  39. 2026-06-18 17:52 UTCEPSS rescore
  40. 2026-06-18 16:19 UTCEG score recompute▲ 5.50
  41. 2026-06-18 16:19 UTCGHSA enrichment
  42. 2026-06-17 17:52 UTCEPSS rescore
  43. 2026-06-16 17:52 UTCEPSS rescore
  44. 2026-06-16 17:52 UTCEPSS rescore
  45. 2026-06-15 20:38 UTCMITRE cvelistV5CVSS v3 → 5.5 · severity → MEDIUM
  46. 2026-06-15 19:24 UTCEG score recompute
  47. 2026-06-15 19:19 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2025-55643?
CVE-2025-55643 is a medium vulnerability published on June 15, 2026. A NULL pointer dereference in the TrackWriter handling component (filters/mux_isom.c) of GPAC MP4Box v2.4 allows attackers to cause a Denial of Service (DoS) via supplying a crafted MP4 file.
When was CVE-2025-55643 disclosed?
CVE-2025-55643 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-2025-55643 actively exploited?
CVE-2025-55643 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 8.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-55643?
CVE-2025-55643 has a CVSS v3.1 base score of 5.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2025-55643?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-55643, 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-2025-55643

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