Vulnerability details
CVE-2026-3055
Actively exploited
NetScaler ADCNetScaler Gateway
Insufficient input validation leading to memory overread
CVSS 4.0
9.3Critical
Official description
Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.3Critical | 4.0 | CVEProject cvelistV5 (CNA) (NetScaler) | 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 |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| NetScaler | ADC | 13.1 ≤ v < 62.23 | CVEProject cvelistV5 (CNA) |
| NetScaler | ADC | 13.1 FIPS and NDcPP ≤ v < 37.262 | CVEProject cvelistV5 (CNA) |
| NetScaler | ADC | 14.1 ≤ v < 66.59 | CVEProject cvelistV5 (CNA) |
| NetScaler | Gateway | 13.1 ≤ v < 62.23 | CVEProject cvelistV5 (CNA) |
| NetScaler | Gateway | 14.1 ≤ v < 66.59 | CVEProject cvelistV5 (CNA) |
References and advisories
3- 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/ third-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-3055 government-resource
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Details
- Published
- 2026-03-23
- Last updated
- 2026-03-31
- State
- Published
- Assigner (CNA)
- NetScaler
- Kolun priority
- 79 · High
CISA KEV catalog
- Date added
- 2026-03-30
- Due date
- 2026-04-02
- Used in ransomware
- Unknown
Exploit prediction (EPSS)
91.49%
Probability of exploitation in 30 days
99.8%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- Active
- Technical impact
- Total
Weaknesses (CWE)
- CWE-125Out-of-bounds Read