RCE in Totolink A7000r
CVE-2026-1548
A flaw has been found in Totolink A7000R 4.1cu.4154. This impacts the function CloudACMunualUpdateUserdata of the file /cgi-bin/cstecgi.cgi. This manipulation of the argument url causes command injection. The attack can be initiated remotely. The exploit has been published 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: 0.035 (88.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 88.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.032 · newest: 0.035 · change: +0.003
Affected products
- Totolink A7000r — versions 4.1cu.4154
- Totolink A7000r Firmware — versions 4.1cu.4154
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/A7000R/02_RCE_CloudACMunualUpdateU… (Exploit, Third Party Advisory, exploit, patch)
- github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/A7000R/02_RCE_CloudACMunualUpdateU… (Exploit, exploit, patch)
- www.totolink.net/ (Product, product)
Frequently asked questions
- What is CVE-2026-1548?
- CVE-2026-1548 is a medium-severity vulnerability in Totolink A7000r, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.3/10. Published 2026-01-28.
- How severe is CVE-2026-1548?
- Medium severity. CVSS v3 base score is 6.3 out of 10.