Vulnerability · Published Apr 6, 2026 · Assigned by VulDB

CVE-2026-5608Belkin F9K1122 formWlanSetup stack-based overflow

High 8.8

In plain English

A high-severity stack buffer overflow in F9K1122 from Belkin. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 55% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.7%top 45.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability was detected in Belkin F9K1122 1.00.33. Affected is the function formWlanSetup of the file /goform/formWlanSetup. The manipulation of the argument webpage results in stack-based buffer overflow. The attack may be performed from remote. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products (as reported)

Vendor	Product	Versions
Belkin	F9K1122	1.00.33

Weakness: CWE-121, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

References

VDB-355399 | Belkin F9K1122 formWlanSetup stack-based overflow vdb-entry, technical-description
VDB-355399 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #785315 | Belkin F9K1122 1.00.33 Stack-based Buffer Overflow third-party-advisory
https://github.com/Litengzheng/vul_db/blob/main/Belkin/vul_80/README.md exploit