Information disclosure in Totolink A720r
CVE-2025-4271
A vulnerability was found in TOTOLINK A720R 4.1.5cu.374. It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument topicurl with the input showSyslog leads to information disclosure. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.006 (47.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 47.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Totolink A720r — versions 4.1.5cu.374
- Totolink A720r Firmware — versions 4.1.5cu.374
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/at0de/my_vulns/blob/main/TOTOLINK/A720R/showSyslog.md (Exploit, exploit)
- www.totolink.net/ (Product, product)
Frequently asked questions
- What is CVE-2025-4271?
- CVE-2025-4271 is a medium-severity vulnerability in Totolink A720r, classified under Information Disclosure. CVSS score: 5.3/10. Published 2025-05-05.
- How severe is CVE-2025-4271?
- Medium severity. CVSS v3 base score is 5.3 out of 10.