CVE-2025-9087

Tenda Ac20 Firmware buffer overflow

8.8 HIGHPublic exploitEPSS 1.13%

Published16 Aug 2025

Description

A vulnerability has been found in Tenda AC20 16.03.08.12. This affects the function set_qosMib_list of the file /goform/SetNetControlList of the component SetNetControlList Endpoint. The manipulation of the argument list leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredLow

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected products

Tenda Ac20 Firmware16.03.08.12

Remediation

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

References

https://github.com/ZZ2266/.github.io/tree/main/AC20/formSetQosBandExploitThird Party Advisory
https://github.com/ZZ2266/.github.io/tree/main/AC20/formSetQosBand#poc-python-exploit-scriptExploitThird Party Advisory
https://vuldb.com/?ctiid.320355Permissions RequiredVDB Entry
https://vuldb.com/?id.320355Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.632037Third Party AdvisoryVDB Entry
https://www.tenda.com.cn/Product

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2025-9087 being actively exploited?

CVE-2025-9087 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 1.13%.

How severe is CVE-2025-9087?

CVE-2025-9087 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 1.13% probability of exploitation.

Which products are affected by CVE-2025-9087?

Affected products include Tenda Ac20 Firmware.

How do I fix CVE-2025-9087?

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-2025-9087 against the real software inventory on every managed device, every day. 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.