CVE-2025-4999

Name: CVE-2025-4999
Creator: NVD / NIST
Published: 2025-05-20T21:15:24.083+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 11.32%

Last modified Jun 17, 2026

CVE-2025-4999 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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. EPSS estimates a 11.32% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

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

CVSS 4.0

5.3/10

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:X/V:X/RE:X/U:X

EPSS Probability

11.32%

95.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Linksys	Fgw3000-Ah Firmware	<= 1.0.17.000000
Linksys	Fgw3000-Hk Firmware	<= 1.0.17.000000

References

https://github.com/CH13hh/tmp_store_cc/blob/main/FGW3000/1.mdBroken Link
https://vuldb.com/?ctiid.309650Permissions Required, VDB Entry
https://vuldb.com/?id.309650Third Party Advisory, VDB Entry
https://vuldb.com/?submit.565909Third Party Advisory, VDB Entry
https://www.linksys.com/Product

Timeline

Published: May 20, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-4999?

How severe is CVE-2025-4999?

CVE-2025-4999 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 11.32% probability of exploitation in the next 30 days.

How do I fix CVE-2025-4999?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-4999?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST