PT-2026-21382 · Tenda · Tenda Ac21

Hhsw34 · Published 2026-02-08 · Updated 2026-02-22 · CVE-2026-2873

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 setSchedWifi function of the /goform/openSchedWifi file. Manipulation of the schedStartTime and schedEndTime arguments can trigger this issue. The attack can be initiated remotely. The exploit is publicly available.

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

BDU:2026-02144

CVE-2026-2873

Affected Products

Tenda Ac21

References · 13

• 🔥 https://github.com/QIU-DIE/cve-nneeww/issues/4 · Exploit
• https://bdu.fstec.ru/vul/2026-02144 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-2873 · Security Note
• https://osv.dev/vulnerability/CVE-2026-2873 · Vendor Advisory
• https://vuldb.com/?submit.754635 · Note
• https://tenda.com.cn · Note
• https://twitter.com/VulmonFeeds/status/2025262566876844466 · Twitter Post
• https://t.me/CVEtracker/45387 · Telegram Post
• https://twitter.com/CveFindCom/status/2025256914062320108 · Twitter Post
• https://vuldb.com/?ctiid.347110 · Note
• https://t.me/cveNotify/152728 · Telegram Post
• https://vuldb.com/?id.347110 · Note
• https://twitter.com/CVEnew/status/2025425462638641345 · Twitter Post