WAGO: Vulnerabilities in Managed Switch
Several vulnerabilities have been identified in the WAGO 852‑1328 device's web‑based management interface, which is implemented using a modified lighttpd server and custom CGI binaries. These issues include multiple stack buffer overflows, an authentication bypass, and insecure credential storage.
describes (4)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-22906US | —OT elevated | — | ||
User credentials are stored using AES‑ECB encryption with a hardcoded key. An unauthenticated remote attacker obtaining the configuration file can decrypt and recover plaintext use… | ||||
| CVE-2026-22905US | — | — | ||
An unauthenticated remote attacker can bypass authentication by exploiting insufficient URI validation and using path traversal sequences (e.g., /js/../cgi-bin/post.cgi), gaining u… | ||||
| CVE-2026-22904US | — | — | ||
Improper length handling when parsing multiple cookie fields (including TRACKID) allows an unauthenticated remote attacker to send oversized cookie values and trigger a stack buffe… | ||||
| CVE-2026-22903US | — | — | ||
An unauthenticated remote attacker can send a crafted HTTP request containing an overly long SESSIONID cookie. This can trigger a stack buffer overflow in the modified lighttpd ser… | ||||
references
External citations — patches, advisories, analysis.
remediations (4)
- Fixed
Please update your devices to the specified fixed firmware version 02.65.
- Fixed
Please update your devices to the specified fixed firmware version 02.65.
- Fixed
Please update your devices to the specified fixed firmware version 02.65.
- Fixed
Please update your devices to the specified fixed firmware version 02.65.
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