How severe is CVE-2025-6139?

CVE-2025-6139 has a CVSS 3.x base score of 3.9, rated low severity. It is exploitable over an adjacent network with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2025-6139 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-6139?

CVE-2025-6139 affects Totolink T10 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-6139?

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

Does CVE-2025-6139 have an EU (EUVD) identifier?

Yes. CVE-2025-6139 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-18435.

When was CVE-2025-6139 published?

CVE-2025-6139 was published on 2025-06-16 and last updated on 2026-06-17.

CVE-2025-6139

CVE-2025-6139 is a low-severity vulnerability in Totolink T10 Firmware with a CVSS 3.x base score of 3.9. 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-255.

Key facts

Severity: Low (CVSS 3.x base score 3.9)
CVSS v2: 3.7
CVSS v4: 1.1
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-18435
Weakness: CWE-255
Affected product: Totolink T10 Firmware
Published: 2025-06-16
Last modified: 2026-06-17

Description

A vulnerability, which was classified as problematic, has been found in TOTOLINK T10 4.1.8cu.5207. Affected by this issue is some unknown functionality of the file /etc/shadow.sample. The manipulation leads to use of hard-coded password. The attack can only be initiated within the local network. The complexity of an attack is rather high. The exploitation is known to be difficult. The exploit has been disclosed to the public and may be used.

Frequently asked questions

What is CVE-2025-6139?: A vulnerability, which was classified as problematic, has been found in TOTOLINK T10 4.1.8cu.5207. Affected by this issue is some unknown functionality of the file /etc/shadow.sample. The manipulation leads to use of hard-coded password. The attack can only be initiated within the local network. The complexity of an attack is rather high. The exploitation is known to be difficult. The exploit has been disclosed to the public and may be used.
How severe is CVE-2025-6139?: CVE-2025-6139 has a CVSS 3.x base score of 3.9, rated low severity. It is exploitable over an adjacent network with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2025-6139 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-6139?: CVE-2025-6139 affects Totolink T10 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-6139?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-6139 have an EU (EUVD) identifier?: Yes. CVE-2025-6139 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-18435.
When was CVE-2025-6139 published?: CVE-2025-6139 was published on 2025-06-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:totolink:t10_firmware:4.1.8cu.5207_b20210320:*:*:*:*:*:*:*

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