CVE-2025-9303 Details
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.
A critical buffer overflow vulnerability has been identified in the TOTOLINK A720R router, specifically in the firmware version 4.1.5cu.630_B20250509. The vulnerability arises in the function setParentalRules within the file /cgi-bin/cstecgi.cgi. The issue is caused by improper boundary checks when the argument 'desc' is manipulated, allowing for a buffer overflow. This vulnerability can be exploited remotely by sending malicious HTTP POST requests.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Aug 21, 2025References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/lin-3-start/lin-cve/blob/main/TOTOLINK%20A720R/TOTOLINK-A720R.md | [email protected] | ExploitThird Party Advisory |
| https://github.com/lin-3-start/lin-cve/blob/main/TOTOLINK%20A720R/TOTOLINK-A720R.md#poc | [email protected] | ExploitThird Party Advisory |
| https://vuldb.com/?ctiid.320908 | [email protected] | Permissions RequiredVDB Entry |
| https://vuldb.com/?id.320908 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/?submit.632410 | [email protected] | Third Party AdvisoryVDB Entry |
| https://www.totolink.net/ | [email protected] | Third Party AdvisoryVDB Entry |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-120 | Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') | [email protected] |
| CWE-119 | Improper Restriction of Operations within the Bounds of a Memory Buffer | [email protected] |
| CWE-120 | Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| totolink a720r firmware | 4.1.5cu.630_b20250509 |
CPE
Remediation
| |
| totolink a720r | All versions |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Oct 6, 2025 | Initial Analysis | [email protected] |
| Aug 21, 2025 | New CVE Received | [email protected] |