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Vulnerability record · CVE-2025-4999 · published 20 May 2025

CVE-2025-4999: Linksys fgw3000-ah firmware injection vulnerability

Linksys · Fgw3000 Ah Firmware

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.

5.3 CVSS 4.0 Medium EPSS 7.1% · top 6.0% CWE-74 · InjectionCWE-77 · Command injection
5.3CVSS 4.0 base score, v2 6.5
7.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
5References
17 Jun 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/CH13hh/tmp_store_cc/blob/main/FGW3000/1.md Broken Link
https://vuldb.com/?ctiid.309650 Permissions RequiredVDB Entry
https://vuldb.com/?id.309650 Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.565909 Third Party AdvisoryVDB Entry
https://www.linksys.com/ Product

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Source: NIST National Vulnerability Database (record CVE-2025-4999), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.