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.
  • 175 internet-exposed hosts are running an affected version right now
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 78%CVSS: 9.8Exploit: cisa kev · ssvc active · Metasploit · epss top5pct · epss high · public exploitExposed: 175

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

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

across 27 countries (United States, Germany, Indonesia, United Kingdom, Norway)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
78%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

March 23, 2026

Last Modified

June 17, 2026

Advisory Details (1)

Auto-updated Jul 27, 2026
No patch confirmed yet.
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 38× in last 7d / 38× 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.

  1. 2026-07-31 19:15 UTCGHSA enrichment
  2. 2026-07-31 15:29 UTCGHSA enrichment
  3. 2026-07-31 11:42 UTCGHSA enrichment
  4. 2026-07-31 07:56 UTCGHSA enrichment
  5. 2026-07-31 04:11 UTCGHSA enrichment
  6. 2026-07-31 00:25 UTCGHSA enrichment
  7. 2026-07-30 20:39 UTCGHSA enrichment
  8. 2026-07-30 16:51 UTCEG score recompute
  9. 2026-07-30 16:51 UTCGHSA enrichment
  10. 2026-07-30 16:28 UTCEPSS rescore
  11. 2026-07-30 13:04 UTCGHSA enrichment
  12. 2026-07-30 09:19 UTCEG score recompute
  13. 2026-07-30 09:19 UTCGHSA enrichment
  14. 2026-07-30 05:34 UTCGHSA enrichment
  15. 2026-07-30 01:47 UTCGHSA enrichment
  16. 2026-07-29 22:01 UTCGHSA enrichment
  17. 2026-07-29 19:27 UTCCISA KEV update
  18. 2026-07-29 18:14 UTCGHSA enrichment
  19. 2026-07-29 14:28 UTCGHSA enrichment
  20. 2026-07-29 10:43 UTCGHSA enrichment
  21. 2026-07-29 06:55 UTCGHSA enrichment
  22. 2026-07-29 03:09 UTCGHSA enrichment
  23. 2026-07-28 23:23 UTCGHSA enrichment
  24. 2026-07-28 19:37 UTCGHSA enrichment
  25. 2026-07-28 15:52 UTCEG score recompute
Show 13 more
  1. 2026-07-28 15:52 UTCGHSA enrichment
  2. 2026-07-28 12:06 UTCGHSA enrichment
  3. 2026-07-28 08:20 UTCGHSA enrichment
  4. 2026-07-28 04:34 UTCGHSA enrichment
  5. 2026-07-28 00:48 UTCGHSA enrichment
  6. 2026-07-27 21:03 UTCGHSA enrichment
  7. 2026-07-27 19:24 UTCCISA KEV update
  8. 2026-07-27 17:17 UTCEG score recompute
  9. 2026-07-27 17:17 UTCGHSA enrichment
  10. 2026-07-27 17:17 UTCCISA KEV update
  11. 2026-07-27 14:13 UTCEPSS rescore
  12. 2026-07-27 12:50 UTCEG score recompute
  13. 2026-07-27 12:50 UTCGHSA enrichment

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 ↗

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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