What is CVE-2019-12987?

CVE-2019-12987 is a critical-severity vulnerability in Citrix Netscaler Sd-Wan, classified under OS Command Injection. CVSS score: 9.8/10. Published 2019-07-16.

How severe is CVE-2019-12987?

Critical severity. CVSS v3 base score is 9.8 out of 10.

RCE in Citrix Netscaler Sd-Wan

CVE-2019-12987

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 3 of 6).

Vulnerability class: Command Injection (OS Command Injection)

Published 2019-07-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.426 (98.7th percentile), scored 2026-09-28.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 99th percentile — 98.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.426 · newest: 0.426 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

www.tenable.com/security/research/tra-2019-31 (Exploit, Third Party Advisory)
www.securityfocus.com/bid/109133 (VDB Entry, Third Party Advisory, vdb-entry)
support.citrix.com/article/CTX251987 (Vendor Advisory)

Frequently asked questions

What is CVE-2019-12987?: CVE-2019-12987 is a critical-severity vulnerability in Citrix Netscaler Sd-Wan, classified under OS Command Injection. CVSS score: 9.8/10. Published 2019-07-16.
How severe is CVE-2019-12987?: Critical severity. CVSS v3 base score is 9.8 out of 10.