Back to CVE records
Critical 9.3Known exploited (CISA KEV)Published Mar 23, 2026
CVE-2026-3055Insufficient input validation leading to memory overread
Updated under an hour ago ()
Does this affect you?
It affects NetScaler ADC and 3 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Mar 30, 2026; federal agencies had to remediate by Apr 2, 2026. Treat that date as your deadline.
Do this next
Start free and add your stack
Free account, 1 product
Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread
- CVSS
- 9.3 CRITICAL (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L
- Weakness (CWE)
- CWE-125
- Known exploited
- Added to CISA KEV Mar 30, 2026; federal remediation due Apr 2, 2026Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- EPSS (exploitation in the next 30 days)
- 4.04% (percentile 90)
- Assigned by
- NetScaler
- NVD analysis
- Analyzed
- Record last updated
- Mar 31, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
NetScaler ADC netscaler:adc (from the name) | from 14.1 before 66.59; from 13.1 before 62.23; from 13.1 FIPS and NDcPP before 37.262 | CNA record |
NetScaler Gateway netscaler:gateway (from the name) | from 14.1 before 66.59; from 13.1 before 62.23 | CNA record |
citrix netscaler_application_delivery_controller citrix:netscaler_application_delivery_controller | from 13.1 before 13.1-37.262; from 13.1 before 13.1-37.262; from 13.1 before 13.1-62.23; from 14.1 before 14.1-60.58 | NVD |
citrix netscaler_gateway citrix:netscaler_gateway | from 13.1 before 13.1-62.23; from 14.1 before 14.1-60.58 | NVD |
References
- https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696300vendor-advisory
- https://labs.watchtowr.com/please-we-beg-just-one-weekend-free-of-appliances-citrix-netscaler-cve-2026-3055-memory-overread-part-2/exploit, third-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-3055us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.