PT-2026-21380 · Tenda · Tenda Ac21

Hhsw34 · Published 2026-02-21 · Updated 2026-02-22 · CVE-2026-2871

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 fromSetIpMacBind function within the /goform/SetIpMacBind API endpoint of the Tenda A21 router. Manipulation of the argument list to this function can trigger the overflow, allowing for remote code execution or a denial-of-service condition. The exploit for this issue has been publicly released.

Recommendations Versions prior to 1.0.0.0 are recommended. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

DoS

Stack Overflow

Buffer Overflow

Weakness Enumeration

CWE-121

CWE-119

Related Identifiers

CVE-2026-2871

Affected Products

Tenda Ac21

References · 13

• 🔥 https://github.com/QIU-DIE/cve-nneeww/issues/2 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-2871 · Security Note
• https://osv.dev/vulnerability/CVE-2026-2871 · Vendor Advisory
• https://t.me/CVEtracker/45385 · Telegram Post
• https://vuldb.com/?ctiid.347108 · Note
• https://twitter.com/CveFindCom/status/2025234223813083519 · Twitter Post
• https://twitter.com/CveTodo/status/2025246193211576364 · Twitter Post
• https://vuldb.com/?id.347108 · Note
• https://vuldb.com/?submit.754630 · Note
• https://tenda.com.cn · Note
• https://vuldb.com/?submit.754631 · Note
• https://twitter.com/CVEnew/status/2025425464429556006 · Twitter Post
• https://t.me/cveNotify/152726 · Telegram Post