RCE in Totolink A3600r
CVE-2026-5020
A vulnerability was detected in Totolink A3600R 4.1.2cu.5182_B20201102. Affected by this issue is the function setNoticeCfg of the file /cgi-bin/cstecgi.cgi of the component Parameter Handler. The manipulation of the argument NoticeUrl results in command injection. The attack may be launched remotely. The exploit is now public and may be used.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.037 (89.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.025 · newest: 0.037 · change: +0.013
Affected products
- Totolink A3600r — versions 4.1.2cu.5182_B20201102
- Totolink A3600r Firmware — versions 4.1.2cu.5182_b20201102
Weakness classification (CWE)
References
- vuldb.com/vuln/353905 (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/vuln/353905/cti (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/submit/779536 (VDB Entry, Third Party Advisory, third-party-advisory)
- lavender-bicycle-a5a.notion.site/TOTOLINK_A3600R_setNoticeCfg-32253a41781f80c19… (Exploit, Third Party Advisory, exploit)
- www.totolink.net/ (Product, product)
Frequently asked questions
- What is CVE-2026-5020?
- CVE-2026-5020 is a medium-severity vulnerability in Totolink A3600r, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.3/10. Published 2026-03-29.
- How severe is CVE-2026-5020?
- Medium severity. CVSS v3 base score is 6.3 out of 10.