CRITICALExploited in the wildUnknown

Citrix NetScaler ADC and Gateway Buffer Overflow Vulnerability

https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694788 ; https://www.netscaler.com/blog/news/netscaler-critical-security-updates-for-cve-2025-6543-and-cve-2025-5777/ ; https://nvd.nist.gov/vuln/detail/CVE-2025-6543

CVE-2025-6543Published 1 year agoSource: CISA KEV

Affected packages

No package-level mapping for this advisory.

Exploit signal

Known exploited (CISA KEV)
Yes
EPSS score
10.09%
EPSS percentile
95.2%

EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs. This advisory is in the top 95%.

Sources

No external sources available.

Recommended response stack

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Citrix NetScaler ADC and Gateway Buffer Overflow Vulnerability | HackTribune