What is CVE-2022-43389?

CVE-2022-43389 is a high-severity vulnerability in Zyxel Ep240p, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.6/10. Published 2023-01-11.

How severe is CVE-2022-43389?

High severity. CVSS v3 base score is 8.6 out of 10.

Is CVE-2022-43389 known to be exploited?

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

Buffer overflow in Zyxel Ep240p

CVE-2022-43389

A buffer overflow vulnerability in the library of the web server in Zyxel NR7101 firmware prior to V1.15(ACCC.3)C0, which could allow an unauthenticated attacker to execute some OS commands or to cause denial-of-service (DoS) conditions on a vulnerable device.

Vulnerability class: Buffer Overflow

EPSS: 0.006 (45.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H.

Affected products

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

Public proof-of-concept exploits

karimhabush/cyberowl

References

security@zyxel.com.tw (Vendor Advisory)

Frequently asked questions

What is CVE-2022-43389?: CVE-2022-43389 is a high-severity vulnerability in Zyxel Ep240p, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.6/10. Published 2023-01-11.
How severe is CVE-2022-43389?: High severity. CVSS v3 base score is 8.6 out of 10.
Is CVE-2022-43389 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.