Home/CVE/Citrix Application Delivery Controller (ADC) and Gateway Authentication Bypass Vulnerability
CVE

CVE-2022-27518

Citrix Application Delivery Controller (ADC) and Gateway Authentication Bypass Vulnerability

Unauthenticated remote arbitrary code execution.

CRITICAL · CVSS 9.8 ⚠ CISA KEV EPSS 0.27687
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  • Listed on CISA KEV (known exploited in the wild)
  • SSVC exploitation status: active
  • EPSS ≥ 0.10 - elevated exploitation probability
  • EPSS percentile: top 3% of all CVEs by exploitation likelihood
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules1 YARA rules0
⬢

Required Remediation

Apply updates per vendor instructions.

⬡

Weakness Classification

CWE-664Improper Control of a Resource Through its Lifetime
▤

Affected Products & Versions

5
citrix application delivery controller firmware>= 12.1 and < 12.1-55.291
citrix application delivery controller firmware>= 12.1 and < 12.1-65.25
citrix application delivery controller firmware>= 13.0 and < 13.0-58.32
citrix gateway firmware>= 12.1 and < 12.1-65.25
citrix gateway firmware>= 13.0 and < 13.0-58.32
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumAzure Application Gateway Modified or Deleted
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Scoring & Timeline

9.8
CRITICAL · CVSS v3.1 · secure@citrix.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD13 Dec 2022 · 05:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
yes
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

1
cisaKEV-CVE-2022-27518
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://support.citrix.com/article/CTX474995Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-27518US Government Resource
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