CVE-2025-9791
criticalA weakness has been identified in Tenda AC20 16.03.08.05.
Vendor / product: Tenda — ac20 firmware
A weakness has been identified in Tenda AC20 16.03.08.05. This vulnerability affects unknown code of the file /goform/fromAdvSetMacMtuWan. This manipulation of the argument wanMTU causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been made available to the public and could be exploited.
CVSS
9.8
9.8 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2025-09-01 19:15
Modified: 2026-09-26 00:10
NVD status: Analyzed
Last synced 2 days ago
Verified against the source API 2026-10-27 07:06 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
tenda / ac20_firmware 16.03.08.5
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/Cpppq43/Tenda/blob/main/Tenda_AC20_V16.03.08.05.md cna@vuldb.com
- https://github.com/Cpppq43/Tenda/blob/main/Tenda_AC20_V16.03.08.05.md#poc cna@vuldb.com
- https://vuldb.com/?ctiid.322106 cna@vuldb.com
- https://vuldb.com/?id.322106 cna@vuldb.com
- https://vuldb.com/?submit.641088 cna@vuldb.com
- https://www.tenda.com.cn/ cna@vuldb.com
- https://github.com/Cpppq43/Tenda/blob/main/Tenda_AC20_V16.03.08.05.md 134c704f-9b21-4f2e-91b3-4a467353bcc0
- https://github.com/Cpppq43/Tenda/blob/main/Tenda_AC20_V16.03.08.05.md#poc 134c704f-9b21-4f2e-91b3-4a467353bcc0
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 07:06 UTC · record ↗