CVE-2026-11492 - Vulnerability Details

- D-Link DIR-823G vsftpd vsftpd.conf least privilege violation

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.

Published: 2026-06-08

Score: 5.3 Medium

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Impact

The vulnerability exists in an unknown function of the vsftpd configuration file /etc/vsftpd.conf on D‑Link DIR‑823G firmware 1.0.2B05. Manipulating this configuration triggers a least‑privilege violation, allowing an attacker who can reach the device over the network to elevate privileges or bypass intended boundaries. The flaw can be exploited remotely, and a public exploit is available.

Affected Systems

Devices that run the D‑Link DIR‑823G router with firmware version 1.0.2B05 are impacted. No other firmware revisions are listed as affected.

Risk and Exploitability

The CVSS score of 5.3 denotes a medium level of severity. No EPSS value is provided and the vulnerability is not included in CISA’s KEV catalog. Because an attacker can externally manipulate the vsftpd configuration and a public exploit exists, the risk of privilege escalation should be considered moderate to high in a network that exposes the device to the internet.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

D-Link

DIR-823G

affected

Version	Status	Constraints
`1.0.2B05`	affected	—

Configuration 1 [-]

AND

cpe:2.3:o:dlink:dir-823g_firmware:1.0.2b05:*:*:*:*:*:*:*

cpe:2.3:h:dlink:dir-823g:-:*:*:*:*:*:*:*

No data.

Vendor Product Confidence Versions

D-link

Dir-823g

100%

Version	Status	Scheme	Platform
`1.0.2B05`	affected	generic	—

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Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

Upgrade the DIR‑823G to a firmware release that contains the vsftpd configuration fix.
If FTP service is not required, disable vsftpd or block its port 21 at the device or network firewall.
Restrict external access to the FTP service to trusted IP addresses and enable logging to monitor for suspicious activity.

Generated by OpenCVE AI on June 8, 2026 at 07:51 UTC.

Tracking

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Advisories

No advisories yet.

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

Access Vector Network

Access Complexity Low

Authentication Single

Confidentiality Impact None

Integrity Impact Partial

Availability Impact None

This CVE is not in the KEV list.

The EPSS score is 0.00511.

Exploitation poc

Automatable no

Technical Impact partial

References

Link	Providers
https://vuldb.com/cve/CVE-2026-11492
https://vuldb.com/submit/834816
https://vuldb.com/vuln/369112
https://vuldb.com/vuln/369112/cti
https://www.dlink.com/
https://www.notion.so/D-Link-DIR823G-V1-0-2B05_20181207-3671f5ba989080ac97fdc36d2fb5e57d?source=copy_link

History

Tue, 09 Jun 2026 16:30:00 +0000

Type	Values Removed	Values Added
First Time appeared		Dlink Dlink dir-823g Dlink dir-823g Firmware
CPEs		cpe:2.3:h:dlink:dir-823g:-:::::::* cpe:2.3:o:dlink:dir-823g_firmware:1.0.2b05:::::::*
Vendors & Products		Dlink Dlink dir-823g Dlink dir-823g Firmware

Mon, 08 Jun 2026 13:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Mon, 08 Jun 2026 06:30:00 +0000

Type	Values Removed	Values Added
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.
Title		D-Link DIR-823G vsftpd vsftpd.conf least privilege violation
First Time appeared		D-link D-link dir-823g
Weaknesses		CWE-266 CWE-272
CPEs		cpe:2.3:h:d-link:dir-823g::::::::
Vendors & Products		D-link D-link dir-823g
References		https://vuldb.com/cve/CVE-2026-11492 https://vuldb.com/submit/834816 https://vuldb.com/vuln/369112 https://vuldb.com/vuln/369112/cti https://www.dlink.com/ https://www.notion.so/D-Link-DIR823G-V1-0-2B05_20181207-3671f5ba989080ac97fdc36d2fb5e57d?source=copy_link
Metrics		cvssV2_0 `{'score': 4, 'vector': 'AV:N/AC:L/Au:S/C:N/I:P/A:N/E:POC/RL:ND/RC:UR'}` cvssV3_0 `{'score': 4.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R'}` cvssV3_1 `{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R'}` cvssV4_0 `{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P'}`

Subscriptions

D-link Dir-823g

Dlink Dir-823g Dir-823g Firmware

MITRE

Status: PUBLISHED

Assigner: VulDB

Published: 2026-06-08T05:30:09.936Z

Updated: 2026-06-08T13:00:43.295Z

Reserved: 2026-06-07T10:16:15.110Z

Link: CVE-2026-11492

Vulnrichment

Updated: 2026-06-08T13:00:37.875Z

NVD

Status : Analyzed

Published: 2026-06-08T07:16:26.850

Modified: 2026-06-09T16:17:15.573

Link: CVE-2026-11492

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-06-08T08:00:14Z

Weaknesses

CWE-266
Incorrect Privilege Assignment
CWE-272
Least Privilege Violation

Impact

Affected Systems

Risk and Exploitability

Tracking

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

Access Vector Network

Access Complexity Low

Authentication Single

Confidentiality Impact None

Integrity Impact Partial

Availability Impact None

Exploitation poc

Automatable no

Technical Impact partial

Subscriptions

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