CVE-2026-3055 kev in the critical feed json
Insufficient input validation leading to memory overread
published 2026-03-23 7 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-14546
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Exploited
- added 2026-03-30
- epss
- 91.5%
- EPSS 91.5% chance of exploitation in 30 days, percentile 99.8%
- public exploits
- 1
- Metasploit, plus a Nuclei check
Summary
Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread
Patch / fix
cisa required action Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- NetScaler ADC 37.262, 62.23, 66.59
- NetScaler Gateway 62.23, 66.59
Timeline
- CISA SSVC: exploitation active
- First public exploit (Metasploit auxiliary/scanner/http/citrix_netscaler_cve_2026_3055)
- Published
- Added to CISA KEV
- CISA patch deadline
Known exploited
- Added
- 7 mo ago
- Patch by
- 2026-04-02 (7 mo ago)
- Ransomware
- Not known
- Required action
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- Vendor, product
- Citrix, NetScaler
- CISA name
- Citrix NetScaler Out-of-Bounds Read Vulnerability
CISA SSVC
- Exploitation
- Active, exploited in the wild
- Automatable
- yes
- Technical impact
- total
- Assessed
- 7 mo ago
Exploit prediction
91.49% chance of exploitation in the next 30 days, higher than 99.8% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Metasploit auxiliary/scanner/http/citrix_netscaler_cve_2026_3055 Citrix ADC (NetScaler) CVE-2026-3055 Scanner metasploit auxiliary, normal rank, 2026-03-23
- Nuclei template Citrix NetScaler SAML IDP - Memory Overread nuclei detection template
- labs.watchtowr.com https://labs.watchtowr.com/please-we-beg-just-one-weekend-free-of-appliances-citrix-netscaler-cve-2026-3055-memory-overread-part-2/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 9.3 | 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 |
| CNA | 4.0 | 9.3 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- NetScaler ADC
- NetScaler Gateway
Classification
- Weakness
-
- CWE-125 Out-of-bounds Read
- Technology feeds
References
-
labs.watchtowr.com
/please-we-beg-just-one-weekend-free-of-appliances-citrix-netscaler-cve-2026-3055-memory-overread-part-2/
third-party-advisory, exploit
-
support.citrix.com
/support-home/kbsearch/article?articleNumber=CTX696300
vendor-advisory
-
cisa.gov
/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-3055
government-resource, us-government-resource
Sources
- CVE List CVE-2026-3055
- NVD CVE-2026-3055
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.