How severe is CVE-2025-10838?

CVE-2025-10838 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-2025-10838 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-10838?

CVE-2025-10838 affects Tenda Ac21 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-10838?

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-2025-10838 have an EU (EUVD) identifier?

Yes. CVE-2025-10838 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-30827.

When was CVE-2025-10838 published?

CVE-2025-10838 was published on 2025-09-23 and last updated on 2026-06-17.

CVE-2025-10838

CVE-2025-10838 is a high-severity vulnerability in Tenda Ac21 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-119.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
CVSS v4: 7.4
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-30827
Weakness: CWE-119
Affected product: Tenda Ac21 Firmware
Published: 2025-09-23
Last modified: 2026-06-17

Description

A vulnerability was identified in Tenda AC21 16.03.08.16. The affected element is the function sub_45BB10 of the file /goform/WifiExtraSet. The manipulation of the argument wpapsk_crypto leads to buffer overflow. It is possible to initiate the attack remotely. The exploit is publicly available and might be used.

Frequently asked questions

What is CVE-2025-10838?: A vulnerability was identified in Tenda AC21 16.03.08.16. The affected element is the function sub_45BB10 of the file /goform/WifiExtraSet. The manipulation of the argument wpapsk_crypto leads to buffer overflow. It is possible to initiate the attack remotely. The exploit is publicly available and might be used.
How severe is CVE-2025-10838?: CVE-2025-10838 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-2025-10838 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-10838?: CVE-2025-10838 affects Tenda Ac21 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-10838?: 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-2025-10838 have an EU (EUVD) identifier?: Yes. CVE-2025-10838 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-30827.
When was CVE-2025-10838 published?: CVE-2025-10838 was published on 2025-09-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tenda:ac21_firmware:*:*:*:*:*:*:*:*

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