CVE-2026-3055
Out-of-Bounds Read in Citrix NetScaler. CISA confirmed attackers exploit it and added it to its Known Exploited Vulnerabilities catalog on 30 March 2026.
- Product
- Citrix NetScaler
- Added to CISA's catalog
- Federal fix-by date
- Ransomware
- No known use in ransomware campaigns
- Vendor advisories
- Sources
- CISA’s catalog, NVD entry
CISA’s description.
Citrix NetScaler ADC (formerly Citrix ADC), NetScaler Gateway (formerly Citrix Gateway) and NetScaler ADC FIPS and NDcPP contain an out-of-bounds reads vulnerability when configured as a SAML IDP leading to memory overread.
More from Citrix this year.
- CVE-2026-88779 Improper Restriction of Operations within the Bounds of a Memory Buffer, added
- CVE-2026-88772 Improper Restriction of Operations within the Bounds of a Memory Buffer, added
- CVE-2026-88771 Improper Input Validation, added
- CVE-2026-19490 Authentication Bypass Using an Alternate Path or Channel, added
- CVE-2026-8452 Improper Restriction of Operations within the Bounds of a Memory Buffer, added
Every flaw CISA confirmed exploited in the last 30 days is on the exploit watch. This is not security advice. Check the vendor’s advisory before acting. From CISA’s catalog of 4 November 2026.