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CVE-2019-12991

Citrix SD-WAN and NetScaler Command Injection

8.8 HIGHActively exploited (CISA KEV)Public exploitEPSS 74.1%
  1. Published16 Jul 2019
  2. Added to CISA KEV25 Mar 2022
  3. Remediation due15 Apr 2022
Actively exploited (CISA KEV)

Authenticated Command Injection in Citrix SD-WAN Appliance and NetScaler SD-WAN Appliance.

Added to KEV: 25 Mar 2022Federal remediation due: 15 Apr 2022

Description

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).

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Citrix NetScaler SD-WAN≥ 10.0.0 < 10.0.8
Citrix SD-WAN≥ 10.2.0 < 10.2.3

Remediation

Fixed in
Citrix NetScaler SD-WAN≥ 10.0.8
Citrix SD-WAN≥ 10.2.3

References

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Frequently asked

Is CVE-2019-12991 being actively exploited?

Yes. CVE-2019-12991 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 25 Mar 2022.

How severe is CVE-2019-12991?

CVE-2019-12991 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 74.1% probability of exploitation.

Which products are affected by CVE-2019-12991?

Affected products include Citrix NetScaler SD-WAN, Citrix SD-WAN.

How do I fix CVE-2019-12991?

Upgrade affected software to a fixed version, for example Citrix NetScaler SD-WAN 10.0.8, Citrix SD-WAN 10.2.3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2019-12991 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.