CVE-2025-9605

Tenda Ac21 Firmware buffer overflow

9.8 CRITICALPublic exploitEPSS 5.57%

Published29 Aug 2025

Description

A security vulnerability has been detected in Tenda AC21 and AC23 16.03.08.16. Affected is the function GetParentControlInfo of the file /goform/GetParentControlInfo. Such manipulation of the argument mac leads to stack-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed publicly and may be used.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Tenda Ac21 Firmware16.03.08.16

Tenda Ac23 Firmware16.03.08.16

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

https://github.com/XXRicardo/iot-cve/blob/main/Tenda/AC21/AC21V1.0re_V16.03.08.16.mdExploitThird Party Advisory
https://github.com/XXRicardo/iot-cve/blob/main/Tenda/AC23/Stack-Based%20Buffer%20Overflow%20in%20Tenda%20Wi-Fi%205%20Router%20AC23%EF%BC%88AC23V1.0re_V16.03.07.52%EF%BC%89.mdExploitThird Party Advisory
https://vuldb.com/?ctiid.321783Permissions RequiredVDB Entry
https://vuldb.com/?id.321783Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.636545Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.636548Third Party AdvisoryVDB Entry
https://www.tenda.com.cn/Product

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2025-9605 being actively exploited?

CVE-2025-9605 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 5.57%.

How severe is CVE-2025-9605?

CVE-2025-9605 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 5.57% probability of exploitation.

Which products are affected by CVE-2025-9605?

Affected products include Tenda Ac21 Firmware, Tenda Ac23 Firmware.

How do I fix CVE-2025-9605?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-9605 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.