CVE-2026-3055
Actively exploited. CVE-2026-3055 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-03-30) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
Public exploit code is available. Proof-of-concept or working exploit code for CVE-2026-3055 is indexed in Metasploit and Nuclei. Expect opportunistic scanning and exploitation attempts — prioritize remediation.
On 23 March 2026, Citrix published a security advisory addressing multiple vulnerabilities affecting NetScaler ADC and NetScaler Gateway. These vulnerabilities may lead to sensitive information disclosure and user session mix-up under specific configurations. At the time of writing, there is no public evidence of active exploitation. It is strongly recommended updating affected gateways, prioritising internet-facing assets. It is also recommended to preserve evidence for further investigation.
CSIRTS triage
- What
- Multiple vulnerabilities may lead to sensitive information disclosure and user session mix-up.
- Who is affected
- Users of Citrix NetScaler ADC and NetScaler Gateway are affected under specific configurations.
- Urgency
- Remediation is recommended but not urgent as there is no public evidence of active exploitation.
- Action
- Update affected gateways, prioritising internet-facing assets.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 100% of all EPSS-scored CVEs.
Exploit availability
Public exploit or proof-of-concept code for CVE-2026-3055 is indexed in these free datasets. Available exploit code raises real-world risk independent of the CVSS score.
- MetasploitA Metasploit Framework module targets this CVE — weaponized, point-and-click exploitation.look it up ↗
- NucleiA nuclei-templates detection/PoC template exists for this CVE.look it up ↗
Advisory coverage (2)
- criticalexploitedCVE-2026-3055: Citrix NetScaler Out-of-Bounds Read Vulnerabilitycisa-kev · 2026-03-30
- unknown2026-003: Multiple Vulnerabilities in Citrix NetScaler and Citrix ADCcert-eu · 2026-03-23
External references
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