CVE-2026-113802: Wavlink WL-WN530BE1-A Unauthenticated OS Command Injection in ioos protocol.csp ovpn_file Handler

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-20 · updated 2026-10-21
Weakness: CWE-78

Description

Wavlink WL-WN530BE1-A firmware through M30BE1_V251117 contains an OS command injection vulnerability in the sub_23B54 function of the ioos binary, which passes the unsanitized file_id parameter of /protocol.csp?opt=ovpn_file requests with type=del to popen(). A remote unauthenticated attacker can send a forged IP-FROM: 127.0.0.1 header to bypass login and execute arbitrary commands as root.

Affected products

Wavlink WL-WN530BE1-A: M30BE1_V251117

References

https://github.com/F-yyjy/cve/blob/main/WN530BE1(en).md
https://www.vulncheck.com/advisories/wavlink-wl-wn530be1-a-unauthenticated-os-command-injection-in-ioos-protocol-csp-ovpn-file-handler

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