PT-2026-21379 · Tenda · Tenda Ac21

Hhsw34 · Published 2026-02-21 · Updated 2026-02-22 · CVE-2026-2870

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 security flaw exists in Tenda A21 version 1.0.0.0. The issue is a stack-based buffer overflow in the set qosMib list function located in the file /goform/formSetQosBand. The vulnerability is triggered by manipulating the list argument and can be exploited remotely. A public exploit is available.

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

Exploit

Buffer Overflow

Stack Overflow

Weakness Enumeration

CWE-119

CWE-121

Related Identifiers

CVE-2026-2870

Affected Products

Tenda Ac21

References · 11

• 🔥 https://github.com/QIU-DIE/cve-nneeww/issues/1 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-2870 · Security Note
• https://osv.dev/vulnerability/CVE-2026-2870 · Vendor Advisory
• https://vuldb.com/?submit.754627 · Note
• https://t.me/CVEtracker/45384 · Telegram Post
• https://vuldb.com/?ctiid.347107 · Note
• https://twitter.com/CveFindCom/status/2025226710107459752 · Twitter Post
• https://t.me/cveNotify/152725 · Telegram Post
• https://tenda.com.cn · Note
• https://vuldb.com/?id.347107 · Note
• https://twitter.com/CVEnew/status/2025425465343967359 · Twitter Post