How severe is CVE-2025-9091?

CVE-2025-9091 has a CVSS 3.x base score of 2.5, rated low severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2025-9091 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-9091?

CVE-2025-9091 affects Tenda Ac20 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-9091?

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

Does CVE-2025-9091 have an EU (EUVD) identifier?

Yes. CVE-2025-9091 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-25104.

When was CVE-2025-9091 published?

CVE-2025-9091 was published on 2025-08-17 and last updated on 2026-06-17.

CVE-2025-9091

CVE-2025-9091 is a low-severity vulnerability in Tenda Ac20 Firmware with a CVSS 3.x base score of 2.5. 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-259.

Key facts

Severity: Low (CVSS 3.x base score 2.5)
CVSS v2: 1.0
CVSS v4: 1.1
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-25104
Weakness: CWE-259
Affected product: Tenda Ac20 Firmware
Published: 2025-08-17
Last modified: 2026-06-17

Description

A security flaw has been discovered in Tenda AC20 16.03.08.12. Affected by this vulnerability is an unknown functionality of the file /etc_ro/shadow. The manipulation leads to hard-coded credentials. It is possible to launch the attack on the local host. The complexity of an attack is rather high. The exploitation appears to be difficult. The exploit has been disclosed to the public and may be used.

Frequently asked questions

What is CVE-2025-9091?: A security flaw has been discovered in Tenda AC20 16.03.08.12. Affected by this vulnerability is an unknown functionality of the file /etc_ro/shadow. The manipulation leads to hard-coded credentials. It is possible to launch the attack on the local host. The complexity of an attack is rather high. The exploitation appears to be difficult. The exploit has been disclosed to the public and may be used.
How severe is CVE-2025-9091?: CVE-2025-9091 has a CVSS 3.x base score of 2.5, rated low severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2025-9091 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-9091?: CVE-2025-9091 affects Tenda Ac20 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-9091?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-9091 have an EU (EUVD) identifier?: Yes. CVE-2025-9091 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-25104.
When was CVE-2025-9091 published?: CVE-2025-9091 was published on 2025-08-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tenda:ac20_firmware:16.03.08.12:*:*:*:*:*:*:*

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