CVE-2026-4961

HIGH

Tenda AC6 POST Request QuickIndex formQuickIndex stack-based overflow

Title source: cna

Description

A vulnerability was identified in Tenda AC6 15.03.05.16. Affected by this vulnerability is the function formQuickIndex of the file /goform/QuickIndex of the component POST Request Handler. The manipulation of the argument PPPOEPassword leads to stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit is publicly available and might be used.

References (5)

[Product] https://www.tenda.com.cn/

[Vdb Entry, Technical Description] https://vuldb.com/?id.353838

[Signature, Permissions Required] https://vuldb.com/?ctiid.353838

[Third Party Advisory] https://vuldb.com/?submit.777617

[Exploit] https://lavender-bicycle-a5a.notion.site/Tenda-AC6-QuickIndex-32053a41781f80758e27fa4259ec80cf?source=copy_link

Scores

CVSS v3 8.8

EPSS 0.0009

EPSS Percentile 25.6%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation poc

Automatable no

Technical Impact total

Details

CWE

CWE-119 CWE-121 CWE-787

Status published

Products (2)

Tenda/AC6 15.03.05.16

tenda/ac6_firmware 15.03.05.16

Published Mar 27, 2026

Tracked Since Mar 29, 2026