CVE-2026-2548: WAYOS FBM-220G rc sub_40F820 command injection

Severity: medium (CVSS 6.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-02-16 · updated 2026-06-17
Weakness: CWE-74

Description

A flaw has been found in WAYOS FBM-220G 24.10.19. This affects the function sub_40F820 of the file rc. Executing a manipulation of the argument upnp_waniface/upnp_ssdp_interval/upnp_max_age can lead to command injection. The attack can be executed remotely. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products

WAYOS FBM-220G: 24.10.19

References

https://github.com/glkfc/IoT-Vulnerability/blob/main/wayos/wayos.md
https://vuldb.com/?ctiid.346157
https://vuldb.com/?id.346157
https://vuldb.com/?submit.749802
https://github.com/glkfc/IoT-Vulnerability/blob/main/wayos/wayos.md

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