CVE-2026-2873 is a high-severity stack-based buffer overflow vulnerability affecting Tenda A21 1.0.0.0 firmware. Specifically, manipulating the schedStartTime or schedEndTime arguments within the setSchedWifi function of /goform/openSchedWifi can trigger the overflow. This vulnerability carries a CVSS score of 8.8, indicating a critical risk due to its remote attack vector, low attack complexity, and high potential for confidentiality, integrity, and availability impacts. While public exploit code is available, there is currently no evidence of active exploitation, and it has received minimal community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
1.0.0.0CPE matchmatch criteria | cpe:2.3:o:tenda:a21_firmware:1.0.0.0:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.