How severe is CVE-2025-4271?

CVE-2025-4271 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2025-4271 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-4271?

CVE-2025-4271 affects Totolink A720r Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-4271?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-4271 have an EU (EUVD) identifier?

Yes. CVE-2025-4271 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-13368.

When was CVE-2025-4271 published?

CVE-2025-4271 was published on 2025-05-05 and last updated on 2026-06-17.

CVE-2025-4271

CVE-2025-4271 is a medium-severity vulnerability in Totolink A720r Firmware with a CVSS 3.x base score of 5.3. 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-200.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
CVSS v4: 6.9
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-13368
Weakness: CWE-200
Affected product: Totolink A720r Firmware
Published: 2025-05-05
Last modified: 2026-06-17

Description

A vulnerability was found in TOTOLINK A720R 4.1.5cu.374. It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument topicurl with the input showSyslog leads to information disclosure. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.

Frequently asked questions

What is CVE-2025-4271?: A vulnerability was found in TOTOLINK A720R 4.1.5cu.374. It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument topicurl with the input showSyslog leads to information disclosure. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.
How severe is CVE-2025-4271?: CVE-2025-4271 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2025-4271 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-4271?: CVE-2025-4271 affects Totolink A720r Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-4271?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-4271 have an EU (EUVD) identifier?: Yes. CVE-2025-4271 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-13368.
When was CVE-2025-4271 published?: CVE-2025-4271 was published on 2025-05-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:totolink:a720r_firmware:4.1.5cu.374:*:*:*:*:*:*:*

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