Is CVE-2022-40868 actively exploited?

No active exploitation of CVE-2022-40868 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2022-40868 be exploited remotely?

Yes. CVE-2022-40868 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2022-40868?

CVE-2022-40868 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2022-40868

CWE-787Published: September 23, 2022· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Tenda W20E router V15.11.0.6 (US_W20EV4.0br_V15.11.0.6(1068_1546_841)_CN_TDC) contains a stack overflow vulnerability in the function formDelDhcpRule with the request /goform/delDhcpRules/

NVD Source

Risk Analysis

The Tenda W20E router contains a stack overflow vulnerability in its DHCP rule deletion function, which could lead to remote code execution. The 9.8 CVSS score indicates an urgent need for remediation due to the potential for total device compromise.

There is no known public exploit, and the vulnerability is not in the KEV catalog. It is remotely exploitable with low complexity.

Recommended Action

Update the Tenda W20E firmware to a version that patches the stack overflow in the formDelDhcpRule function. Restrict access to the router's web management interface.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2022-40868 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.