How severe is CVE-2022-27518?

CVE-2022-27518 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2022-27518 being actively exploited?

Yes. CVE-2022-27518 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-12-13, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2022-27518?

CVE-2022-27518 primarily affects Citrix Application Delivery Controller Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-27518?

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-2022-27518 have an EU (EUVD) identifier?

Yes. CVE-2022-27518 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2022-32019. It is also flagged as exploited in the EUVD (since 2022-12-13).

When was CVE-2022-27518 published?

CVE-2022-27518 was published on 2022-12-13 and last updated on 2026-06-17.

CVE-2022-27518

CVE-2022-27518 is a critical-severity vulnerability in Citrix Application Delivery Controller Firmware with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-12-13). The underlying weakness is classified as CWE-664.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 7% (93rd percentile)
Actively exploited: Yes — listed in CISA KEV (added 2022-12-13)
EU (EUVD) id: EUVD-2022-32019
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2022-12-13)
Weakness: CWE-664
Affected product: Citrix Application Delivery Controller Firmware
Published: 2022-12-13
Last modified: 2026-06-17

Description

Unauthenticated remote arbitrary code execution

Frequently asked questions

What is CVE-2022-27518?: Unauthenticated remote arbitrary code execution
How severe is CVE-2022-27518?: CVE-2022-27518 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-27518 being actively exploited?: Yes. CVE-2022-27518 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-12-13, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2022-27518?: CVE-2022-27518 primarily affects Citrix Application Delivery Controller Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-27518?: 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-2022-27518 have an EU (EUVD) identifier?: Yes. CVE-2022-27518 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2022-32019. It is also flagged as exploited in the EUVD (since 2022-12-13).
When was CVE-2022-27518 published?: CVE-2022-27518 was published on 2022-12-13 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:o:citrix:application_delivery_controller_firmware:*:*:*:*:fips:*:*:*
cpe:2.3:o:citrix:application_delivery_controller_firmware:*:*:*:*:ndcpp:*:*:*
cpe:2.3:o:citrix:application_delivery_controller_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:citrix:gateway_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Citrix Application Delivery Controller Firmware

CVE-2022-27510 — Critical (CVSS 9.8): Unauthorized access to Gateway user capabilities
CVE-2019-19781 — Critical (CVSS 9.8): An issue was discovered in Citrix Application Delivery Controller (ADC) and Gateway 10.5, 11.1, 12.0, 12.1, and 13.0.…
CVE-2019-18225 — Critical (CVSS 9.8): An issue was discovered in Citrix Application Delivery Controller (ADC) and Gateway before 10.5 build 70.8, 11.x before…
CVE-2018-7218 — Critical (CVSS 9.8): The AppFirewall functionality in Citrix NetScaler Application Delivery Controller and NetScaler Gateway 10.5 before…
CVE-2020-8247 — High (CVSS 8.8): Citrix ADC and Citrix Gateway 13.0 before 13.0-64.35, Citrix ADC and NetScaler Gateway 12.1 before 12.1-58.15, Citrix…
CVE-2020-8197 — High (CVSS 8.8): Privilege escalation vulnerability on Citrix ADC and Citrix Gateway versions before 13.0-58.30, 12.1-57.18, 12.0-63.21,…

All CVEs affecting Citrix Application Delivery Controller Firmware →

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CVE-2022-20856 — High (CVSS 8.6): A vulnerability in the processing of Control and Provisioning of Wireless Access Points (CAPWAP) Mobility messages in…
CVE-2016-8763 — High (CVSS 7.8): The TrustZone driver in Huawei P9 phones with software Versions earlier than EVA-AL10C00B352 and P9 Lite with software…
CVE-2024-41169 — High (CVSS 7.5): The attacker can use the raft server protocol in an unauthenticated way. The attacker can see the server's resources,…

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