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% (10th 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
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.5Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

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
7.5HIGHmedium confidence
EG Risk
50
EG Risk 50/100CISA 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
Severity75% × 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
0.2%
EPSS %ILE
10th
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 28, 2026
Patch available.
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 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 22× in last 7d / 96× 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 148 total refreshes for this CVE.

  1. 2026-10-05 10:15 UTCEG score recompute
  2. 2026-10-05 10:15 UTCGHSA enrichment
  3. 2026-10-04 23:22 UTCEPSS rescore
  4. 2026-10-04 21:21 UTCGHSA enrichment
  5. 2026-10-04 05:58 UTCGHSA enrichment
  6. 2026-10-03 17:05 UTCEG score recompute
  7. 2026-10-03 17:05 UTCGHSA enrichment
  8. 2026-10-03 14:26 UTCEPSS rescore
  9. 2026-10-03 04:11 UTCEG score recompute
  10. 2026-10-03 04:11 UTCGHSA enrichment
  11. 2026-10-02 14:51 UTCGHSA enrichment
  12. 2026-10-02 01:21 UTCEG score recompute
  13. 2026-10-02 01:21 UTCGHSA enrichment
  14. 2026-10-01 19:50 UTCEPSS rescore
  15. 2026-10-01 10:15 UTCGHSA enrichment
  16. 2026-09-30 21:21 UTCEG score recompute
  17. 2026-09-30 21:21 UTCGHSA enrichment
  18. 2026-09-30 08:28 UTCEG score recompute
  19. 2026-09-30 08:28 UTCGHSA enrichment
  20. 2026-09-29 15:24 UTCEPSS rescore
  21. 2026-09-28 21:40 UTCEG score recompute
  22. 2026-09-28 21:40 UTCGHSA enrichment
  23. 2026-09-28 13:52 UTCEPSS rescore
  24. 2026-09-28 06:01 UTCGHSA enrichment
  25. 2026-09-27 17:08 UTCEG score recompute
Show 75 more
  1. 2026-09-27 17:08 UTCGHSA enrichment
  2. 2026-09-27 13:48 UTCEPSS rescore
  3. 2026-09-27 04:14 UTCEG score recompute
  4. 2026-09-27 04:14 UTCGHSA enrichment
  5. 2026-09-26 15:59 UTCEPSS rescore
  6. 2026-09-26 00:28 UTCEPSS rescore
  7. 2026-09-25 00:46 UTCEG score recompute
  8. 2026-09-25 00:46 UTCGHSA enrichment
  9. 2026-09-24 14:04 UTCEPSS rescore
  10. 2026-09-24 10:28 UTCGHSA enrichment
  11. 2026-09-23 21:34 UTCEG score recompute
  12. 2026-09-23 21:34 UTCGHSA enrichment
  13. 2026-09-23 17:54 UTCEPSS rescore
  14. 2026-09-23 08:41 UTCGHSA enrichment
  15. 2026-09-22 19:47 UTCEG score recompute
  16. 2026-09-22 19:47 UTCGHSA enrichment
  17. 2026-09-22 16:01 UTCEPSS rescore
  18. 2026-09-22 04:24 UTCEG score recompute
  19. 2026-09-22 04:24 UTCGHSA enrichment
  20. 2026-09-21 21:09 UTCEPSS rescore
  21. 2026-09-21 15:29 UTCGHSA enrichment
  22. 2026-09-21 01:46 UTCEG score recompute
  23. 2026-09-21 01:46 UTCGHSA enrichment
  24. 2026-09-20 20:16 UTCEPSS rescore
  25. 2026-09-20 12:37 UTCGHSA enrichment
  26. 2026-09-19 23:40 UTCEG score recompute
  27. 2026-09-19 23:39 UTCGHSA enrichment
  28. 2026-09-19 10:46 UTCGHSA enrichment
  29. 2026-09-18 21:41 UTCEG score recompute
  30. 2026-09-18 21:41 UTCGHSA enrichment
  31. 2026-09-18 19:28 UTCEPSS rescore
  32. 2026-09-18 07:59 UTCEG score recompute
  33. 2026-09-18 07:59 UTCGHSA enrichment
  34. 2026-09-17 19:05 UTCGHSA enrichment
  35. 2026-09-17 03:51 UTCGHSA enrichment
  36. 2026-09-16 14:57 UTCEG score recompute
  37. 2026-09-16 14:57 UTCGHSA enrichment
  38. 2026-09-16 14:08 UTCEPSS rescore
  39. 2026-09-16 05:15 UTCEPSS rescore
  40. 2026-09-16 01:52 UTCGHSA enrichment
  41. 2026-09-15 12:58 UTCEG score recompute
  42. 2026-09-15 12:58 UTCGHSA enrichment
  43. 2026-09-15 03:12 UTCEPSS rescore
  44. 2026-09-15 00:04 UTCGHSA enrichment
  45. 2026-09-14 11:10 UTCGHSA enrichment
  46. 2026-09-13 22:17 UTCEG score recompute
  47. 2026-09-13 22:17 UTCGHSA enrichment
  48. 2026-09-13 09:23 UTCGHSA enrichment
  49. 2026-09-12 20:28 UTCEG score recompute
  50. 2026-09-12 20:28 UTCGHSA enrichment
  51. 2026-09-12 15:02 UTCEPSS rescore
  52. 2026-09-12 07:33 UTCGHSA enrichment
  53. 2026-09-11 18:38 UTCEG score recompute
  54. 2026-09-11 18:38 UTCGHSA enrichment
  55. 2026-09-11 14:53 UTCEPSS rescore
  56. 2026-09-11 05:44 UTCGHSA enrichment
  57. 2026-09-10 16:50 UTCEG score recompute
  58. 2026-09-10 16:50 UTCGHSA enrichment
  59. 2026-09-10 09:35 UTCEPSS rescore
  60. 2026-09-10 03:57 UTCGHSA enrichment
  61. 2026-09-09 15:02 UTCGHSA enrichment
  62. 2026-09-09 02:08 UTCGHSA enrichment
  63. 2026-09-08 06:26 UTCGHSA enrichment
  64. 2026-09-07 17:32 UTCEG score recompute
  65. 2026-09-07 17:32 UTCGHSA enrichment
  66. 2026-09-07 04:39 UTCGHSA enrichment
  67. 2026-09-06 15:45 UTCEG score recompute
  68. 2026-09-06 15:45 UTCGHSA enrichment
  69. 2026-09-06 13:48 UTCEPSS rescore
  70. 2026-09-06 02:51 UTCEG score recompute
  71. 2026-09-06 02:51 UTCGHSA enrichment
  72. 2026-09-05 13:57 UTCGHSA enrichment
  73. 2026-09-05 00:58 UTCEG score recompute
  74. 2026-09-05 00:58 UTCGHSA enrichment
  75. 2026-09-04 11:58 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 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 0.2% probability of exploitation in the next 30 days (10th percentile of EPSS-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?
A fix for CVE-2026-76888 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-76888 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-76888

Explore →

Is Your Infrastructure Affected by CVE-2026-76888?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs