CVE-2025-4999: fgw3000-ah Injection (CVSS 6.3)

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.

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CVSS v3.1 Score

6.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Weakness Type (CWE)

CWE-74 CWE-74

CWE-77 CWE-77

Affected Products

Vendor	Product	Versions
linksys	fgw3000-ah_firmware	< 1.0.17.000000
linksys	fgw3000-ah	All
linksys	fgw3000-hk_firmware	< 1.0.17.000000
linksys	fgw3000-hk	All

References

Other 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/

Frequently Asked Questions

What is CVE-2025-4999? +

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. It has a CVSS v3.1 base score of 6.3 (MEDIUM).

How severe is CVE-2025-4999? +

CVE-2025-4999 has a CVSS v3.1 score of 6.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-4999? +

CVE-2025-4999 affects products from linksys, specifically: fgw3000-ah, fgw3000-ah_firmware, fgw3000-hk, fgw3000-hk_firmware. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-4999? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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