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Exploitation reportedNot in CISA KEV yetFix available

CVE-2026-8451

Exploitation reported by one source. First attested on 2026-07-01 by GCVE · kevintel.

  • Published2026-06-30
  • Fixed in14.1-72.61 · 13.1-37.272 · 13.1-63.18
  • WeaknessCWE-125

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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

Timeline

dates in UTC
  1. 2026-06-3013:19CVE publishedNVD
  2. 2026-07-0121:50Listed as exploited by GCVEGCVE
  3. 2026-07-0121:50Exploitation first reportedGCVE

Versions per branch

NVD
Citrix NetScaler ADC
BranchAffectedFixed in
14.1≥ 14.1, < 14.1-72.6114.1-72.61
13.1< 13.1-37.27213.1-37.272
13.1≥ 13.1, < 13.1-63.1813.1-63.18
14.1= 14.1-66.68no fix published
Citrix NetScaler ADC
BranchAffectedFixed in
14.1≥ 14.1, < 14.1-72.6114.1-72.61
13.1≥ 13.1, < 13.1-63.1813.1-63.18

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA2 products

As NetScaler, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • NetScaler ADCother versions: not affected
    Affected
    • ≥ 14.1, < 72.61fixed in 72.61patch
    • ≥ 13.1, < 63.18fixed in 63.18patch
    • ≥ 14.1 FIPs, < 72.61fixed in 72.61patch
    • ≥ 13.1 FIPS and NDcPP, < 37.272fixed in 37.272patch
  • NetScaler Gatewayother versions: not affected
    Affected
    • ≥ 14.1, < 72.61fixed in 72.61patch
    • ≥ 13.1, < 63.18fixed in 63.18patch

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-06-30

Fix

  1. Update Citrix NetScaler ADC to 14.1-72.61 · 13.1-37.272 · 13.1-63.18

Advisories and patches

Detection

read 2026-11-01 01:02 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 4.0 vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
2026-06-30
Last Modified
2026-07-01
NVD status
Analyzed
GitHub Advisory
GHSA-6659-v5cc-894x

Frequently asked questions

What is CVE-2026-8451?

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

Is CVE-2026-8451 actively exploited?

Active exploitation of CVE-2026-8451 has not been confirmed. Its EPSS score was 14.2% on 2026-11-07, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-8451?

CVE-2026-8451 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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