What’s Vulnerable › Vulnerabilities

CVE-2025-4999: Linksys FGW3000-AH/FGW3000-HK HTTP POST Request sysconf.cgi sub_4153FC command injection

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 6.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-05-20 · updated 2026-06-17
• Weakness: CWE-74

Description

A vulnerability was found in Linksys FGW3000-AH and FGW3000-HK up to 1.0.17.000000 and classified as critical. Affected by this issue is the function sub_4153FC of the file /cgi-bin/sysconf.cgi of the component HTTP POST Request Handler. The manipulation of the argument supplicant_rnd_id_en leads to command injection. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products

• Linksys Fgw3000-Ah Firmware: through 1.0.17.000000
• Linksys Fgw3000-Hk Firmware: through 1.0.17.000000

References

• https://github.com/CH13hh/tmp_store_cc/blob/main/FGW3000/1.md
• https://vuldb.com/?ctiid.309650
• https://vuldb.com/?id.309650
• https://vuldb.com/?submit.565909
• https://www.linksys.com/

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