PT-2026-25772 · Tenda · Tenda Ac8

Digitalandrew · Published 2026-03-04 · Updated 2026-03-16 · CVE-2026-4252

Positive Technologies (AI Summary)

CVSS v3.1

10

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Tenda AC8 version 16.03.50.11

Description A flaw exists in the IPv6 Handler component of the software, specifically within the check is ipv6 function. This issue allows for authentication bypass by relying on IP address manipulation. The attack can be initiated remotely. It is estimated that over 50 million Tenda routers are potentially affected. A public proof-of-concept (PoC) exploit is available. The vulnerability involves IPv6 spoofing.

Recommendations Update to a newer version that contains a fix for this vulnerability. As a temporary workaround, consider disabling the IPv6 Handler component until a patch is available.

Exploit

Fix

Improper Authentication

Weakness Enumeration

CWE-291

CWE-287

Related Identifiers

BDU:2026-03418

CVE-2026-4252

Affected Products

Tenda Ac8

References · 9

• 🔥 https://github.com/digitalandrew/tenda_ac8_v5/blob/main/poc_ipv6_auth_bypass.py · Exploit
• 🔥 https://vuldb.com/?submit.771759 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-4252 · Security Note
• https://bdu.fstec.ru/vul/2026-03418 · Security Note
• https://vuldb.com/?id.351210 · Note
• https://twitter.com/CveFindCom/status/2033599892266930396 · Twitter Post
• https://vuldb.com/?ctiid.351210 · Note
• https://tenda.com.cn · Note
• https://twitter.com/0dayPublishing/status/2033587625878077727 · Twitter Post