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CVE-2023-6548

Citrix NetScaler ADC and NetScaler Gateway Code Injection

5.5 MEDIUMActively exploited (CISA KEV)EPSS 3.19%
  1. Published17 Jan 2024
  2. Added to CISA KEV17 Jan 2024
  3. Remediation due24 Jan 2024
Actively exploited (CISA KEV)

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.

Added to KEV: 17 Jan 2024Federal remediation due: 24 Jan 2024

Description

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.

CVSS 3.1 breakdown

Attack vectorAdjacent
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityLow
IntegrityLow
AvailabilityLow
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Affected products

Citrix NetScaler Application Delivery Controller≥ 13.0 < 13.0-92.21 · ≥ 13.1 < 13.1-51.15 · ≥ 14.1 < 14.1-12.35 · ≥ 12.1 < 12.1-55.302
Citrix NetScaler Gateway≥ 13.0 < 13.0-92.21 · ≥ 13.1 < 13.1-51.15 · ≥ 14.1 < 14.1-12.35

Remediation

Fixed in
Citrix NetScaler Application Delivery Controller≥ 13.0-92.21
Citrix NetScaler Gateway≥ 13.0-92.21

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Frequently asked

Is CVE-2023-6548 being actively exploited?

Yes. CVE-2023-6548 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 17 Jan 2024.

How severe is CVE-2023-6548?

CVE-2023-6548 has a CVSS 3.1 base score of 5.5, rated medium. EPSS estimates a 3.19% probability of exploitation.

Which products are affected by CVE-2023-6548?

Affected products include Citrix NetScaler Application Delivery Controller, Citrix NetScaler Gateway.

How do I fix CVE-2023-6548?

Upgrade affected software to a fixed version, for example Citrix NetScaler Application Delivery Controller 13.0-92.21, Citrix NetScaler Gateway 13.0-92.21 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-6548 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, a risk for it never ranks below high, and the update that fixes it moves to the Emergency patch lane. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.