PT-2025-39754 · Tenda · Tenda Ac21

Maximdevere · Published 2025-09-27 · Updated 2025-10-14 · CVE-2025-11091

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 versions up to 16.03.08.16

Description A security issue exists in Tenda AC21 routers. A buffer overflow can be triggered remotely through manipulation of the argument list within the sscanf function located in the /goform/SetStaticRouteCfg file. The exploit for this issue has been publicly released. Admin access may simplify exploitation.

Recommendations Update Tenda AC21 to a version later than 16.03.08.16.

Exploit

Fix

Buffer Overflow

Weakness Enumeration

CWE-119

CWE-120

Related Identifiers

BDU:2025-12455

CVE-2025-11091

Affected Products

Tenda Ac21

References · 14

• 🔥 https://github.com/maximdevere/CVE2/issues/2 · Exploit
• https://osv.dev/vulnerability/CVE-2025-11091 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-11091 · Security Note
• https://bdu.fstec.ru/vul/2025-12455 · Security Note
• https://twitter.com/ZeroPathLabs/status/1972130267641819154 · Twitter Post
• https://t.me/CVEtracker/33566 · Telegram Post
• https://t.me/cveNotify/136724 · Telegram Post
• https://twitter.com/CveFindCom/status/1972121499151573036 · Twitter Post
• https://vuldb.com/?submit.661806 · Note
• https://vuldb.com/?id.326173 · Note
• https://tenda.com.cn · Note
• https://twitter.com/VulmonFeeds/status/1972129254407065712 · Twitter Post
• https://twitter.com/cracbot/status/1974066941540082152 · Twitter Post
• https://vuldb.com/?ctiid.326173 · Note