Buffer overflow in Belkin F9k1122
CVE-2026-5608
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.011 (63.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 63.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.011 · change: +0.003
Affected products
- Belkin F9k1122 — versions 1.00.33
- Belkin F9k1122 Firmware — versions 1.00.33
Weakness classification (CWE)
References
- vuldb.com/vuln/355399 (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/vuln/355399/cti (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/submit/785315 (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/Litengzheng/vul_db/blob/main/Belkin/vul_80/README.md (Exploit, Third Party Advisory, exploit)
Frequently asked questions
- What is CVE-2026-5608?
- CVE-2026-5608 is a high-severity vulnerability in Belkin F9k1122, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2026-04-06.
- How severe is CVE-2026-5608?
- High severity. CVSS v3 base score is 8.8 out of 10.