CVE-2022-27518 Citrix Application Delivery Controller (ADC) and Gateway: login or permission bypass
In plain words: A door that should be locked is not: part of the system can be reached without a valid login or permission. The attacker gets in as a user or administrator without knowing a password.
Confirmed exploited by CISA on · US federal patch deadline Jan 3, 2023
What to do
- Install Citrix's security update for Application Delivery Controller (ADC) and Gateway. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Patch edge devices first — attackers often start scanning for them within hours of a fix.
- Never expose the device's admin page to the internet.
- After patching a device that was exposed, follow the vendor's compromise checks, end active sessions and change passwords.
Who is affected
Work IT. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.
What's at risk: They face the internet and guard the whole network, so a flaw here can hand attackers a way in — and these devices usually run no antivirus, so break-ins go unnoticed.
The details
- Official name
- Citrix Application Delivery Controller (ADC) and Gateway Authentication Bypass Vulnerability
- Product
- Citrix Application Delivery Controller (ADC) and Gateway
- CISA description
- Citrix Application Delivery Controller (ADC) and Gateway, when configured with SAML SP or IdP configuration, contain an authentication bypass vulnerability that allows an attacker to execute code as administrator.
- Type of flaw
- Login or permission bypass (CWE-664)
- Confirmed exploited
- Dec 13, 2022
- US federal patch deadline
- Jan 3, 2023
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Answering about CVE-2022-27518 ·
Questions about CVE-2022-27518
Is CVE-2022-27518 being exploited?
Yes. CISA added CVE-2022-27518 to its Known Exploited Vulnerabilities catalog on Dec 13, 2022, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2022-27518?
Install Citrix's security update for Application Delivery Controller (ADC) and Gateway. If no update exists, follow the vendor's workaround or stop using the product until one ships. Patch edge devices first — attackers often start scanning for them within hours of a fix.
Am I affected by CVE-2022-27518?
Only if you use Citrix Application Delivery Controller (ADC) and Gateway. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.