PT-2025-33124 · Tenda · Tenda Ac20

Qmssdxn · CVE-2025-8940 · Published 2025-08-11 · Updated 2025-08-19

Positive Technologies (AI Summary)

CVSS v2.0

9.0

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: Tenda AC20 versions prior to 16.03.08.13

Description: A vulnerability exists in Tenda AC20 routers due to a buffer overflow in the strcpy function within the /goform/saveParentControlInfo file. Manipulation of the Time argument leads to the overflow, and the attack can be launched remotely. The exploit for this issue has been publicly disclosed.

Recommendations: Update Tenda AC20 to version 16.03.08.13 or later.

Exploit

Fix

Buffer Overflow

Weakness Enumeration

CWE-119

CWE-120

Related Identifiers

BDU:2025-10974

CVE-2025-8940

Affected Products

Tenda Ac20

References · 17

• 🔥 https://github.com/lin-3-start/lin-cve/blob/main/Tenda%20AC20-2/Tenda%20AC20-2.md#poc · Exploit
• 🔥 https://github.com/lin-3-start/lin-cve/blob/main/Tenda%20AC20-2/Tenda%20AC20-2.md · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2025-8940 · Security Note
• https://cve.org/CVERecord?id=CVE-2025-8940 · Security Note
• https://osv.dev/vulnerability/CVE-2025-8940 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-10974 · Security Note
• https://vuldb.com/?submit.631836 · Note
• https://vuldb.com/?ctiid.319903 · Note
• https://tenda.com.cn · Note
• https://twitter.com/CVEnew/status/1955900280203341868 · Twitter Post
• https://t.me/cveNotify/132208 · Telegram Post
• https://twitter.com/VulmonFeeds/status/1955905458377527396 · Twitter Post
• https://t.me/cveNotify/132825 · Telegram Post
• https://t.me/purp_sec/1034 · Telegram Post
• https://t.me/CVEtracker/29970 · Telegram Post