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Vulnerability Details :

CVE-2022-45440

Summary
Assigner-Zyxel
Assigner Org ID-96e50032-ad0d-4058-a115-4d2c13821f9f
Published At-17 Jan, 2023 | 00:00
Updated At-17 Dec, 2025 | 08:33
Rejected At-
Credits

A vulnerability exists in the FTP server of the Zyxel AX7501-B0 firmware prior to V5.17(ABPC.3)C0, which processes symbolic links on external storage media. A local authenticated attacker with administrator privileges could abuse this vulnerability to access the root file system by creating a symbolic link on external storage media, such as a USB flash drive, and then logging into the FTP server on a vulnerable 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:17 Jan, 2023 | 00:00
Updated At:17 Dec, 2025 | 08:33
Rejected At:
▼CVE Numbering Authority (CNA)

A vulnerability exists in the FTP server of the Zyxel AX7501-B0 firmware prior to V5.17(ABPC.3)C0, which processes symbolic links on external storage media. A local authenticated attacker with administrator privileges could abuse this vulnerability to access the root file system by creating a symbolic link on external storage media, such as a USB flash drive, and then logging into the FTP server on a vulnerable device.

Affected Products
Vendor
Zyxel Networks CorporationZyxel
Product
AX7501-B0 firmware
Default Status
unaffected
Versions
Affected
  • < V5.17(ABPC.3)C0
Problem Types
TypeCWE IDDescription
CWECWE-59CWE-59 Improper Link Resolution Before File Access ('Link Following')
Type: CWE
CWE ID: CWE-59
Description: CWE-59 Improper Link Resolution Before File Access ('Link Following')
Metrics
VersionBase scoreBase severityVector
3.14.4MEDIUM
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Version: 3.1
Base score: 4.4
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
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-cleartext-storage-of-wifi-credentials-and-improper-symbolic-links-of-ftp-for-ax7501-b0-cpe
N/A
Hyperlink: https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-cleartext-storage-of-wifi-credentials-and-improper-symbolic-links-of-ftp-for-ax7501-b0-cpe
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-cleartext-storage-of-wifi-credentials-and-improper-symbolic-links-of-ftp-for-ax7501-b0-cpe
x_transferred
Hyperlink: https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-cleartext-storage-of-wifi-credentials-and-improper-symbolic-links-of-ftp-for-ax7501-b0-cpe
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:17 Jan, 2023 | 02:15
Updated At:17 Dec, 2025 | 09:15

A vulnerability exists in the FTP server of the Zyxel AX7501-B0 firmware prior to V5.17(ABPC.3)C0, which processes symbolic links on external storage media. A local authenticated attacker with administrator privileges could abuse this vulnerability to access the root file system by creating a symbolic link on external storage media, such as a USB flash drive, and then logging into the FTP server on a vulnerable 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
Secondary3.14.4MEDIUM
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Primary3.14.4MEDIUM
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Type: Secondary
Version: 3.1
Base score: 4.4
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Type: Primary
Version: 3.1
Base score: 4.4
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
CPE Matches

Zyxel Networks Corporation
zyxel
>>ax7501-b0_firmware>>Versions before 5.17\(abpc.3\)c0(exclusive)
cpe:2.3:o:zyxel:ax7501-b0_firmware:*:*:*:*:*:*:*:*
Zyxel Networks Corporation
zyxel
>>ax7501-b0>>-
cpe:2.3:h:zyxel:ax7501-b0:-:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-59Primarysecurity@zyxel.com.tw
CWE-59Secondarynvd@nist.gov
CWE ID: CWE-59
Type: Primary
Source: security@zyxel.com.tw
CWE ID: CWE-59
Type: Secondary
Source: nvd@nist.gov
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-cleartext-storage-of-wifi-credentials-and-improper-symbolic-links-of-ftp-for-ax7501-b0-cpesecurity@zyxel.com.tw
Vendor Advisory
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-cleartext-storage-of-wifi-credentials-and-improper-symbolic-links-of-ftp-for-ax7501-b0-cpeaf854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
Hyperlink: https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-cleartext-storage-of-wifi-credentials-and-improper-symbolic-links-of-ftp-for-ax7501-b0-cpe
Source: security@zyxel.com.tw
Resource:
Vendor Advisory
Hyperlink: https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-cleartext-storage-of-wifi-credentials-and-improper-symbolic-links-of-ftp-for-ax7501-b0-cpe
Source: af854a3a-2127-422b-91ae-364da2661108
Resource:
Vendor Advisory

Change History

0
Information is not available yet

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Action-Not Available
Vendor-openprintingOpenPrintingopenprintingDebian GNU/Linux
Product-debian_linuxcupscupscups
CWE ID-CWE-252
Unchecked Return Value
CWE ID-CWE-59
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Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
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Product-mt6855mt6873mt6893mt6833mt6885mt6983mt6877mt6781mt6891mt6883mt6853mt6789mt8789androidmt6769mt6875mt8797mt6889mt8185mt8791mt6785MT6769, MT6781, MT6785, MT6789, MT6833, MT6853, MT6855, MT6873, MT6875, MT6877, MT6883, MT6885, MT6889, MT6891, MT6893, MT6983, MT8185, MT8789, MT8791, MT8797
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Known To Be Used In Ransomware Campaigns?-Not Available
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Vendor-Google LLCMediaTek Inc.
Product-mt6873mt6893mt8765mt6580mt8788mt6983mt8735mt8167mt6765mt6891mt6883mt6853tmt6739mt8768mt8789mt6769mt6761mt6875mt6889mt8797mt8321mt6768mt8362amt8786mt8766mt6771mt6833mt6885mt6877mt6762mt6781mt8365mt6853mt6895mt8168mt6789androidmt8185mt8791mt6779mt8163mt6785mt8735bmt6879mt8173MT6580, MT6739, MT6761, MT6762, MT6765, MT6768, MT6769, MT6771, MT6779, MT6781, MT6785, MT6789, MT6833, MT6853, MT6853T, MT6873, MT6875, MT6877, MT6879, MT6883, MT6885, MT6889, MT6891, MT6893, MT6895, MT6983, MT8163, MT8167, MT8168, MT8173, MT8185, MT8321, MT8362A, MT8365, MT8735, MT8735B, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797
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Details not found