by Kastro
Paper/Archive/CVE-2026-4254

CVE-2026-4254

Tenda AC8 — Tenda AC8 HTTP Endpoint SysToolChangePwd doSystemCmd stack-based overflow

EPSS 0.9%public exploitCVSS 9.8
critical.is priorityof 100
51
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 59.8.598 × 2012.0Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
AC816.03.50.0–CNA
AC816.03.50.1–CNA
AC816.03.50.2–CNA
AC816.03.50.3–CNA
AC816.03.50.4–CNA
AC816.03.50.5–CNA
AC816.03.50.6–CNA
AC816.03.50.7–CNA
AC816.03.50.8–CNA
AC816.03.50.9–CNA
AC816.03.50.10–CNA
AC816.03.50.11–CNA

Scores by source

VulDB (CNA)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
VulDB (CNA)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
VulDB (CNA)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
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

writeupvuldb.com/?id.351212refvuldb.com/?ctiid.351212writeupvuldb.com/?submit.771773exploitgithub.com/digitalandrew/tenda_ac8_v5/blob/main/CVE_Report_Tenda_AC8_SysToolChangePwd_BOF.mdreftenda.com.cn