CVE-2022-50926

CriticalPublic PoC

Published: 13 January 2026

Published

13 January 2026

Modified

15 April 2026

KEV Added

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Patch

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CVSS Score 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0014 33.7th percentile

Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2022-50926 is a critical-severity Reliance on Cookies without Validation and Integrity Checking (CWE-565) vulnerability in Wago (inferred from references). Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 33.7th 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).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190) and 1 other technique. What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

AC-3 Access Enforcement good match

prevent

AC-3 enforces server-side access control policies to prevent privilege escalation from manipulated client-side session cookies claiming unauthorized roles.

SC-23 Session Authenticity good match

prevent

SC-23 protects session authenticity, mitigating manipulation of session cookies to elevate user privileges without authentication.

SI-10 Information Input Validation good match

prevent

SI-10 validates information inputs such as session cookie 'name' and 'roles' parameters to block tampering attempts.

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

T1068 Exploitation for Privilege Escalation Privilege Escalation

Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.

attack.mitre.org →

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.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

NVD Description

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.

Deeper analysisAI

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.