CVE-2023-37926 : A buffer overflow vulnerability in the Zyxel ATP series firmware versions 4.32 t

A buffer overflow vulnerability in the Zyxel ATP series firmware versions 4.32 through 5.37, USG FLEX series firmware versions 4.50 through 5.37, USG FLEX 50(W) series firmware versions 4.16 through 5.37, USG20(W)-VPN series firmware versions 4.16 through 5.37, and VPN series firmware versions 4.30 through 5.37, could allow an authenticated local attacker to cause denial-of-service (DoS) conditions by executing the CLI command to dump system logs on an affected device.

Published 2023-11-28 02:15:43

Updated 2023-12-04 18:08:44

Source Zyxel Corporation

View at NVD, CVE.org

Vulnerability category: OverflowDenial of service

Products affected by CVE-2023-37926

Zyxel » ZLD
Versions from including (>=) 4.50 and up to, including, (<=) 5.37
cpe:2.3:o:zyxel:zld:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Usg Flex 100 » Version: N/A
When used together with: Zyxel » Usg Flex 100w » Version: N/A
When used together with: Zyxel » Usg Flex 200 » Version: N/A
When used together with: Zyxel » Usg Flex 50 » Version: N/A
When used together with: Zyxel » Usg Flex 500 » Version: N/A
When used together with: Zyxel » Usg Flex 50w » Version: N/A
When used together with: Zyxel » Usg Flex 700 » Version: N/A
Zyxel » ZLD
Versions from including (>=) 4.16 and up to, including, (<=) 5.37
cpe:2.3:o:zyxel:zld:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Usg 20w-vpn » Version: N/A
When used together with: Zyxel » Vpn50w » Version: N/A
Zyxel » ZLD
Versions from including (>=) 4.32 and up to, including, (<=) 5.37
cpe:2.3:o:zyxel:zld:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Atp100 » Version: N/A
When used together with: Zyxel » Atp100w » Version: N/A
When used together with: Zyxel » Atp200 » Version: N/A
When used together with: Zyxel » Atp500 » Version: N/A
When used together with: Zyxel » Atp700 » Version: N/A
When used together with: Zyxel » Atp800 » Version: N/A
Zyxel » ZLD
Versions from including (>=) 4.30 and up to, including, (<=) 5.37
cpe:2.3:o:zyxel:zld:*:*:*:*:*:*:*:*
Matching versions
When used together with: Zyxel » Vpn100 » Version: N/A
When used together with: Zyxel » Vpn1000 » Version: N/A
When used together with: Zyxel » Vpn300 » Version: N/A
When used together with: Zyxel » Vpn50 » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2023-37926

EPSS FAQ

0.04%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 8 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2023-37926

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source	First Seen
5.5	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	1.8	3.6	Zyxel Corporation
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2023-37926

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

The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.
Assigned by:
- nvd@nist.gov (Primary)
- security@zyxel.com.tw (Secondary)

References for CVE-2023-37926

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-aps

Zyxel security advisory for multiple vulnerabilities in firewalls and APs | Zyxel Networks
Vendor Advisory

CVEs referencing this url

Jump to

Vulnerability Details : CVE-2023-37926

Products affected by CVE-2023-37926

Exploit prediction scoring system (EPSS) score for CVE-2023-37926

CVSS scores for CVE-2023-37926

CWE ids for CVE-2023-37926

References for CVE-2023-37926