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CVE-2019-12991: Citrix SD-WAN and NetScaler Command Injection Vulnerability

criticalknown exploitedpublic exploitCVE-2019-12991
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.
Authenticated Command Injection in Citrix SD-WAN Appliance and NetScaler SD-WAN Appliance.

CSIRTS triage

vendor: Citrixproduct: SD-WAN Appliance and NetScaler SD-WAN ApplianceRemote code executionOther
What
Authenticated command injection vulnerability can lead to remote code execution.
Who is affected
Users of Citrix SD-WAN and NetScaler SD-WAN Appliances are affected.
Urgency
Immediate action is necessary due to the critical nature of the vulnerability and active exploitation.
Action
Apply the latest updates from Citrix to remediate this issue.

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

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2022-03-25
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2019-12991

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-2019-12991coverage & exploitation statusNVD · CVE.org

Recent advisories for Citrix SD-WAN and

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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