Your RSA-2048 keys break in 2030. Find every one of them before attackers do.
🛡️
CISA KEV · ACTIVELY EXPLOITED
HIGH severity

CVE-2019-12991

HIGH

CVE-2019-12991 is a high-severity (CVSS 8.8) OS Command Injection vulnerability. It is in CISA's Known Exploited Vulnerabilities catalog (added 2022-03-25) — treat it as actively exploited and patch now. No vendor fix is recorded yet; mitigation options are listed below.

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).

Published
Updated
Affected
2 products
Patched
See advisory
Exploits
6 known
Exploitation data as of Oct 22, 2026 · OSV.dev, NVD, CISA KEV, FIRST.org (EPSS)

Exploitation Status

Actively exploited in the wild

  • Confirmed by CISA's Known Exploited Vulnerabilities catalog on 2022-03-25. Federal agencies were required to remediate by 2022-04-15.
  • A successful exploit gives an attacker total control of the affected component, not partial access.

Exploitation and automatability from CISA (KEV catalog and SSVC triage) for CVE-2019-12991.

EPSS Exploitation Probability

via FIRST.org ↗
74.5%probability of exploitation in next 30 days
Very High Risk+0.41%
Lower risk than most CVEs99th percentile — riskier than 99% of all scored CVEsHighest risk
71.7%75.5%79.3%83.1%81.0%74.5%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2019-12991 by exploitation likelihood (EPSS) against impact (CVSS). In the shaded patch-first corner (EPSS 50%+, CVSS 7.0+).

Where this sits among everything scored

Of 394,803 CVEs with a current EPSS score, this one falls in the 50–90% band (highlighted). Counts from FIRST.org, log-scaled.

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 Products

2 products · 2 configurations
Application
netscaler sd-wancitrix
≥ 10.0.0 && < 10.0.8
range
Application
sd-wancitrix
≥ 10.2.0 && < 10.2.3
range
Exploits & PoCs
6

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

EDB-47112webappscgi✓ Verified

Citrix SD-WAN Appliance 10.2.2 - Authentication Bypass / Remote Command Execution

by Chris Lyne · Jul 12, 2019

Exploit-DB Source

Detection & mitigation playbook

Vulnerability

  1. Detect

    Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).

  2. Remediation status

    No fixed release is recorded for CVE-2019-12991 yet. Track the upstream advisory, and apply the exposure-reduction steps below in the meantime.

  3. Mitigate without a patch

    Stop passing untrusted input into the interpreter or shell: call the affected binary with an argument array rather than a composed command string, reject anything outside a strict allowlist of expected values, and run the component under an account that cannot reach beyond the work it legitimately does.

Frequently Asked Questions

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).
O3 Security · Impact-Aware SCA

Is CVE-2019-12991 in your dependencies?

Find it across , including transitive dependencies.

Scan my dependencies How O3 SCA works
CVE-2019-12991: Command Injection (High 8.8, KEV)