Security readout for executives and security teams
Plain-English summary
This is a critical Citrix Gateway/ADC flaw that can let an unauthenticated remote attacker run arbitrary code. These systems often sit at the network edge, so compromise could expose remote access paths and disrupt operations. CISA KEV listing confirms known exploitation.
Executive priority
Treat this as urgent remediation for any exposed Citrix Gateway or ADC. The combination of unauthenticated RCE, edge-device exposure, critical CVSS, and KEV listing makes delayed action a material operational risk.
Technical view
CVE-2022-27518 is unauthenticated remote arbitrary code execution in Citrix Gateway and Citrix ADC. The bundle lists CVSS 9.8, network attack vector, no privileges, no user interaction, and high confidentiality, integrity, and availability impact. CWE is CWE-664.
Likely exposure
Exposure is likely for internet-facing Citrix Gateway or Citrix ADC deployments running listed affected versions: 12.1, 13.0, or 12.1 FIPS/NDcPP. The bundle does not prove other versions are affected.
Exploitation context
Active exploitation is supported by CISA KEV. The supplied sources do not include exploit mechanics, campaign details, or indicators of compromise, so those should be obtained from Citrix and trusted incident-response sources.
Researcher notes
The evidence supports critical severity and known exploitation, but the prompt bundle does not provide fixed build numbers, indicators, or root-cause detail. Avoid assuming product scope beyond the named Citrix Gateway and ADC versions.
Mitigation direction
- Identify all Citrix Gateway and Citrix ADC appliances immediately.
- Compare deployed versions against Citrix advisory CTX474995.
- Apply Citrix-provided fixes or mitigations from CTX474995.
- Prioritize internet-facing and remote-access appliances first.
- Review CISA KEV remediation expectations for due-date handling.
Validation and detection
- Inventory Citrix Gateway and ADC assets, including FIPS and NDcPP builds.
- Verify software versions against the affected list and Citrix advisory.
- Confirm whether appliances are internet-facing or otherwise externally reachable.
- Check change records for Citrix advisory remediation completion.
- Review security logs using vendor-provided detection guidance if available.
Public sources used
Michael Williams reviewed this cited source version on .
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-664: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2022-27518 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://support.citrix.com/article/CTX474995CVE reference
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-27518CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Control of a Resource Through its Lifetime
Improper Control of a Resource Through its Lifetime represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.