PT-2026-21389 · Tenda · Tenda Ac18

Junqi · Published 2026-02-21 · Updated 2026-02-22 · CVE-2026-2876

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 A18 version 15.13.07.13

Description A flaw exists in the Tenda A18 device that could allow for remote manipulation. Specifically, the parse macfilter rule function within the /goform/setBlackRule file is susceptible to a stack-based buffer overflow when the deviceList argument is improperly handled. This issue has been publicly disclosed.

Recommendations Update to a newer version that contains a fix for this vulnerability. As a temporary workaround, consider restricting access to the parse macfilter rule function until a patch is available.

Exploit

Fix

Stack Overflow

Buffer Overflow

Weakness Enumeration

CWE-121

CWE-119

Related Identifiers

CVE-2026-2876

Affected Products

Tenda Ac18

References · 12

• 🔥 https://github.com/master-abc/cve/issues/38 · Exploit
• https://osv.dev/vulnerability/CVE-2026-2876 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-2876 · Security Note
• https://twitter.com/CVEnew/status/2025425460730232895 · Twitter Post
• https://vuldb.com/?ctiid.347114 · Note
• https://t.me/cveNotify/152730 · Telegram Post
• https://tenda.com.cn · Note
• https://twitter.com/CveTodo/status/2025276879670841831 · Twitter Post
• https://vuldb.com/?submit.754675 · Note
• https://t.me/CVEtracker/45389 · Telegram Post
• https://twitter.com/CveFindCom/status/2025264423787475234 · Twitter Post
• https://vuldb.com/?id.347114 · Note