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CVE-2026-11492— D-Link DIR-823G vsftpd vsftpd.conf least privilege violation

Quick assessment

Affected
D-Link DIR-823G
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

D-Link DIR-823G是中国友讯（D-Link）公司的一款无线路由器。 D-Link DIR-823G 1.0.2B05版本存在安全漏洞，该漏洞源于vsftpd组件中文件/etc/vsftpd.conf的错误操作，可能导致违反最小权限原则。

CVSS 4.3 · Medium EPSS 0.51% · P42

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
D-Link DIR-823G 1.0.2B05 affected
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I. Basic Information for CVE-2026-11492

Vulnerability Information
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Vulnerability Title
D-Link DIR-823G vsftpd vsftpd.conf least privilege violation
Source: CVE Program / CVE List V5
Vulnerability Description
A security flaw has been discovered in D-Link DIR-823G 1.0.2B05. The affected element is an unknown function of the file /etc/vsftpd.conf of the component vsftpd. Performing a manipulation results in least privilege violation. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
最小特权原则违背
Source: CVE Program / CVE List V5
Vulnerability Title
D-Link DIR-823G 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
D-Link DIR-823G是中国友讯（D-Link）公司的一款无线路由器。 D-Link DIR-823G 1.0.2B05版本存在安全漏洞，该漏洞源于vsftpd组件中文件/etc/vsftpd.conf的错误操作，可能导致违反最小权限原则。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
D-Link DIR-823G 1.0.2B05 cpe:2.3:h:d-link:dir-823g:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-11492

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III. Intelligence Information for CVE-2026-11492

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Vendor Pages for CVE-2026-11492 (1)

Other References for CVE-2026-11492 (1)

Same Patch Batch · D-Link · 2026-06-08 · 3 CVEs total

CVE-2026-11497 5.3 MEDIUM D-Link DCS-5615 Boa Webserver boa.conf least privilege violation
CVE-2026-11555 3.7 LOW D-Link DGS-1100-08PD Web boa.conf least privilege violation

IV. Related Vulnerabilities

Same product: DIR-823G
Same vendor: D-Link
Same weakness: CWE-272

V. Comments for CVE-2026-11492

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