A remote code execution vulnerability exists due to improper input validation, which can allow an unauthenticated attacker to execute arbitrary commands
Published Sep 27, 2026 ·Due Sep 30, 2026
9.5
CRITICALCVSS 4.0
EPSS 1.06%
Description
Improper input validation vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway.
This issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1.37.279 FIPS and NDcPP; Gateway: before 14.1-73.37 and before 13.1-64.23 leading to an unauthenticated attacker to execute arbitrary commands.
Affected products
-
- Version 0StatusaffectedConstraints<13.1-64.23
- Version 0StatusaffectedConstraints<13.1.37.279 FIPS and NDcPP
- Version 0StatusaffectedConstraints<14.1-73.37
- Version 0StatusaffectedConstraints<14.1-73.37 FIPS
- Version
-
- Version 0StatusaffectedConstraints<13.1-64.23
- Version 0StatusaffectedConstraints<14.1-73.37
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Citrix NetScaler | ADC | unaffected |
| |||||||||||||||
| Citrix NetScaler | Gateway | unaffected |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
Date Added
Sep 27, 2026
Patch Due
Sep 30, 2026
Required Action
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
ActiveAutomatable
YesTechnical Impact
TotalDecision
n/aAssessed Sep 28, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Not enough EPSS history yet for a chart. At least two recorded scores are needed.
Percentile over time
Not enough EPSS history yet for a chart. At least two recorded scores are needed.
References (2)
Change history (12)
- CISA ADP
- SSVC automatable changed from no to
yes no → yes
- SSVC automatable changed from no to
yes
- CISA ADP
- SSVC automatable changed from yes to
no yes → no
- SSVC automatable changed from yes to
no
- CISA ADP
- SSVC automatable changed from no to
yes no → yes
- SSVC automatable changed from no to
yes
- CISA ADP
- SSVC automatable changed from yes to
no yes → no
- SSVC automatable changed from yes to
no
- CISA ADP
- SSVC automatable changed from no to
yes no → yes
- SSVC automatable changed from no to
yes
- CISA ADP
- SSVC automatable changed from yes to
no yes → no
- SSVC automatable changed from yes to
no
- CISA ADP
- SSVC automatable changed from no to
yes no → yes
- SSVC automatable changed from no to
yes
- CISA ADP
- SSVC automatable changed from yes to
no yes → no
- SSVC automatable changed from yes to
no
- CISA ADP
- SSVC automatable changed from no to
yes no → yes
- SSVC automatable changed from no to
yes
- CISA ADP
- SSVC automatable changed from yes to
no yes → no
- SSVC automatable changed from yes to
no
- CISA ADP
- SSVC automatable changed from no to
yes no → yes
- SSVC automatable changed from no to
yes
- CISA ADP
- SSVC automatable changed from yes to
no yes → no
- SSVC automatable changed from yes to
no