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CVE record · CVE-2025-6543

Memory overflow vulnerability leading to unintended control flow and Denial of Service

CVSS 9.2 CriticalCriticalIn CISA KEVEPSS 0.10 · 95th percentile

Critical, because:

  • In CISA’s KEV catalogue since 30 Jun 2025: it is known to be exploited.
  • CVSS score 9.2: 9.0 or more.
  • CVSS score 9.2 (7.0 or more) and EPSS 0.10 (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 25 Jun 2025, 12:49 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
NetScaler ADC
  • affected 14.1 to before 47.46 patch
  • affected 13.1 to before 59.19 patch
  • affected 13.1 FIPS and NDcPP to before 37.236 patch
Other versions: unaffected
NetScaler Gateway
  • affected 14.1 to before 47.46 patch
  • affected 13.1 to before 59.19 patch
  • affected 13.1 FIPS and NDcPP to before 37.236 patch
Other versions: unaffected
Identifiers
CVE-2025-6543
CNA
Citrix
Weakness (CWE)
CWE-119
Tags
Published
25 Jun 2025
Updated
26 Feb 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
9.2 Critical 4.0 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L CNA (Citrix)
  • CISA KEV Listed since 30 Jun 2025: known to be exploited.
  • EPSS 0.10, the 95th percentile, on 9 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 25 Jun 2025. 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.