by Kastro
Paper/Archive/CVE-2026-3055

CVE-2026-3055

NetScaler ADC — Insufficient input validation leading to memory overread

KEV · due 2 AprEPSS 91%public exploitSSVC actCVSS 9.3
critical.is priorityof 100
98
CVSS 9.3 (CNA)9.3 / 10 × 3027.9In CISA KEV+3030.0EPSS percentile 99.8.998 × 2020.0Exploit: SSVC active+1010.0SSVC exploitation: active+1010.0
Description · from the CVE record

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

Affected

ProductAffectedFixed inSource
ADC14.1 – < 66.5966.59CNA
ADC13.1 – < 62.2362.23CNA
ADC13.1 FIPS and NDcPP – < 37.26237.262CNA
Gateway14.1 – < 66.5966.59CNA
Gateway13.1 – < 62.2362.23CNA

Scores by source

NetScaler (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L
CISA ADPSSVCExploitation: active · Automatable: yes · Technical impact: total

References

refsupport.citrix.com/support-home/kbsearch/article?articleNumber=CTX696300writeuplabs.watchtowr.com/please-we-beg-just-one-weekend-free-of-appliances-citrix-netscaler-cve-2026-3055-memory-overread-part-2refcisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-3055kevcisa.gov/known-exploited-vulnerabilities-catalog