CVE-2026-4903

HIGH

Tenda AC5 POST Request QuickIndex formQuickIndex memory corruption

Title source: cna

Description

A flaw has been found in Tenda AC5 15.03.06.47. This vulnerability affects the function formQuickIndex of the file /goform/QuickIndex of the component POST Request Handler. This manipulation of the argument PPPOEPassword causes stack-based buffer overflow. The attack may be initiated remotely. The exploit has been published and may be used.

References (5)

[Vdb Entry, Technical Description] https://vuldb.com/?id.353654

[Signature, Permissions Required] https://vuldb.com/?ctiid.353654

[Third Party Advisory] https://vuldb.com/?submit.777380

[Exploit] https://lavender-bicycle-a5a.notion.site/Tenda_AC5_QuickIndex_PPPOEPassword-32053a41781f808dae98f99c99bcb21c?source=copy_link

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

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/AC5 15.03.06.47

tenda/ac5_firmware 15.03.06.47

Published Mar 26, 2026

Tracked Since Mar 27, 2026