Critical severity · published Aug 21, 2025
CVE-2025-9303
A security flaw has been discovered in TOTOLINK A720R 4.1.5cu.630_B20250509
9.8
CVSS
0.9%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 59% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AF
A720r Firmware · Totolink
4.1.5cu.630_b20250509 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-9303
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-9303
Exploit
https://github.com/lin-3-start/lin-cve/blob/main/TOTOLINK%20A720R/TOTOLINK-A720R.md
Exploit
https://github.com/lin-3-start/lin-cve/blob/main/TOTOLINK%20A720R/TOTOLINK-A720R.md#poc
Permissions Required
https://vuldb.com/?ctiid.320908
Third Party Advisory
https://vuldb.com/?id.320908
Third Party Advisory
https://vuldb.com/?submit.632410
Third Party Advisory
https://www.totolink.net/
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