How severe is CVE-2025-9303?

CVE-2025-9303 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-9303 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-9303?

CVE-2025-9303 affects Totolink A720r Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-9303?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-9303 have an EU (EUVD) identifier?

Yes. CVE-2025-9303 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-25432.

When was CVE-2025-9303 published?

CVE-2025-9303 was published on 2025-08-21 and last updated on 2026-06-17.

CVE-2025-9303

CVE-2025-9303 is a high-severity vulnerability in Totolink A720r Firmware with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-120.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
CVSS v4: 7.4
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-25432
Weakness: CWE-120
Affected product: Totolink A720r Firmware
Published: 2025-08-21
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-9303?: 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.
How severe is CVE-2025-9303?: CVE-2025-9303 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-9303 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-9303?: CVE-2025-9303 affects Totolink A720r Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-9303?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-9303 have an EU (EUVD) identifier?: Yes. CVE-2025-9303 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-25432.
When was CVE-2025-9303 published?: CVE-2025-9303 was published on 2025-08-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:totolink:a720r_firmware:4.1.5cu.630_b20250509:*:*:*:*:*:*:*

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