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[Update] Vulnerability in Citrix NetScaler ADC and NetScaler Gateway (October 23, 2023)

unknownknown exploitedpublic exploitCVE-2023-4966
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
[Update on November 22, 2023] The vendor published a document [3] on November 20, 2023, listing the various logs to analyze as well as the items to look for to identify activity that may be related to a compromise. Additionally, CISA published a security advisory on the 21...

CSIRTS triage

vendor: Citrixproduct: NetScaler ADCOther
What
A vulnerability exists in Citrix NetScaler ADC and NetScaler Gateway.
Who is affected
Deployments of Citrix NetScaler ADC and NetScaler Gateway are affected.
Urgency
Remediation is urgent as the vulnerability has been exploited.
Action
Follow the vendor's guidance for mitigation and monitoring.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CERT-FR Alertes de sécurité (FR · national-cert · site)
Severity
unknown
Published
2023-10-23
Exploitation
Observed in the wild (CISA KEV)
Language
Machine-translated to English — verify against the original

Original advisory: https://www.cert.ssi.gouv.fr/alerte/CERTFR-2023-ALE-012/

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2023-4966coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

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