CVE-2022-40855

9.8 criticalEPSS 14%

Critical (9.8) in tenda w20e firmware. EPSS 14% chance of exploitation in the next 30 days.

Tenda W20E router V15.11.0.6 contains a stack overflow in the function formSetPortMapping with post request 'goform/setPortMapping/'. This vulnerability allows attackers to cause a Denial of Service (DoS) or Remote Code Execution (RCE) via the portMappingServer, portMappingProtocol, portMappingWan, porMappingtInternal, and portMappingExternal parameters.

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 14% chance of exploitation in the next 30 days; higher than 96% of CVEs (scores of 2026-10-31)
CWE: CWE-787
Published: 2022-09-23
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

tenda:w20e_firmware

References

https://github.com/CPSeek/Router-vuls/blob/main/Tenda/W20E/formSetPortMapping.md
https://github.com/CPSeek/Router-vuls/blob/main/Tenda/W20E/formSetPortMapping.md

Check your stack JSON