Vulnerability · Published Aug 21, 2025 · Assigned by VulDB
CVE-2025-9303TOTOLINK A720R cstecgi.cgi setParentalRules buffer overflow
High 8.8
In plain English
A high-severity buffer overflow in A720R from TOTOLINK. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 60% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.9%top 40.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A security flaw has been discovered in TOTOLINK A720R 4.1.5cu.630_B20250509. This issue affects the function setParentalRules of the file /cgi-bin/cstecgi.cgi. Performing manipulation of the argument desc results in buffer overflow. The attack is possible to be carried out remotely. The exploit has been released to the public and may be exploited.
Affected products (as reported)
Weakness: CWE-120, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
References
- VDB-320908 | TOTOLINK A720R cstecgi.cgi setParentalRules buffer overflow vdb-entry, technical-description
- VDB-320908 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #632410 | TOTOLINK A720R V4.1.5cu.630_B20250509 Buffer Overflow third-party-advisory
- https://github.com/lin-3-start/lin-cve/blob/main/TOTOLINK%20A720R/TOTOLINK-A720R.md related
- https://github.com/lin-3-start/lin-cve/blob/main/TOTOLINK%20A720R/TOTOLINK-A720R.md#poc exploit
- https://www.totolink.net/ product