PT-2026-28735 · Tenda · Tenda F453

Ltzhust2 · CVE-2026-5021 · Published 2026-03-27 · Updated 2026-03-29

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 F453 version 1.0.0.3

Description A flaw exists in the Tenda F453 device. The issue is a stack-based buffer overflow within the fromPPTPUserSetting function, located in the /goform/PPTPUserSetting file of the httpd component. Manipulation of the delno argument causes this overflow. Remote exploitation is possible.

Recommendations Update to a newer version that contains a fix for this vulnerability. As a temporary workaround, consider disabling the PPTP service to minimize the risk of exploitation.

Exploit

Fix

Stack Overflow

Memory Corruption

Buffer Overflow

Weakness Enumeration

CWE-121

CWE-787

CWE-119

Related Identifiers

CVE-2026-5021

Affected Products

Tenda F453

References · 11

• 🔥 https://github.com/Litengzheng/vul_db/blob/main/F453/vul_92/README.md · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-5021 · Security Note
• https://twitter.com/CVEarity/status/2038266493167956107 · Twitter Post
• https://twitter.com/cyberbivash/status/2038080436857979152 · Twitter Post
• https://twitter.com/CVEnew/status/2038135153118282018 · Twitter Post
• https://tenda.com.cn · Note
• https://vuldb.com/vuln/353906/cti · Note
• https://twitter.com/vuldb/status/2037539286598418843 · Twitter Post
• https://twitter.com/CveFindCom/status/2038069358090428909 · Twitter Post
• https://vuldb.com/vuln/353906 · Note
• https://vuldb.com/submit/778415 · Note