CVE-2026-24110: tenda w20e_firmware Classic Buffer Overflow
Vulnerability summary
CVE-2026-24110 is a critical (CVSS 9.8) Classic Buffer Overflow vulnerability in tenda w20e_firmware. EPSS estimates a 0.44% chance of exploitation in the next 30 days, higher than 37.3% of scored vulnerabilities. 1 public exploit is recorded.
Timeline
- 02-03-2026PublishedVulnerability first disclosed.
- 02-03-2026Last modifiedVulnerability information updated.
Description
An issue was discovered in Tenda W20E V4.0br_V15.11.0.6. Attackers may send overly long `addDhcpRules` data. When these rules enter the `addDhcpRule` function and are processed by `ret = sscanf(pRule, " %d\t%[^\t]\t%[^\n\r\t]", &dhcpsIndex, dhcpsIP, dhcpsMac);`, the lack of size validation for the rules could lead to buffer overflows in `dhcpsIndex`, `dhcpsIP`, and `dhcpsMac`.
CVSS metrics
2 scores · 2 sources · 1 version- NVDNIST9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.44%
Chance of exploitation in the next 30 days
Percentile
37%
Versus all other CVEs
30-day change
Increase +0.02 pp
From 0.43% on 22-09-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundCvereport
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Tenda1 product
- w20e_firmware15.11.0.6
1 vendor · 1 product