What is the CVSS score of CVE-2023-22922?

CVE-2023-22922 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.9%.

Is there a patch available for CVE-2023-22922?

Yes, a patch is available for CVE-2023-22922. Update the affected software to the latest version immediately.

Nbg 418N Firmware CVE-2023-22922

HIGH

Classic Buffer Overflow (CWE-120)

2023-05-01 security@zyxel.com.tw

Buffer Overflow Zyxel Nbg 418N Firmware

7.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

CVE Published

May 01, 2023 - 17:15 nvd

HIGH 7.5

DescriptionNVD

AnalysisAI

A buffer overflow vulnerability in the Zyxel NBG-418N v2 firmware versions prior to V1.00(AARP.14)C0 could allow a remote unauthenticated attacker to cause DoS conditions by sending crafted packets. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Buffer Copy without Size Check vulnerability could allow attackers to overflow a buffer to corrupt adjacent memory.

Technical ContextAI

This vulnerability is classified as Buffer Copy without Size Check (CWE-120), which allows attackers to overflow a buffer to corrupt adjacent memory. A buffer overflow vulnerability in the Zyxel NBG-418N v2 firmware versions prior to V1.00(AARP.14)C0 could allow a remote unauthenticated attacker to cause DoS conditions by sending crafted packets if Telnet is enabled on a vulnerable device. Affected products include: Zyxel Nbg-418N Firmware.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Always validate buffer sizes before copy operations. Use bounded functions (strncpy, snprintf). Enable compiler protections.