What is CVE-2019-11550?

CVE-2019-11550 is a medium-severity vulnerability in Citrix Netscaler Sd-Wan, classified under Improper Certificate Validation. CVSS score: 5.9/10. Published 2019-05-08.

How severe is CVE-2019-11550?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Citrix Netscaler Sd-Wan

CVE-2019-11550

Citrix SD-WAN 10.2.x before 10.2.1 and NetScaler SD-WAN 10.0.x before 10.0.7 have Improper Certificate Validation.

Vulnerability class: Improper Certificate Validation

Published 2019-05-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.006 (45.7th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 45.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

References

support.citrix.com/v1/search (Vendor Advisory)
support.citrix.com/article/CTX247735 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2019-11550?: CVE-2019-11550 is a medium-severity vulnerability in Citrix Netscaler Sd-Wan, classified under Improper Certificate Validation. CVSS score: 5.9/10. Published 2019-05-08.
How severe is CVE-2019-11550?: Medium severity. CVSS v3 base score is 5.9 out of 10.