Vulnerability Report

CVE-2026-4961

Title: Tenda AC6 Stack-based Buffer Overflow via PPPOEPassword

Memory Corruption

Proof Of Concept

No public PoC currently indexed for CVE-2026-4961.

CWE Category CWE-119

Published Date Mar 27, 2026

Modified Date Mar 31, 2026

Exploit Status Not Found

Score 7.4 CVSS v4.0

Exploit Probability (EPSS)

0.04%

Vulnerability Summary

CVE-2026-4961: 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.

Impacted Vendors

tenda 1

tendacn 1

Reference Links

https://lavender-bicycle-a5a.notion.site/Tenda-AC6-QuickIndex-32053a41781f80758e27fa4259ec80cf?source=copy_link https://vuldb.com/?ctiid.353838 https://vuldb.com/?id.353838 https://vuldb.com/?submit.777617 https://www.tenda.com.cn/

CVSS v4.0

Source Entity [email protected]

Severity HIGH

7.4

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

N/A

RAW VECTOR

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

Source Entity [email protected]

Severity HIGH

8.8

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

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

CVSS v2.0

Source Entity [email protected]

Severity HIGH

9.0

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:N/AC:L/Au:S/C:C/I:C/A:C

Associated Attack Patterns (CAPEC)

Total: Patterns