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CVE-2026-3055

Insufficient input validation leading to memory overread

9.3 CriticalIn KEVPublic exploit

CVE-2026-3055 is a critical vulnerability (CVSS 9.3) in Citrix Netscaler, published March 23, 2026. CISA lists it as known to be exploited, since March 30, 2026. EUVD reports exploitation since March 30, 2026. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 91.5%, the 99th percentile. No source names a fixed version.

Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

91.5%Up 91.5 points since Mar 24, 2026
90%50%10%1%

What each source reports

CVE List Score used 9.3

Insufficient input validation leading to memory overread

Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread

Record
CVE-2026-3055
CVSS 4.0
9.3 CriticalCVSS: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-125
Updated
2026-11-02
EUVDEUVD-2026-14546 9.3

Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread

Record
EUVD-2026-14546
CVSS 4.0
9.3 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L
Updated
2026-11-02
GitHub AdvisoriesGHSA-wv7p-q4p2-p6pf 9.3

Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML...

Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread

Record
GHSA-wv7p-q4p2-p6pf
CVSS 4.0
9.3 CriticalCVSS: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
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-125
Updated
2026-11-02
CISA KEV No score

Citrix NetScaler Out-of-Bounds Read Vulnerability

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.

Record
CVE-2026-3055
Weakness
CWE-125
Updated
2026-11-02
NVD 9.3

Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread

Record
CVE-2026-3055
CVSS 4.0
9.3 CriticalCVSS: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
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-125
Updated
2026-11-02

Affected products

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
PoC in GitHub0xBlackash/CVE-2026-30552026-03-29
PoC in GitHubfevar54/CVE-2026-3055---Citrix-NetScaler-Memory-Overread-PoC2026-03-31
PoC in GitHubfevar54/CVE-2026-3055-Scanner---Herramienta-de-Detecci-n2026-03-31
PoC in GitHubl0lsec/check-cve-2026-3055-netscaler2026-04-01
PoC in GitHubNetVanguard-cmd/CVE-2026-30552026-04-19
MetasploitCitrix ADC (NetScaler) CVE-2026-3055 Scanner2026-03-23
NucleiCitrix NetScaler SAML IDP - Memory Overread

History

History
WhenChangedSources
2026-11-03exploitation, exploits
2026-11-02createdCVE List, EUVD, GitHub Advisories, CISA KEV, Metasploit, Nuclei, NVD, PoC in GitHub

References

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