Unauthenticated remote arbitrary code execution
- Published
- Dec 13, 2022
- Updated
- Jun 17, 2026
- EPSS
- 6.7% · 94th percentile
- CWE
- CWE-664
Sign in to follow · You’ll be notified if a followed record enters KEV, gets an exploit or is updated.
Report tools
Action score
71
This week
Don’t wait for the next maintenance window.
- CVSS
- 39 / 40 · 9.8 / 10
- CISA KEV
- 30 / 30 · Listed
- EPSS
- 2 / 30 · 6.7%
CISA SSVC decision
- Exploitation
- active
- Automatable
- yes
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 9.8
- CNA · Citrix
- 9.8
- agree
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Actively exploited in the wild
CISA added this to its Known Exploited Vulnerabilities catalog on Dec 13, 2022. That signals real attacks, not theory.
Remediation deadline for government agencies: Jan 3, 2023.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| citrix | application delivery controller firmware | cpe:2.3:o:citrix:application_delivery_controller_firmware |
| citrix | application delivery controller | cpe:2.3:h:citrix:application_delivery_controller |
| citrix | gateway firmware | cpe:2.3:o:citrix:gateway_firmware |
| citrix | gateway | cpe:2.3:h:citrix:gateway |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- citrix application delivery controller firmware12.1 and later · before 12.1-55.291
- citrix application delivery controller firmware12.1 and later · before 12.1-65.25
- citrix application delivery controller firmware13.0 and later · before 13.0-58.32
- citrix gateway firmware12.1 and later · before 12.1-65.25
- citrix gateway firmware13.0 and later · before 13.0-58.32
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Citrix). Independent of NVD's CPE analysis and usually ahead of it.
Citrix Citrix Gateway, Citrix ADC
- 12.1, 13.0, 12.1 FIPs, NDcPPaffected
Same product
citrix: all recordsOther highest-scoring records for the same primary product.
- CVE-2019-19781An issue was discovered in Citrix Application Delivery Controller (ADC) and Gateway 10.5, 11.1, 12.0, 12.1, and 13.0.KEV99Now
- CVE-2020-8193Improper access control in Citrix ADC and Citrix Gateway versions before 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 and CKEV83Now
- CVE-2020-8195Improper input validation in Citrix ADC and Citrix Gateway versions before 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 andKEV66This week
- CVE-2020-8196Improper access control in Citrix ADC and Citrix Gateway versions before 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 and CKEV55Plan
- CVE-2018-7218The AppFirewall functionality in Citrix NetScaler Application Delivery Controller and NetScaler Gateway 10.5 before Build 68.7, 11.0 before 41Plan
- CVE-2019-18225An issue was discovered in Citrix Application Delivery Controller (ADC) and Gateway before 10.5 build 70.8, 11.x before 11.1 build 63.9, 12.39Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
Weaponized
A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.
Evidence
- Proof-of-concept repository on GitHub ×1
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Proof-of-concept repository on GitHub | stars:2 | 2023-01-17 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- CISA KEV-1 d
- Published
- First PoC+34 d
- TodaySep 30, 2026+1387 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-664 · Improper Control of a Resource Through its LifetimeCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Session Credential Falsification through ForgingCAPEC-196likelihood: Medium · Medium
- Exploitation of Trusted IdentifiersCAPEC-21likelihood: High · High
- Reusing Session IDs (aka Session Replay)CAPEC-60likelihood: High · High
- Session FixationCAPEC-61likelihood: Medium · High
- Cross Site Request ForgeryCAPEC-62likelihood: High · Very High
ATT&CK techniques
- Access Token ManipulationT1134
- Access Token Manipulation:Token Impersonation/TheftT1134.001
- Access Token Manipulation: Create Process with TokenT1134.002
- Access Token Manipulation: Make and Impersonate TokenT1134.003
- Steal Application Access TokenT1528
- Steal Web Session CookieT1539
- Use Alternate Authentication Material:Web Session CookieT1550.004
- Forge Web CredentialsT1606
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
- support.citrix.com/article/CTX474995
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-27518
Vendor advisories and official records. Exploit/PoC links are deliberately left out.