Is CVE-2022-40855 in the CISA KEV catalog?

No. CVE-2022-40855 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-40855?

CVE-2022-40855 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2022-40855?

CVE-2022-40855 has an EPSS score of 13.49% (96th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2022-40855

CRITICALEPSS 96th pctl

9.8

CVSS v3

NVD

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.

CWE-787Out-of-bounds Write

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

13.49%probability of exploitation in 30 days

96thpercentile

Very high risk: more likely to be exploited than 96% of all known CVEs.

References

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

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-05-22.