# CVE-2022-27518: Citrix Application Delivery Controller (ADC) and Gateway Authentication Bypass

> Unauthenticated attackers can execute arbitrary code remotely on Citrix ADC and Gateway devices, requiring immediate patching.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Yes, since 13 Dec 2022 (CISA KEV)
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 13 Dec 2022
- **Updated:** 21 Oct 2025
- **Also known as:** GHSA-w8vh-3g88-rg95

## What is CVE-2022-27518?

CVE-2022-27518 is a critical code injection vulnerability in Citrix Gateway, Citrix ADC, published on 13 Dec 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Unauthenticated remote arbitrary code execution

Weakness: CWE-664 (Improper Control of a Resource Through its Lifetime)

## Which versions are affected by CVE-2022-27518?

It affects 2 products.


Products: Citrix Application Delivery Controller Firmware, Citrix Gateway Firmware.

## How do I fix CVE-2022-27518?

No fix has been published for CVE-2022-27518 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 3 Jan 2023.

## Is CVE-2022-27518 being exploited?

Yes. Attackers have exploited CVE-2022-27518 in the wild since at least 13 Dec 2022.

Public exploit code:

- A POC on how to exploit CVE-2022-27518  (github_poc): https://github.com/dolby360/CVE-2022-27518_POC

## Other vulnerabilities in Citrix Gateway, Citrix ADC

- [CVE-2019-19781](https://insights.sbomify.com/CVE-2019-19781/): Citrix ADC, Gateway, and SD-WAN WANOP Appliance Code Execution (critical 9.8, exploited in the wild)
- [CVE-2020-8193](https://insights.sbomify.com/CVE-2020-8193/): Citrix ADC, Gateway, and SD-WAN WANOP Appliance Authorization Bypass (medium 6.5, exploited in the wild)
- [CVE-2020-8195](https://insights.sbomify.com/CVE-2020-8195/): Citrix ADC, Gateway, and SD-WAN WANOP Appliance Information Disclosure (medium 6.5, exploited in the wild)
- [CVE-2020-8196](https://insights.sbomify.com/CVE-2020-8196/): Citrix ADC, Gateway, and SD-WAN WANOP Appliance Information Disclosure (medium 4.3, exploited in the wild)
- [CVE-2022-27510](https://insights.sbomify.com/CVE-2022-27510/): Unauthorized access to Gateway user capabilities (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-27518 and fix it if it is affected.

What it is: CVE-2022-27518 is a critical code injection vulnerability in Citrix Gateway, Citrix ADC, published on 13 Dec 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: Yes. Attackers have exploited CVE-2022-27518 in the wild since at least 13 Dec 2022.

Affected product: Citrix Gateway, Citrix ADC. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2022-27518/ (Markdown: https://insights.sbomify.com/CVE-2022-27518/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-27518
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-27518
- OSV: https://osv.dev/vulnerability/CVE-2022-27518

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-27518/
Summaries are generated and may contain mistakes; the official description above is the record.