How severe is CVE-2025-5902?

CVE-2025-5902 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-2025-5902 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-5902?

CVE-2025-5902 affects Totolink T10 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-5902?

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-2025-5902 have an EU (EUVD) identifier?

Yes. CVE-2025-5902 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-17589.

When was CVE-2025-5902 published?

CVE-2025-5902 was published on 2025-06-09 and last updated on 2026-06-17.

CVE-2025-5902

CVE-2025-5902 is a high-severity vulnerability in Totolink T10 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: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-17589
Weakness: CWE-120
Affected product: Totolink T10 Firmware
Published: 2025-06-09
Last modified: 2026-06-17

Description

A vulnerability was found in TOTOLINK T10 4.1.8cu.5207 and classified as critical. This issue affects the function setUpgradeFW of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. The manipulation of the argument slaveIpList leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

Frequently asked questions

What is CVE-2025-5902?: A vulnerability was found in TOTOLINK T10 4.1.8cu.5207 and classified as critical. This issue affects the function setUpgradeFW of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. The manipulation of the argument slaveIpList leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.
How severe is CVE-2025-5902?: CVE-2025-5902 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-2025-5902 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-5902?: CVE-2025-5902 affects Totolink T10 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-5902?: 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-2025-5902 have an EU (EUVD) identifier?: Yes. CVE-2025-5902 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-17589.
When was CVE-2025-5902 published?: CVE-2025-5902 was published on 2025-06-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:totolink:t10_firmware:4.1.8cu.5207:*:*:*:*:*:*:*

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