CVE-2026-3055

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-03-30), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • 3,670 internet-exposed hosts are running an affected version right now
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 87%CVSS: 9.8Exploit: cisa kev · ssvc active · Metasploit · epss top5pct · epss high · public exploitExposed: 3,670

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

Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread

Live · internet exposure

3,670 internet-exposed hosts are running an affected version of CVE-2026-3055 right now.

across 51 countries (Germany, Australia, United States, United Kingdom, Bulgaria)top: netscaler_gateway
See the live KEV-Exposure radar →Found passively from public internet-scan data — aggregate, host-redacted.

EchelonGraph is the only CVE feed that fuses live vulnerability intelligence with its own live internet-exposure radar — so you see not just that a CVE is exploited, but how much of the internet is exposed to it right now.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
99(Act)
EG Risk 99/100SSVC: Act

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
Severity98% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS PROB
87%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

March 23, 2026

Last Modified

June 17, 2026

Advisory Details (3)

Auto-updated Sep 14, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-3055
generic

Please, We Beg, Just One Weekend Free Of Appliances (Citrix NetScaler CVE-2026-3055 Memory Overread Part 2)

https://labs.watchtowr.com/please-we-beg-just-one-weekend-free-of-appliances-citrix-netscaler-cve-2026-3055-memory-overread-part-2/
generic

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https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696300

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 56× in last 7d / 235× 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 419 total refreshes for this CVE.

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

Publicly available exploits

(2 references)

Working exploit code is in the public domain (1 Metasploit module). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Metasploitauxiliary/scanner/http/citrix_netscaler_cve_2026_3055✓ verified
    First seen Mar 23, 2026

    Citrix ADC (NetScaler) CVE-2026-3055 Scanner

    Open source ↗
  • Nucleihttp/cves/2026/CVE-2026-3055.yaml
    First seen Jan 1, 2026

    Citrix NetScaler SAML IDP - Memory Overread

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2026-3055?
CVE-2026-3055 is a critical vulnerability published on March 23, 2026. Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread
When was CVE-2026-3055 disclosed?
CVE-2026-3055 was first published in the National Vulnerability Database on March 23, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-3055 actively exploited?
Yes. CISA added CVE-2026-3055 to the Known Exploited Vulnerabilities catalog on March 30, 2026, affecting Citrix NetScaler. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2026-3055?
CVE-2026-3055 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2026-3055?
CVE-2026-3055 affects Citrix NetScaler. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2026-3055?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-3055, 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-2026-3055

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