CVE-2022-40855
CVSS v3
9.8
CRITICAL
EPSS Score
13.8 %
exploit probability, as of 2026-10-05
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
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.
Technical details
- Published
- 2022-09-23
Frequently asked questions
What is CVE-2022-40855?
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.
Is CVE-2022-40855 actively exploited?
Active exploitation of CVE-2022-40855 has not been confirmed. Its EPSS score was 13.8% on 2026-10-05, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2022-40855?
CVE-2022-40855 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2022-40855 affecting your environment?
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