CVE-2026-76883

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.5 under NVD CVSS v3. EPSS exploit probability: 0.1% (2nd percentile of EPSS-scored CVEs). GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 3 sources updated this weekElevated
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 5.5Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

Catapult DCT2000 file parser crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service

CVSS v3
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
41
EG Risk 41/100CISA SSVC

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%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.1%
EPSS %ILE
2nd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 19, 2026

Last Modified

September 17, 2026

Advisory Details (2)

Auto-updated Aug 19, 2026
Patch available.
generic

Heap OOB write in wiretap/catapult_dct2000.c:1382 - off-by-one in DCT2000 file reader (#21427) · Issues · Wireshark Foundation / Wireshark · GitLab

https://gitlab.com/wireshark/wireshark/-/work_items/21427
generic

Wireshark • Go Deep | Wireshark • wnpa-sec-2026-74 Catapult DCT2000 file parser crash

https://www.wireshark.org/security/wnpa-sec-2026-74.html

Vendor Advisories for CVE-2026-76883(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
wireshark4.0.10-1 ... 4.6.6-2 (50 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
wireshark4.4.13-0+deb13u1 ... 4.4.9-1 (7 versions)
  • every version up to 4.4.18-0+deb13u1: fixed in 4.4.18-0+deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
wireshark4.4.7-1 ... 4.6.6-2 (16 versions)
  • every version on: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 67× 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 117 total refreshes for this CVE.

