How severe is CVE-2025-57638?

CVE-2025-57638 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-57638 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-57638?

CVE-2025-57638 affects Tenda Ac9 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-57638?

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-2025-57638 have an EU (EUVD) identifier?

Yes. CVE-2025-57638 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-30928.

When was CVE-2025-57638 published?

CVE-2025-57638 was published on 2025-09-23 and last updated on 2026-06-17.

CVE-2025-57638

CVE-2025-57638 is a high-severity vulnerability in Tenda Ac9 Firmware with a CVSS 3.x base score of 7.5. 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-122.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-30928
Weakness: CWE-122
Affected product: Tenda Ac9 Firmware
Published: 2025-09-23
Last modified: 2026-06-17

Description

Buffer overflow vulnerability in Tenda AC9 1.0 via the user supplied sys.vendor configuration value.

Frequently asked questions

What is CVE-2025-57638?: Buffer overflow vulnerability in Tenda AC9 1.0 via the user supplied sys.vendor configuration value.
How severe is CVE-2025-57638?: CVE-2025-57638 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-57638 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-57638?: CVE-2025-57638 affects Tenda Ac9 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-57638?: 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-2025-57638 have an EU (EUVD) identifier?: Yes. CVE-2025-57638 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-30928.
When was CVE-2025-57638 published?: CVE-2025-57638 was published on 2025-09-23 and last updated on 2026-06-17.

References

https://github.com/glkfc/IoT-Vulnerability/blob/main/Tenda/tenda1.md

Affected products (1)

cpe:2.3:o:tenda:ac9_firmware:1.0:*:*:*:*:*:*:*

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