CVE-2026-76888

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 92% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: Elevated riskExposed: 0

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

RDP protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
50(Track)
EG Risk 50/100SSVC: 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
Severity75% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
8%
KEV
Not listed

Published

August 19, 2026

Last Modified

September 17, 2026

Advisory Details (2)

Auto-updated Aug 28, 2026
No patch confirmed yet.
generic

RDP8/ZGFX decompressor: off-by-one heap overflow in zgfx_write_literal() (outputSegment[65536]) (ANT-2026-05VXN1Y6) (#21396) · Issues · Wireshark Foundation / Wireshark · GitLab

https://gitlab.com/wireshark/wireshark/-/work_items/21396
generic

Wireshark • Go Deep | Wireshark • wnpa-sec-2026-67 RDP protocol dissector crash

https://www.wireshark.org/security/wnpa-sec-2026-67.html

Vendor Advisories for CVE-2026-76888(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 rangeFixed inDependents
wireshark4.0.10-1 ... 4.6.6-2 (50 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
wireshark4.4.13-0+deb13u1 ... 4.4.9-1 (7 versions)4.4.18-0+deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
wireshark4.4.7-1 ... 4.6.6-2 (16 versions)——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 24× in last 7d / 93× 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 102 total refreshes for this CVE.

  1. 2026-09-21 01:46 UTCEG score recompute
  2. 2026-09-21 01:46 UTCGHSA enrichment
  3. 2026-09-20 20:16 UTCEPSS rescore
  4. 2026-09-20 12:37 UTCGHSA enrichment
  5. 2026-09-19 23:40 UTCEG score recompute
  6. 2026-09-19 23:39 UTCGHSA enrichment
  7. 2026-09-19 10:46 UTCGHSA enrichment
  8. 2026-09-18 21:41 UTCEG score recompute
  9. 2026-09-18 21:41 UTCGHSA enrichment
  10. 2026-09-18 19:28 UTCEPSS rescore
  11. 2026-09-18 07:59 UTCEG score recompute
  12. 2026-09-18 07:59 UTCGHSA enrichment
  13. 2026-09-17 19:05 UTCGHSA enrichment
  14. 2026-09-17 03:51 UTCGHSA enrichment
  15. 2026-09-16 14:57 UTCEG score recompute
  16. 2026-09-16 14:57 UTCGHSA enrichment
  17. 2026-09-16 14:08 UTCEPSS rescore
  18. 2026-09-16 05:15 UTCEPSS rescore
  19. 2026-09-16 01:52 UTCGHSA enrichment
  20. 2026-09-15 12:58 UTCEG score recompute
  21. 2026-09-15 12:58 UTCGHSA enrichment
  22. 2026-09-15 03:12 UTCEPSS rescore
  23. 2026-09-15 00:04 UTCGHSA enrichment
  24. 2026-09-14 11:10 UTCGHSA enrichment
  25. 2026-09-13 22:17 UTCEG score recompute
Show 75 more
  1. 2026-09-13 22:17 UTCGHSA enrichment
  2. 2026-09-13 09:23 UTCGHSA enrichment
  3. 2026-09-12 20:28 UTCEG score recompute
  4. 2026-09-12 20:28 UTCGHSA enrichment
  5. 2026-09-12 15:02 UTCEPSS rescore
  6. 2026-09-12 07:33 UTCGHSA enrichment
  7. 2026-09-11 18:38 UTCEG score recompute
  8. 2026-09-11 18:38 UTCGHSA enrichment
  9. 2026-09-11 14:53 UTCEPSS rescore
  10. 2026-09-11 05:44 UTCGHSA enrichment
  11. 2026-09-10 16:50 UTCEG score recompute
  12. 2026-09-10 16:50 UTCGHSA enrichment
  13. 2026-09-10 09:35 UTCEPSS rescore
  14. 2026-09-10 03:57 UTCGHSA enrichment
  15. 2026-09-09 15:02 UTCGHSA enrichment
  16. 2026-09-09 02:08 UTCGHSA enrichment
