How severe is CVE-2023-6548?

CVE-2023-6548 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2023-6548 being actively exploited?

Yes. CVE-2023-6548 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2024-01-17, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2023-6548?

CVE-2023-6548 primarily affects Citrix Netscaler Application Delivery Controller. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-6548?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2023-6548 have an EU (EUVD) identifier?

Yes. CVE-2023-6548 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-58778. It is also flagged as exploited in the EUVD (since 2024-01-17).

When was CVE-2023-6548 published?

CVE-2023-6548 was published on 2024-01-17 and last updated on 2026-06-17.

CVE-2023-6548

CVE-2023-6548 is a medium-severity vulnerability in Citrix Netscaler Application Delivery Controller with a CVSS 3.x base score of 5.5. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2024-01-17). The underlying weakness is classified as CWE-94.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 3% (88th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2024-01-17)
EU (EUVD) id: EUVD-2023-58778
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2024-01-17)
Weakness: CWE-94
Affected product: Citrix Netscaler Application Delivery Controller
Published: 2024-01-17
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2023-6548?: 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.
How severe is CVE-2023-6548?: CVE-2023-6548 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2023-6548 being actively exploited?: Yes. CVE-2023-6548 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2024-01-17, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2023-6548?: CVE-2023-6548 primarily affects Citrix Netscaler Application Delivery Controller. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-6548?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2023-6548 have an EU (EUVD) identifier?: Yes. CVE-2023-6548 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-58778. It is also flagged as exploited in the EUVD (since 2024-01-17).
When was CVE-2023-6548 published?: CVE-2023-6548 was published on 2024-01-17 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:*
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*
cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*

More vulnerabilities in Citrix Netscaler Application Delivery Controller

CVE-2026-88773 — Critical (CVSS 10.0): Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling') vulnerability in Citrix NetScaler ADC…
CVE-2014-2882 — Critical (CVSS 10.0): Unspecified vulnerability in the management GUI in Citrix NetScaler Application Delivery Controller (ADC) and NetScaler…
CVE-2014-2881 — Critical (CVSS 10.0): Unspecified vulnerability in the Diffie-Hellman key agreement implementation in the management GUI Java applet in…
CVE-2026-88777 — Critical (CVSS 9.8): Memory overflow vulnerability vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects…
CVE-2026-88776 — Critical (CVSS 9.8): Memory overflow vulnerability vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects…
CVE-2026-88775 — Critical (CVSS 9.8): Memory overflow vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before…

All CVEs affecting Citrix Netscaler Application Delivery Controller →

Other CWE-94 (Code Injection) vulnerabilities

CVE-2026-105857 — Critical (CVSS 10.0): Payload is a free and open source headless content management system. In @payloadcms/plugin-form-builder versions…
CVE-2026-55107 — Critical (CVSS 10.0): Kobako is a Ruby gem that embeds a Wasm-isolated mruby interpreter inside applications, allowing execution of untrusted…
CVE-2026-96349 — Critical (CVSS 10.0): Unauthenticated Remote Code Execution (RCE) in SiteSkite <= 2.1.8 versions.
CVE-2026-102425 — Critical (CVSS 10.0): Joomla Extension - balbooa.com - Unauthenticated RCE via field shortcode injection in Balbooa Forms < 2.4.3.4 - Balbooa…
CVE-2026-89275 — Critical (CVSS 10.0): Adobe Campaign Classic (ACC) is affected by an Improper Control of Generation of Code ('Code Injection') vulnerability…
CVE-2026-84412 — Critical (CVSS 10.0): Adobe Campaign Classic (ACC) is affected by an Improper Control of Generation of Code ('Code Injection') vulnerability…

Browse all CWE-94 (Code Injection) vulnerabilities →