CVE-2026-3055

criticalpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.040 · 91 %ileexploit · functionalDEEUNLRUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV · 6 exploits · functional

Likely / severe?

4.04% (91st) EPSS

CVSS 9.8 · critical

Is it mine?

30 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

added 2026-03-30remediate by 2026-04-02

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.

EPSS · scored 2026-10-23

Citrix NetScaler Out-of-Bounds Read Vulnerability

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

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v4.09.3criticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:Lsecondary · ENISA EU

v4.09.3criticalCVSS: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:Xsecondary

v4.09.3criticalCVSS: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:A/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:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-125USCWE-125USCWE-125US

exploits (6)

Public proof-of-concept and weaponised exploit code.

auxiliary/scanner/http/citrix_netscaler_cve_2026_3055Citrix ADC (NetScaler) CVE-2026-3055 Scannerfunctional · metasploit
0xBlackash/CVE-2026-3055CVE-2026-3055PoC · poc_in_github
NetVanguard-cmd/CVE-2026-3055NetVanguard-cmd/CVE-2026-3055PoC · poc_in_github
fevar54/CVE-2026-3055---Citrix-NetScaler-Memory-Overread-PoCPoC de CVE-2026-3055: memory overread en Citrix NetScaler ADC/Gateway para filtrar session IDs.PoC · poc_in_github
fevar54/CVE-2026-3055-Scanner---Herramienta-de-Detecci-nScanner de CVE-2026-3055: detecta NetScaler ADC/Gateway vulnerables a memory overread. Reportes JSON/HTML/CSV.PoC · poc_in_github
l0lsec/check-cve-2026-3055-netscalerLow-impact probe for Citrix NetScaler CVE-2026-3055 (SAML IdP memory overread)PoC · poc_in_github

affected products (30)

Products and version ranges known to be affected.

Citrix Systems NetScaler ADC <13.1-62.23all versionscert_bundDE
Citrix Systems NetScaler ADC <14.1-66.59all versionscert_bundDE
Citrix Systems NetScaler ADC FIPS <13.1-37.262all versionscert_bundDE
Citrix Systems NetScaler ADC NDcPP <13.1-37.262all versionscert_bundDE
Citrix Systems NetScaler Gateway <13.1-62.23all versionscert_bundDE
Citrix Systems NetScaler Gateway <14.1-66.59all versionscert_bundDE
Citrix Systems NetScaler≤ ADC <13.1-62.23cert_bundDE
Citrix Systems NetScaler≤ ADC <14.1-66.59cert_bundDE
Citrix Systems NetScaler≤ ADC FIPS <13.1-37.262cert_bundDE
Citrix Systems NetScaler≤ ADC NDcPP <13.1-37.262cert_bundDE
Citrix Systems NetScaler≤ Gateway <13.1-62.23cert_bundDE
Citrix Systems NetScaler≤ Gateway <14.1-66.59cert_bundDE
NetScaler ADC13.1 → 62.23enisa_euvdEU
NetScaler ADC13.1 FIPS and NDcPP → 37.262enisa_euvdEU
NetScaler ADC14.1 → 66.59enisa_euvdEU
NetScaler Gateway13.1 → 62.23enisa_euvdEU
NetScaler Gateway14.1 → 66.59enisa_euvdEU
Citrix Systems Inc. Citrix ADC13.1 → 13.1-62.23fstec_bduRU
Citrix Systems Inc. Citrix ADC14.1 → 14.1-66.59fstec_bduRU
Citrix Systems Inc. NetScaler ADC FIPS13.1 → 37.262fstec_bduRU

showing 20 of 30

advisories (2)

Vendor and ecosystem advisories describing this.

NCSC-2026-0100Kwetsbaarheden verholpen in Citrix Netscaler ADC en Netscaler GatewayNL2026-03-23csaf · ncsc_nlNL
Citrix heeft kwetsbaarheden verholpen in hun software die verband houden met onvoldoende invoervalidatie en een raceconditie in het sessiebeheer.
WID-SEC-W-2026-0836Citrix Systems NetScaler: Mehrere SchwachstellenDeutsch2026-03-23csaf · cert_bundDE
Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in Citrix Systems NetScaler ausnutzen, um Informationen offenzulegen und um eine Benutzersitzung zu übernehmen.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund ncsc_nl NVD CVE.org MITRE

published 2026-03-23modified 2026-06-17

references (5)

External citations — patches, advisories, analysis.

scry

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