Auth bypass in Kaysus Ks-Wr3600
CVE-2025-68717
KAYSUS KS-WR3600 routers with firmware 1.0.5.9.1 allow authentication bypass during session validation. If any user is logged in, endpoints such as /cgi-bin/system-tool accept unauthenticated requests with empty or invalid session values. This design flaw lets attackers piggyback on another user's active session to retrieve sensitive configuration data or execute privileged actions without authentication.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.4 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L.
EPSS exploit prediction
EPSS: 0.006 (45.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.000
Affected products
- Kaysus Ks-Wr3600
- Kaysus Ks-Wr3600 Firmware — versions 1.0.5.9.1
Weakness classification (CWE)
References
- www.kaysus.com/ks_wr3600__wifi_7_be3600_wireless_router.html (Product)
- github.com/actuator/cve/tree/main/KAYSUS (Exploit)
- github.com/actuator/cve/blob/main/KAYSUS/CVE-2025-68717.txt (Third Party Advisory)
Frequently asked questions
- What is CVE-2025-68717?
- CVE-2025-68717 is a critical-severity vulnerability in Kaysus Ks-Wr3600, classified under Improper Authentication. CVSS score: 9.4/10. Published 2026-01-08.
- How severe is CVE-2025-68717?
- Critical severity. CVSS v3 base score is 9.4 out of 10.