CVE-2022-50926
Published: 13 January 2026
Summary
CVE-2022-50926 is a high-severity Reliance on Cookies without Validation and Integrity Checking (CWE-565) vulnerability in Wago (inferred from references). Its CVSS base score is 8.7 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 37.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 AC-3 (Access Enforcement) and SC-23 (Session Authenticity).
Deeper analysis
CVE-2022-50926 is a privilege escalation vulnerability (CWE-565) in the WAGO 750-8212 PFC200 G2 2ETH RS firmware. It enables attackers to manipulate user session cookies by modifying the 'name' and 'roles' parameters, allowing elevation from ordinary user to administrative privileges without authentication. The issue carries a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) and was published on 2026-01-13.
Attackers with network access can exploit this vulnerability remotely with low complexity and no prior privileges or user interaction required. Successful exploitation grants administrative privileges, enabling high-impact compromise of confidentiality, integrity, and availability on the affected device.
Advisories and mitigation guidance are detailed in resources from Vulncheck at https://www.vulncheck.com/advisories/wago-pfc-g-eth-rs-privilege-escalation and the WAGO website at https://www.wago.com. A public proof-of-concept exploit is available at https://www.exploit-db.com/exploits/50793.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-2629
Vulnerability details
WAGO 750-8212 PFC200 G2 2ETH RS firmware contains a privilege escalation vulnerability that allows attackers to manipulate user session cookies. Attackers can modify the cookie's 'name' and 'roles' parameters to elevate from ordinary user to administrative privileges without authentication.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
The vulnerability allows remote exploitation of a public-facing web interface on the device firmware to manipulate session cookies for privilege escalation to admin without authentication.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
AC-3 enforces server-side access control policies to prevent privilege escalation from manipulated client-side session cookies claiming unauthorized roles.
SC-23 protects session authenticity, mitigating manipulation of session cookies to elevate user privileges without authentication.
SI-10 validates information inputs such as session cookie 'name' and 'roles' parameters to block tampering attempts.