  1. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-04 21:21 UTCGHSA enrichment
  3. 2026-10-03 16:51 UTCEG score recompute
  4. 2026-10-03 16:51 UTCGHSA enrichment
  5. 2026-10-03 14:26 UTCEPSS rescore
  6. 2026-10-02 11:06 UTCEG score recompute
  7. 2026-10-02 11:06 UTCGHSA enrichment
  8. 2026-10-01 19:50 UTCEPSS rescore
  9. 2026-10-01 09:31 UTCEG score recompute
  10. 2026-10-01 09:31 UTCGHSA enrichment
  11. 2026-09-30 08:28 UTCGHSA enrichment
  12. 2026-09-29 06:20 UTCEG score recompute
  13. 2026-09-29 06:20 UTCGHSA enrichment
  14. 2026-09-28 13:52 UTCEPSS rescore
  15. 2026-09-28 05:17 UTCEG score recompute
  16. 2026-09-28 05:17 UTCGHSA enrichment
  17. 2026-09-27 13:48 UTCEPSS rescore
  18. 2026-09-27 04:15 UTCEG score recompute
  19. 2026-09-27 04:15 UTCGHSA enrichment
  20. 2026-09-26 15:59 UTCEPSS rescore
  21. 2026-09-26 00:28 UTCEPSS rescore
  22. 2026-09-25 03:59 UTCEG score recompute
  23. 2026-09-25 03:59 UTCGHSA enrichment
  24. 2026-09-24 14:04 UTCEPSS rescore
  25. 2026-09-24 02:56 UTCGHSA enrichment
Show 75 more
  1. 2026-09-23 01:53 UTCEG score recompute
  2. 2026-09-23 01:53 UTCGHSA enrichment
  3. 2026-09-22 16:01 UTCEPSS rescore
  4. 2026-09-22 00:49 UTCEG score recompute
  5. 2026-09-22 00:49 UTCGHSA enrichment
  6. 2026-09-21 21:09 UTCEPSS rescore
  7. 2026-09-20 23:46 UTCEG score recompute
  8. 2026-09-20 23:46 UTCGHSA enrichment
  9. 2026-09-20 20:16 UTCEPSS rescore
  10. 2026-09-19 22:43 UTCEG score recompute
  11. 2026-09-19 22:43 UTCGHSA enrichment
  12. 2026-09-18 21:41 UTCEG score recompute
  13. 2026-09-18 21:41 UTCGHSA enrichment
  14. 2026-09-18 19:28 UTCEPSS rescore
  15. 2026-09-17 19:08 UTCGHSA enrichment
  16. 2026-09-17 13:32 UTCEG score recompute
  17. 2026-09-17 13:32 UTCGHSA enrichment
  18. 2026-09-16 14:08 UTCEPSS rescore
  19. 2026-09-16 12:20 UTCEG score recompute
  20. 2026-09-16 12:20 UTCGHSA enrichment
  21. 2026-09-16 05:15 UTCEPSS rescore
  22. 2026-09-15 11:17 UTCEG score recompute
  23. 2026-09-15 11:17 UTCGHSA enrichment
  24. 2026-09-15 03:12 UTCEPSS rescore
  25. 2026-09-14 10:07 UTCGHSA enrichment
  26. 2026-09-13 09:03 UTCGHSA enrichment
  27. 2026-09-12 08:00 UTCEG score recompute
  28. 2026-09-12 08:00 UTCGHSA enrichment
  29. 2026-09-11 14:53 UTCEPSS rescore
  30. 2026-09-11 06:57 UTCEG score recompute
  31. 2026-09-11 06:57 UTCGHSA enrichment
  32. 2026-09-10 09:35 UTCEPSS rescore
  33. 2026-09-10 05:54 UTCGHSA enrichment
  34. 2026-09-09 04:51 UTCEG score recompute
  35. 2026-09-09 04:51 UTCGHSA enrichment
  36. 2026-09-08 22:01 UTCEPSS rescore
  37. 2026-09-08 03:49 UTCGHSA enrichment
  38. 2026-09-07 02:46 UTCEG score recompute
  39. 2026-09-07 02:45 UTCGHSA enrichment
  40. 2026-09-06 13:48 UTCEPSS rescore
  41. 2026-09-06 01:00 UTCEG score recompute
  42. 2026-09-06 01:00 UTCGHSA enrichment
  43. 2026-09-04 23:53 UTCEG score recompute
  44. 2026-09-04 23:53 UTCGHSA enrichment
  45. 2026-09-04 05:07 UTCEPSS rescore
  46. 2026-09-03 22:48 UTCGHSA enrichment
  47. 2026-09-02 21:43 UTCEG score recompute
  48. 2026-09-02 21:43 UTCGHSA enrichment
  49. 2026-09-02 14:12 UTCEPSS rescore
  50. 2026-09-01 20:36 UTCEG score recompute
  51. 2026-09-01 20:36 UTCGHSA enrichment
  52. 2026-09-01 13:54 UTCEPSS rescore
  53. 2026-09-01 04:40 UTCEPSS rescore
  54. 2026-09-01 04:40 UTCEPSS rescore
  55. 2026-08-31 19:33 UTCEG score recompute▲ 0.80
  56. 2026-08-31 19:33 UTCGHSA enrichment
  57. 2026-08-31 19:20 UTCNVD updateCVSS v3 → 5.5
  58. 2026-08-30 18:56 UTCEG score recompute
  59. 2026-08-30 18:56 UTCGHSA enrichment
  60. 2026-08-30 01:22 UTCEPSS rescore
  61. 2026-08-29 17:53 UTCEG score recompute
  62. 2026-08-29 17:53 UTCGHSA enrichment
  63. 2026-08-28 21:42 UTCEPSS rescore
  64. 2026-08-28 15:54 UTCGHSA enrichment
  65. 2026-08-27 22:52 UTCEG score recompute
  66. 2026-08-27 22:52 UTCGHSA enrichment
  67. 2026-08-27 14:25 UTCEPSS rescore
  68. 2026-08-26 21:50 UTCEG score recompute
  69. 2026-08-26 21:49 UTCGHSA enrichment
  70. 2026-08-26 14:47 UTCEPSS rescore
  71. 2026-08-25 20:42 UTCEG score recompute
  72. 2026-08-25 20:41 UTCGHSA enrichment
  73. 2026-08-25 13:49 UTCEPSS rescore
  74. 2026-08-24 19:38 UTCEG score recompute
  75. 2026-08-24 19:38 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-76883?
CVE-2026-76883 is a medium vulnerability published on August 19, 2026. Catapult DCT2000 file parser crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
When was CVE-2026-76883 disclosed?
CVE-2026-76883 was first published on August 19, 2026, with the most recent update on September 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-76883 actively exploited?
CVE-2026-76883 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (2nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-76883?
CVE-2026-76883 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-76883?
A fix for CVE-2026-76883 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-76883 are linked in the Vendor Advisories panel on this page.

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