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CVE-2019-12991

HIGH
8.8
CVSS Score
Published: July 16, 2019 at 05:16 PM UTC
Updated: June 17, 2026 at 02:15 AM UTC
2 products affected across 1 vendorSd WANNetscaler Sd WAN

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Severity
HIGH8.8
Exploitation
CISA KEV
Exploit prediction
EPSS 74%
SSVC
Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score74.5%

EPSS (Exploit Prediction Scoring System) estimates a 74.5% chance this CVE is exploited in the wild within the next 30 days — higher than 99% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

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

Required Action
Apply updates per vendor instructions.
Ransomware Use
Unknown
Added to KEV
Mar 25, 2022
Remediation Due
Apr 15, 2022
1662 days overdue
Notes
https://nvd.nist.gov/vuln/detail/CVE-2019-12991

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).

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Netscaler Sd WAN· Citrix
95%
10.0.0 ≤ v < 10.0.8
Affected range stops below 10.0.8, so it looks safe — our inference, not a vendor statement
Sd WAN· Citrix
95%
10.2.0 ≤ v < 10.2.3
Affected range stops below 10.2.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (5)

x_refsource_MISCExploitThird Party AdvisoryVDB Entry
Source: [email protected]
http://packetstormsecurity.com/files/153638/Citrix-SD-WAN-Appliance-10.2.2-Authentication-Bypass-Remote-Command-Execution.html
VDB Entryx_refsource_BIDBroken LinkThird Party Advisory
Source: [email protected]
http://www.securityfocus.com/bid/109133
x_refsource_MISCVendor Advisory
Source: [email protected]
https://support.citrix.com/article/CTX251987
x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://www.tenable.com/security/research/tra-2019-32
US Government Resource
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-12991

SSVC — Action Prioritization

SSVCActiveNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-78

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