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CVE record · CVE-2023-4966

Unauthenticated sensitive information disclosure

CVSS 9.4 CriticalCriticalIn CISA KEV · ransomwareEPSS 1.00 · 99th percentile

Critical, because:

  • In CISA’s KEV catalogue since 18 Oct 2023: it is known to be exploited.
  • CVSS score 9.4: 9.0 or more.
  • CVSS score 9.4 (7.0 or more) and EPSS 1.00 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

How we decide what’s critical

Published by the CVE Program (CNA: Citrix) at 10 Oct 2023, 13:12 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Citrix NetScaler ADC
  • affected 14.1 to before 8.50 patch
  • affected 13.1 to before 49.15 patch
  • affected 13.0 to before 92.19 patch
  • affected 13.1-FIPS to before 37.164 patch
  • affected 12.1-FIPS to before 55.300 patch
  • affected 12.1-NDcPP to before 55.300 patch
Other versions: unaffected
Citrix NetScaler Gateway
  • affected 14.1 to before 8.50 patch
  • affected 13.1 to before 49.15 patch
  • affected 13.0 to before 92.19 patch
Other versions: unaffected
Identifiers
CVE-2023-4966
CNA
Citrix
Weakness (CWE)
CWE-119
Tags
Published
10 Oct 2023
Updated
31 Jul 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.4 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L CNA (Citrix)
  • CISA KEV Listed since 18 Oct 2023: known to be exploited. CISA reports use in ransomware campaigns.
  • EPSS 1.00, the 99th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 10 Oct 2023. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.