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

Citrix SD-WAN 10.2.x before 10.2.3 and NetScaler SD-WAN 10.0.x before 10.0.8 have Improper Input Validation (issue 5 of 6).

01What is this vulnerability?

Citrix SD-WAN 10.2.x before 10.2.3 and NetScaler SD-WAN 10.0.x before 10.0.8 have Improper Input Validation (issue 5 of 6).

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Yes — actively exploited. Added to the CISA KEV catalog on 2022-03-25. Ransomware use: Unknown.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

Open in Sigma generator →

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2019-07-16T17:16:38.000Z
• Last modified: 2025-10-21T23:45:33.894Z
• Added to CISA KEV: 2022-03-25
• BOD 22-01 due: 2022-04-15

09References

• www.tenable.com — https://www.tenable.com/security/research/tra-2019-32
• www.securityfocus.com — http://www.securityfocus.com/bid/109133
• packetstormsecurity.com — http://packetstormsecurity.com/files/153638/Citrix-SD-WAN-Appliance-10.2.2-Authe…
• support.citrix.com — https://support.citrix.com/article/CTX251987