CVE-2025-9303

Name: CVE-2025-9303
Creator: NVD / NIST
Published: 2025-08-21T15:15:37.067+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.4/10EPSS 0.77%

Last modified Jun 17, 2026

CVE-2025-9303 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. 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. EPSS estimates a 0.77% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS 4.0

7.4/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.77%

50.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Totolink	A720r Firmware	4.1.5cu.630_b20250509

References

https://github.com/lin-3-start/lin-cve/blob/main/TOTOLINK%20A720R/TOTOLINK-A720R.mdExploit, Third Party Advisory
https://github.com/lin-3-start/lin-cve/blob/main/TOTOLINK%20A720R/TOTOLINK-A720R.md#pocExploit, Third Party Advisory
https://vuldb.com/?ctiid.320908Permissions Required, VDB Entry
https://vuldb.com/?id.320908Third Party Advisory, VDB Entry
https://vuldb.com/?submit.632410Third Party Advisory, VDB Entry
https://www.totolink.net/Third Party Advisory, VDB Entry

Timeline

Published: Aug 21, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-9303?

How severe is CVE-2025-9303?

CVE-2025-9303 has a CVSS score of 7.4/10 (HIGH severity). The EPSS model estimates a 0.77% probability of exploitation in the next 30 days.

How do I fix CVE-2025-9303?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-9303?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST