CVE-2019-12991

Name: CVE-2019-12991
Creator: NVD / NIST
Published: 2019-07-16T18:15:13.117+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10Actively ExploitedEPSS 74.51%

Last modified Jun 17, 2026

CVE-2019-12991 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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).. CISA has confirmed active exploitation in the wild. EPSS estimates a 74.51% chance of exploitation in the next 30 days.

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).

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

74.51%

99.4th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Apr 15, 2022.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Citrix	Netscaler Sd-Wan	>= 10.0.0, < 10.0.8
Citrix	Sd-Wan	>= 10.2.0, < 10.2.3

References

http://packetstormsecurity.com/files/153638/Citrix-SD-WAN-Appliance-10.2.2-Authentication-Bypass-Remote-Command-Execution.htmlExploit, Third Party Advisory, VDB Entry
http://www.securityfocus.com/bid/109133Broken Link, Third Party Advisory, VDB Entry
https://support.citrix.com/article/CTX251987Vendor Advisory
https://www.tenable.com/security/research/tra-2019-32Exploit, Third Party Advisory
http://packetstormsecurity.com/files/153638/Citrix-SD-WAN-Appliance-10.2.2-Authentication-Bypass-Remote-Command-Execution.htmlExploit, Third Party Advisory, VDB Entry
http://www.securityfocus.com/bid/109133Broken Link, Third Party Advisory, VDB Entry
https://support.citrix.com/article/CTX251987Vendor Advisory
https://www.tenable.com/security/research/tra-2019-32Exploit, Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-12991US Government Resource

Timeline

Published: Jul 16, 2019
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2019-12991?

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).

How severe is CVE-2019-12991?

CVE-2019-12991 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 74.51% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2019-12991?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-12991?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST