critical9.8Known exploited
CVE-2026-3055
Citrix NetScaler Out-of-Bounds Read Vulnerability
Exploited in the wild
This vulnerability is on the CISA Known Exploited Vulnerabilities list, added 2026-03-30. Federal due date: 2026-04-02.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Citrix | Netscaler Application Delivery Controller | from 13.1 before 13.1-37.262 from 13.1 before 13.1-62.23 from 14.1 before 14.1-60.58 |
| Citrix | Netscaler Gateway | from 13.1 before 13.1-62.23 from 14.1 before 14.1-60.58 |
Weakness classification
References
- NVD record
- CVE.org record
- CISA KEV catalog
- https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696300
- https://labs.watchtowr.com/please-we-beg-just-one-weekend-free-of-appliances-citrix-netscaler-cve-2026-3055-memory-overread-part-2/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-3055