PT-2026-27014 · Tenda · Tenda Ac21

Junqi · Published 2026-03-08 · Updated 2026-03-24 · CVE-2026-4565

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 AC21 version 16.03.08.16

Description A buffer overflow issue exists in the formSetQosBand function of the /goform/SetNetControlList file. Manipulation of arguments to this function can trigger the overflow, allowing for remote exploitation. 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

Buffer Overflow

Weakness Enumeration

CWE-120

CWE-119

Related Identifiers

BDU:2026-04251

CVE-2026-4565

Affected Products

Tenda Ac21

References · 14

• 🔥 https://github.com/hellonestor/killallbug/releases/tag/poc · Exploit
• 🔥 https://github.com/hellonestor/killallbug/issues/14 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-4565 · Security Note
• https://bdu.fstec.ru/vul/2026-04251 · Security Note
• https://vuldb.com/?submit.775119 · Note
• https://twitter.com/CVEnew/status/2035992490398871673 · Twitter Post
• https://vuldb.com/?id.352402 · Note
• https://vuldb.com/?ctiid.352402 · Note
• https://twitter.com/VulmonFeeds/status/2035891505861132626 · Twitter Post
• https://twitter.com/cyberbivash/status/2035923040450593176 · Twitter Post
• https://twitter.com/vuldb/status/2035637155259912656 · Twitter Post
• https://twitter.com/CveFindCom/status/2035894970406654275 · Twitter Post
• https://tenda.com.cn · Note
• https://twitter.com/CVEarity/status/2036460382240620951 · Twitter Post