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Description

A weakness has been identified in Tenda AC8 up to 16.03.50.11. This vulnerability affects the function doSystemCmd of the file /goform/SysToolChangePwd of the component HTTP Endpoint. This manipulation of the argument local_2c causes stack-based buffer overflow. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks.

PUBLISHED Reserved 2026-03-16 | Published 2026-03-16 | Updated 2026-03-16 | Assigner VulDB




CRITICAL: 9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
CRITICAL: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
CRITICAL: 9.8CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
10.0AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR

Problem types

Stack-based Buffer Overflow

Memory Corruption

Product status

16.03.50.0
affected

16.03.50.1
affected

16.03.50.2
affected

16.03.50.3
affected

16.03.50.4
affected

16.03.50.5
affected

16.03.50.6
affected

16.03.50.7
affected

16.03.50.8
affected

16.03.50.9
affected

16.03.50.10
affected

16.03.50.11
affected

Timeline

2026-03-16:Advisory disclosed
2026-03-16:VulDB entry created
2026-03-16:VulDB entry last update

Credits

DigitalAndrew (VulDB User) reporter

References

vuldb.com/?id.351212 (VDB-351212 | Tenda AC8 HTTP Endpoint SysToolChangePwd doSystemCmd stack-based overflow) vdb-entry technical-description

vuldb.com/?ctiid.351212 (VDB-351212 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/?submit.771773 (Submit #771773 | Tenda AC8 V5 V16.03.50.11 Buffer Overflow) third-party-advisory

github.com/...n/CVE_Report_Tenda_AC8_SysToolChangePwd_BOF.md exploit

www.tenda.com.cn/ product

cve.org (CVE-2026-4254)

nvd.nist.gov (CVE-2026-4254)

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