PT-2026-21388 · Tenda · Tenda Ac21

Hhsw34 · Published 2026-02-21 · Updated 2026-02-22 · CVE-2026-2874

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 A21 version 1.0.0.0

Description A stack-based buffer overflow exists in the form fast setting wifi set function located in the /goform/fast setting wifi set file. Manipulation of the ssid argument can trigger the overflow, allowing for remote attacks. The exploit has been published.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Stack Overflow

Buffer Overflow

Weakness Enumeration

CWE-121

CWE-119

Related Identifiers

CVE-2026-2874

Affected Products

Tenda Ac21

References · 12

• 🔥 https://github.com/QIU-DIE/cve-nneeww/issues/5 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-2874 · Security Note
• https://osv.dev/vulnerability/CVE-2026-2874 · Vendor Advisory
• https://twitter.com/CVEnew/status/2025425461682339963 · Twitter Post
• https://twitter.com/CveFindCom/status/2025279519163044202 · Twitter Post
• https://vuldb.com/?ctiid.347111 · Note
• https://t.me/cveNotify/152729 · Telegram Post
• https://vuldb.com/?submit.754636 · Note
• https://t.me/CVEtracker/45388 · Telegram Post
• https://tenda.com.cn · Note
• https://vuldb.com/?id.347111 · Note
• https://twitter.com/VulmonFeeds/status/2025283059474428267 · Twitter Post