CVE-2026-76888

HIGHNVD 7.57.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.2% (11th percentile of EPSS-scored CVEs). GitHub Security Advisory CVSS 3.1 is lower than this score; a lower GitHub score revises it only when its advisory is newer than the CVE record's last change, and this advisory (published 2026-08-20) is not newer than that change (2026-09-17), so it does not.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 3 sources updated this weekElevated

Also known asEUVD-2026-63144 (ENISA EUVD) · GHSA-744r-mg5c-qh5x (GitHub Security Advisories)Source: ENISA EUVD

7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.5Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

Fixed versions, as the CVE record's CNA (GitLab Inc.) states them: "Upgrade to version 4.6.8 or above".

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 50/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
11th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.

EG Severity
7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-27). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track 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). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 19, 2026

Last Modified

September 17, 2026

Advisory Details (2)

Auto-updated Aug 28, 2026
Patch available.
Web page

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
Web page

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 9× in last 7d / 55× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 195 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 95 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  3. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  4. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  5. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  6. 2026-10-27 19:49 UTCEG score recompute
  7. 2026-10-27 19:49 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  8. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  9. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  10. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  11. 2026-10-25 14:01 UTCEG score recompute
  12. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  13. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  14. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  15. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  16. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  17. 2026-10-20 08:14 UTCEG score recompute
  18. 2026-10-20 08:14 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  19. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  20. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  21. 2026-10-18 03:12 UTCEG score recompute
  22. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  23. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  24. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  25. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
Show 75 more
  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  2. 2026-10-13 07:03 UTCEG score recompute
  3. 2026-10-13 07:02 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  4. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  5. 2026-10-12 15:38 UTCEG score recompute
  6. 2026-10-11 19:23 UTCEG score recompute
  7. 2026-10-11 16:39 UTCEG score recompute
  8. 2026-10-11 13:58 UTCEG score recompute
  9. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  12. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  13. 2026-10-08 05:55 UTCEG score recompute
  14. 2026-10-08 05:55 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  15. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  16. 2026-10-07 05:52 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  17. 2026-10-06 16:57 UTCEG score recompute
  18. 2026-10-06 16:57 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  19. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  20. 2026-10-06 03:39 UTCEG score recompute
  21. 2026-10-06 03:39 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  22. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  23. 2026-10-05 10:15 UTCEG score recompute
  24. 2026-10-05 10:15 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  25. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  26. 2026-10-04 21:21 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  27. 2026-10-04 05:58 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  28. 2026-10-03 17:05 UTCEG score recompute
  29. 2026-10-03 17:05 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  30. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  31. 2026-10-03 04:11 UTCEG score recompute
  32. 2026-10-03 04:11 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  33. 2026-10-02 14:51 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  34. 2026-10-02 01:21 UTCEG score recompute
  35. 2026-10-02 01:21 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  36. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  37. 2026-10-01 10:15 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  38. 2026-09-30 21:21 UTCEG score recompute
  39. 2026-09-30 21:21 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  40. 2026-09-30 08:28 UTCEG score recompute
  41. 2026-09-30 08:28 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  42. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  43. 2026-09-28 21:40 UTCEG score recompute
  44. 2026-09-28 21:40 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  45. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  46. 2026-09-28 06:01 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  47. 2026-09-27 17:08 UTCEG score recompute
  48. 2026-09-27 17:08 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  49. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  50. 2026-09-27 04:14 UTCEG score recompute
  51. 2026-09-27 04:14 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  52. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  53. 2026-09-26 00:28 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  54. 2026-09-25 00:46 UTCEG score recompute
  55. 2026-09-25 00:46 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  56. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  57. 2026-09-24 10:28 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  58. 2026-09-23 21:34 UTCEG score recompute
  59. 2026-09-23 21:34 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  60. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  61. 2026-09-23 08:41 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  62. 2026-09-22 19:47 UTCEG score recompute
  63. 2026-09-22 19:47 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  64. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  65. 2026-09-22 04:24 UTCEG score recompute
  66. 2026-09-22 04:24 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  67. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  68. 2026-09-21 15:29 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  69. 2026-09-21 01:46 UTCEG score recompute
  70. 2026-09-21 01:46 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  71. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  72. 2026-09-20 12:37 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  73. 2026-09-19 23:40 UTCEG score recompute
  74. 2026-09-19 23:39 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1
  75. 2026-09-19 10:46 UTCGHSA enrichmentGHSA-744r-mg5c-qh5x · GitHub severity LOW · GitHub CVSS 3.1

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-76888?
CVE-2026-76888 is a high-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-76888 published?
The CVE record for CVE-2026-76888 was published on August 19, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 17, 2026; the record at its source may have been updated since.
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 (11th 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. Fixed versions, as the CVE record's CNA (GitLab Inc.) states them: "Upgrade to version 4.6.8 or above". 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