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Vulnerability Details :

CVE-2023-22913

Summary
Assigner-Zyxel
Assigner Org ID-96e50032-ad0d-4058-a115-4d2c13821f9f
Published At-24 Apr, 2023 | 00:00
Updated At-12 Feb, 2025 | 16:21
Rejected At-
Credits

A post-authentication command injection vulnerability in the “account_operator.cgi” CGI program of Zyxel USG FLEX series firmware versions 4.50 through 5.35, and VPN series firmware versions 4.30 through 5.35, which could allow a remote authenticated attacker to modify device configuration data, resulting in denial-of-service (DoS) conditions on an affected device.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:Zyxel
Assigner Org ID:96e50032-ad0d-4058-a115-4d2c13821f9f
Published At:24 Apr, 2023 | 00:00
Updated At:12 Feb, 2025 | 16:21
Rejected At:
▼CVE Numbering Authority (CNA)

A post-authentication command injection vulnerability in the “account_operator.cgi” CGI program of Zyxel USG FLEX series firmware versions 4.50 through 5.35, and VPN series firmware versions 4.30 through 5.35, which could allow a remote authenticated attacker to modify device configuration data, resulting in denial-of-service (DoS) conditions on an affected device.

Affected Products
Vendor
Zyxel Networks CorporationZyxel
Product
USG FLEX series firmware
Versions
Affected
  • 4.50 through 5.35
Vendor
Zyxel Networks CorporationZyxel
Product
VPN series firmware
Versions
Affected
  • 4.30 through 5.35
Problem Types
TypeCWE IDDescription
CWECWE-77CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')
Type: CWE
CWE ID: CWE-77
Description: CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')
Metrics
VersionBase scoreBase severityVector
3.18.1HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Version: 3.1
Base score: 8.1
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-of-firewalls-and-aps
N/A
Hyperlink: https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-of-firewalls-and-aps
Resource: N/A
▼Authorized Data Publishers (ADP)
1. CVE Program Container
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-of-firewalls-and-aps
x_transferred
Hyperlink: https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-of-firewalls-and-aps
Resource:
x_transferred
2. CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security@zyxel.com.tw
Published At:24 Apr, 2023 | 17:15
Updated At:04 May, 2023 | 13:17

A post-authentication command injection vulnerability in the “account_operator.cgi” CGI program of Zyxel USG FLEX series firmware versions 4.50 through 5.35, and VPN series firmware versions 4.30 through 5.35, which could allow a remote authenticated attacker to modify device configuration data, resulting in denial-of-service (DoS) conditions on an affected device.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Primary3.18.1HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Secondary3.18.1HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Type: Primary
Version: 3.1
Base score: 8.1
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Type: Secondary
Version: 3.1
Base score: 8.1
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
CPE Matches
Zyxel Networks Corporation
zyxel
>>usg_flex_100>>-
cpe:2.3:h:zyxel:usg_flex_100:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>usg_flex_100_firmware>>Versions from 4.50(inclusive) to 5.35(inclusive)
cpe:2.3:o:zyxel:usg_flex_100_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>usg_flex_100w>>-
cpe:2.3:h:zyxel:usg_flex_100w:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>usg_flex_100w_firmware>>Versions from 4.50(inclusive) to 5.35(inclusive)
cpe:2.3:o:zyxel:usg_flex_100w_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>usg_flex_200>>-
cpe:2.3:h:zyxel:usg_flex_200:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>usg_flex_200_firmware>>Versions from 4.50(inclusive) to 5.35(inclusive)
cpe:2.3:o:zyxel:usg_flex_200_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>usg_flex_50>>-
cpe:2.3:h:zyxel:usg_flex_50:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>usg_flex_50_firmware>>Versions from 4.50(inclusive) to 5.35(inclusive)
cpe:2.3:o:zyxel:usg_flex_50_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>usg_flex_50w>>-
cpe:2.3:h:zyxel:usg_flex_50w:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>usg_flex_50w_firmware>>Versions from 4.50(inclusive) to 5.35(inclusive)
cpe:2.3:o:zyxel:usg_flex_50w_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>usg_flex_500>>-
cpe:2.3:h:zyxel:usg_flex_500:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>usg_flex_500_firmware>>Versions from 4.50(inclusive) to 5.35(inclusive)
cpe:2.3:o:zyxel:usg_flex_500_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>usg_flex_700>>-
cpe:2.3:h:zyxel:usg_flex_700:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>usg_flex_700_firmware>>Versions from 4.50(inclusive) to 5.35(inclusive)
cpe:2.3:o:zyxel:usg_flex_700_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>vpn100>>-
cpe:2.3:h:zyxel:vpn100:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>vpn100_firmware>>Versions from 4.50(inclusive) to 5.35(inclusive)
cpe:2.3:o:zyxel:vpn100_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>vpn1000>>-
cpe:2.3:h:zyxel:vpn1000:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>vpn1000_firmware>>Versions from 4.50(inclusive) to 5.35(inclusive)
cpe:2.3:o:zyxel:vpn1000_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>vpn300>>-
cpe:2.3:h:zyxel:vpn300:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>vpn300_firmware>>Versions from 4.50(inclusive) to 5.35(inclusive)
cpe:2.3:o:zyxel:vpn300_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>vpn50>>-
cpe:2.3:h:zyxel:vpn50:-:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>vpn50_firmware>>Versions from 4.50(inclusive) to 5.35(inclusive)
cpe:2.3:o:zyxel:vpn50_firmware:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-77Primarynvd@nist.gov
CWE-77Secondarysecurity@zyxel.com.tw
CWE ID: CWE-77
Type: Primary
Source: nvd@nist.gov
CWE ID: CWE-77
Type: Secondary
Source: security@zyxel.com.tw
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-of-firewalls-and-apssecurity@zyxel.com.tw
Vendor Advisory
Hyperlink: https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-of-firewalls-and-aps
Source: security@zyxel.com.tw
Resource:
Vendor Advisory

Change History

0
Information is not available yet

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EPSS-11.66% / 93.75%
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CWE ID-CWE-77
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Certain Zyxel products allow command injection by an admin via an input string to chg_exp_pwd during a password-change action. This affects VPN On-premise before ZLD V4.39 week38, VPN Orchestrator before SD-OS V10.03 week32, USG before ZLD V4.39 week38, USG FLEX before ZLD V4.55 week38, ATP before ZLD V4.55 week38, and NSG before 1.33 patch 4.

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Product-zldvpn_orchestratornsgnsg_firmwareusg_flex_firmwareatpusg_flexn/a
CWE ID-CWE-77
Improper Neutralization of Special Elements used in a Command ('Command Injection')
Details not found