Cyber Resilience

CVE-2022-40942

CriticalPublic PoC

Published: 28 September 2022

Published
28 September 2022
Modified
21 May 2025
KEV Added
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Patch
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CVSS Score v3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0063 70.8th percentile
Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2022-40942 is a critical-severity Out-of-bounds Write (CWE-787) vulnerability in Tenda Tx3 Firmware. Its CVSS base score is 9.8 (Critical).

Operationally, ranked in the top 29.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

Tenda TX3 US_TX3V1.0br_V16.03.13.11 is vulnerable to stack overflow via compare_parentcontrol_time.

CWE(s)
CWE-787

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

tenda
tx3 firmware
16.03.13.11

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-16 Memory Protection
addresses: CWE-787

Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.

References