  17. 2026-09-08 06:26 UTCGHSA enrichment
  18. 2026-09-07 17:32 UTCEG score recompute
  19. 2026-09-07 17:32 UTCGHSA enrichment
  20. 2026-09-07 04:39 UTCGHSA enrichment
  21. 2026-09-06 15:45 UTCEG score recompute
  22. 2026-09-06 15:45 UTCGHSA enrichment
  23. 2026-09-06 13:48 UTCEPSS rescore
  24. 2026-09-06 02:51 UTCEG score recompute
  25. 2026-09-06 02:51 UTCGHSA enrichment
  26. 2026-09-05 13:57 UTCGHSA enrichment
  27. 2026-09-05 00:58 UTCEG score recompute
  28. 2026-09-05 00:58 UTCGHSA enrichment
  29. 2026-09-04 11:58 UTCEG score recompute
  30. 2026-09-04 11:58 UTCGHSA enrichment
  31. 2026-09-04 05:07 UTCEPSS rescore
  32. 2026-09-03 23:04 UTCGHSA enrichment
  33. 2026-09-03 10:08 UTCGHSA enrichment
  34. 2026-09-02 21:13 UTCEG score recompute
  35. 2026-09-02 21:13 UTCGHSA enrichment
  36. 2026-09-02 14:12 UTCEPSS rescore
  37. 2026-09-02 05:14 UTCGHSA enrichment
  38. 2026-09-01 16:20 UTCEG score recompute
  39. 2026-09-01 16:20 UTCGHSA enrichment
  40. 2026-09-01 13:54 UTCEPSS rescore
  41. 2026-09-01 04:40 UTCEPSS rescore
  42. 2026-09-01 04:40 UTCEPSS rescore
  43. 2026-09-01 03:06 UTCGHSA enrichment
  44. 2026-08-31 14:10 UTCGHSA enrichment
  45. 2026-08-31 00:22 UTCEG score recompute
  46. 2026-08-31 00:22 UTCGHSA enrichment
  47. 2026-08-30 19:18 UTCEPSS rescore
  48. 2026-08-30 19:17 UTCEPSS rescore
  49. 2026-08-30 11:28 UTCEG score recompute
  50. 2026-08-30 11:28 UTCGHSA enrichment
  51. 2026-08-30 01:22 UTCEPSS rescore
  52. 2026-08-29 22:34 UTCGHSA enrichment
  53. 2026-08-29 09:40 UTCEG score recompute
  54. 2026-08-29 09:40 UTCGHSA enrichment
  55. 2026-08-28 21:42 UTCEPSS rescore
  56. 2026-08-28 20:46 UTCEG score recompute▲ 4.40
  57. 2026-08-28 20:45 UTCGHSA enrichment
  58. 2026-08-28 20:44 UTCNVD updateCVSS v3 → 7.5 · severity → HIGH
  59. 2026-08-28 15:54 UTCEG score recompute
  60. 2026-08-28 15:54 UTCGHSA enrichment
  61. 2026-08-27 14:25 UTCEPSS rescore
  62. 2026-08-27 03:41 UTCEG score recompute
  63. 2026-08-27 03:41 UTCGHSA enrichment
  64. 2026-08-26 14:47 UTCEPSS rescore
  65. 2026-08-25 13:49 UTCEPSS rescore
  66. 2026-08-24 14:18 UTCEPSS rescore
  67. 2026-08-23 22:08 UTCEG score recompute
  68. 2026-08-23 22:08 UTCGHSA enrichment
  69. 2026-08-21 23:49 UTCEPSS rescore
  70. 2026-08-20 22:56 UTCEPSS rescore
  71. 2026-08-20 16:34 UTCEG score recompute
  72. 2026-08-20 16:34 UTCGHSA enrichment
  73. 2026-08-20 15:27 UTCEG score recompute
  74. 2026-08-20 15:27 UTCGHSA enrichment
  75. 2026-08-19 23:20 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-76888?
CVE-2026-76888 is a high vulnerability published on August 19, 2026. RDP protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
When was CVE-2026-76888 disclosed?
CVE-2026-76888 was first published in the National Vulnerability Database 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-2026-76888 actively exploited?
CVE-2026-76888 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 91.6% of all scored CVEs.
What is the CVSS score of CVE-2026-76888?
CVE-2026-76888 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-76888?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-76888, 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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