What is CVE-2022-43391?

CVE-2022-43391 is a medium-severity vulnerability in Zyxel Ax7501-b0, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.5/10. Published 2023-01-11.

How severe is CVE-2022-43391?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2022-43391 known to be exploited?

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

Buffer overflow in Zyxel Ax7501-b0

CVE-2022-43391

A buffer overflow vulnerability in the parameter of the CGI program in Zyxel NR7101 firmware prior to V1.15(ACCC.3)C0, which could allow an authenticated attacker to cause denial-of-service (DoS) conditions by sending a crafted HTTP reques…

Vulnerability class: Buffer Overflow

EPSS: 0.007 (49.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/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-2022-43391?: CVE-2022-43391 is a medium-severity vulnerability in Zyxel Ax7501-b0, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.5/10. Published 2023-01-11.
How severe is CVE-2022-43391?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2022-43391 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.