CVE-2026-4254 is a critical stack-based buffer overflow vulnerability affecting Tenda AC8 firmware up to version 16.03.50.11. This flaw resides in the doSystemCmd function of the /goform/SysToolChangePwd HTTP endpoint, allowing manipulation of an argument to trigger the overflow. With a CVSS score of 9.8 (CRITICAL), it presents a severe risk as it can be exploited remotely with low attack complexity, potentially leading to complete compromise of the device. Although exploit code has been made publicly available, there is currently no indication of active exploitation, inclusion in the KEV catalog, or significant community discussion surrounding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 16.03.50.11CPE matchmatch criteria | cpe:2.3:o:tenda:ac8_firmware:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
CVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.