What is CVE-2022-40942?

CVE-2022-40942 is a critical-severity vulnerability in Tenda Tx3, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2022-09-28.

How severe is CVE-2022-40942?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2022-40942 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Tenda Tx3

CVE-2022-40942

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

Vulnerability class: Buffer Overflow

Published 2022-09-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.083 (94.8th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.081 · newest: 0.083 · change: +0.002

Affected products

Tenda Tx3
Tenda Tx3 Firmware — versions 16.03.13.11

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

github.com/Rumble0x0/vulnerability/blob/main/tenda/TX3/stack overflow via compa… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2022-40942?: CVE-2022-40942 is a critical-severity vulnerability in Tenda Tx3, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2022-09-28.
How severe is CVE-2022-40942?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2022-40942 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.