PT-2026-25746 · Tenda · Ac8+1

Digitalandrew · Published 2026-03-16 · Updated 2026-03-17 · CVE-2026-4254

Positive Technologies (AI Summary)

CVSS v3.1

10

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Tenda AC8 versions through 16.03.50.11

Description A weakness exists in the Tenda AC8. This issue affects the doSystemCmd function within the /goform/SysToolChangePwd file of the HTTP Endpoint component. Manipulation of the local 2c argument leads to a stack-based buffer overflow. The attack can be initiated remotely. A public exploit is available.

Recommendations Versions through 16.03.50.11 should be updated to a newer, fixed version when available. As a temporary workaround, consider restricting access to the /goform/SysToolChangePwd file or disabling the doSystemCmd function until a patch is available.

Exploit

Fix

DoS

Stack Overflow

Memory Corruption

Buffer Overflow

Weakness Enumeration

CWE-121

CWE-787

CWE-119

Related Identifiers

CVE-2026-4254

Affected Products

Ac8

Ac8 Firmware

References · 11

• 🔥 https://github.com/digitalandrew/tenda_ac8_v5/blob/main/CVE_Report_Tenda_AC8_SysToolChangePwd_BOF.md · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-4254 · Security Note
• https://vuldb.com/?ctiid.351212 · Note
• https://vuldb.com/?id.351212 · Note
• https://tenda.com.cn · Note
• https://vuldb.com/?submit.771773 · Note
• https://twitter.com/vuldb/status/2033510646210552115 · Twitter Post
• https://twitter.com/CVEnew/status/2033755339405902244 · Twitter Post
• https://twitter.com/CveFindCom/status/2033615038263529500 · Twitter Post
• https://twitter.com/0dayPublishing/status/2033602737858892203 · Twitter Post
• https://twitter.com/cyberbivash/status/2033643117794988080 · Twitter Post