ZyXEL NBG-418N v2 1.00(AARP.13)C0 Telnet Service buffer overflow

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability was found in ZyXEL NBG-418N v2. It has been declared as critical. Affected by this issue is some unknown functionality of the component Telnet Service. Executing a manipulation can lead to buffer overflow. This vulnerability is registered as CVE-2023-22922. It is possible to launch the attack remotely. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in ZyXEL NBG-418N v2 (Router Operating System). This vulnerability affects some unknown processing of the component Telnet Service. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. 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. As an impact it is known to affect availability. CVE summarizes:

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.

The weakness was published 05/02/2023. The advisory is shared for download at zyxel.com. This vulnerability was named CVE-2023-22922 since 01/10/2023. There are neither technical details nor an exploit publicly available.

Upgrading to version 1.00(AARP.14)C0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-27024). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (Zyxel Corporation): 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: NBG-418N v2 1.00(AARP.14)C0

Timelineinfo

01/10/2023 🔍
05/02/2023 +111 days 🔍
05/02/2023 +0 days 🔍
10/05/2025 +887 days 🔍

Sourcesinfo

Vendor: zyxel.com

Advisory: zyxel.com
Status: Confirmed

CVE: CVE-2023-22922 (🔍)
GCVE (CVE): GCVE-0-2023-22922
GCVE (VulDB): GCVE-100-227800
EUVD: 🔍

Entryinfo

Created: 05/02/2023 06:53
Updated: 10/05/2025 13:13
Changes: 05/02/2023 06:53 (50), 10/05/2025 13:13 (17)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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