Security Digest · Vulnerability record · Known exploited
CVE-2023-6548: Citrix NetScaler ADC and NetScaler Gateway Code Injection Vulnerability
Exploited in the wild (CISA KEV). Improper Control of Generation of Code ('Code Injection') in NetScaler ADC and NetScaler Gateway allows an attacker with access to NSIP, CLIP or SNIP with management interface to perform Authenticated (low privileged) remote code execution on Management Interface.
CISA KEV · added 2024-01-17 CVSS 5.5 Medium EPSS 3.2% · p88
Should you act?
Exploited: patch now if you run it
CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- Yes, if you run Citrix NetScaler ADC and NetScaler Gateway. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2024-01-17, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2024-01-24; treat that as the outer limit, not the target.
- EPSS 3.2%, percentile 88: FIRST’s model estimates a 3.2% chance of exploitation activity in the next 30 days, higher than 88% of all scored CVEs (elevated). EPSS is a probability, not a verdict.
- Needs an account (low (any account)). Exposure depends on who can log in.
What it is
Improper Control of Generation of Code ('Code Injection') in NetScaler ADC and NetScaler Gateway allows an attacker with access to NSIP, CLIP or SNIP with management interface to perform Authenticated (low privileged) remote code execution on Management Interface.
CISA’s summary
Citrix NetScaler ADC and NetScaler Gateway contain a code injection vulnerability that allows for authenticated remote code execution on the management interface with access to NSIP, CLIP, or SNIP.
Weakness type: CWE-94.
Product: Citrix NetScaler ADC and NetScaler Gateway · Assigned by: Citrix · Published: 2024-01-17
Affected and fixed versions
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| Cloud Software Group | NetScaler ADC | 14.1 < 12.35, 13.1 < 51.15, 13.0 < 92.21, 13.1-FIPS < 37.176, 12.1-FIPS < 55.302, 12.1-NDcPP < 55.302 |
| Cloud Software Group | NetScaler Gateway | 14.1 < 12.35, 13.1 < 51.15, 13.0 < 92.21 |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| Citrix | 3.1 | 5.5 Medium | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L |
- Attack vector: adjacent network only
- Attack complexity: low
- Privileges required: low (any account)
- User interaction: none
- Scope: unchanged
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: added 2024-01-17; federal due date 2024-01-24. Known ransomware use: Unknown.
- CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active, automatable no, technical impact total.
- FIRST EPSS (model of 2026-10-21): 3.19% probability of exploitation activity in the next 30 days; percentile 88.
Timeline
- — Added to CISA’s Known Exploited Vulnerabilities catalog
- — CVE record published by Citrix
- — CISA remediation deadline for US federal agencies
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vendor and project advisories, patches
- Listed in CISA KEV notes (support.citrix.com) support.citrix.com
Vulnerability records
- CVE.org record CVE-2023-6548 cve.org
- NVD entry CVE-2023-6548 nvd.nist.gov
Government
All exploited Citrix vulnerabilities · Today’s Security Digest