# CVE-2026-11492: D-Link DIR-823G privilege escalation in vsftpd.conf

Source: https://junglewise.ai/threats/cve-2026-11492-d-link-dir-823g-privilege-escalation-in-vsftpd-conf  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-08. Updated: 2026-06-08  
License: CC BY 4.0 with a link back

CVE-2026-11492 · Severity: medium · CVSS 4.3 · Published 2026-06-08

A security flaw exists in the D-Link DIR-823G router, a device used to provide internet connectivity and local networking. An attacker can exploit a configuration error in the file transfer service to gain unauthorized permissions. This could allow a user with low-level access to perform actions they should not be permitted to do, potentially compromising the integrity of files on the device.

Technologies: [D-Link DIR-823G](https://junglewise.ai/threats/technologies/dir-823g). Vendors: [D-Link](https://junglewise.ai/threats/vendors/d-link).

## Quick answers

**Is CVE-2026-11492 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-11492 being exploited in the wild.

**How severe is CVE-2026-11492?** Medium severity, with a CVSS score of 4.3, published 8 June 2026.

**Which products and versions are affected?** D-Link DIR-823G 1.0.2B05.

**Is there a fix for CVE-2026-11492?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-11492 attacked?** It is attacked over the network, in device firmware.

**Am I affected by CVE-2026-11492?** Check whether you run D-Link DIR-823G at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A least privilege violation (CWE-272) exists in the D-Link DIR-823G firmware version 1.0.2B05. The vulnerability is rooted in the configuration of the vsftpd component, specifically within the /etc/vsftpd.conf file. A remote attacker with low-privileged credentials can manipulate the service to gain unauthorized permissions (Incorrect Privilege Assignment, CWE-266). While the specific function within the configuration file is not identified, the flaw allows for a remote attack vector. Public exploit code has been released, increasing the risk of exploitation.

## Affected products

- D-Link DIR-823G 1.0.2B05

## Timeline

- 2026-06-08: disclosed: Initial disclosure via VulDB/NVD

## References

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

## Related threats

- [D-Link DIR-823G stack buffer overflow in SetStaticRouteSettings](https://junglewise.ai/threats/cve-2026-90680-d-link-dir-823g-stack-buffer-overflow-in-setstaticroutesettings)
- [D-Link DIR-823G privilege escalation in web interface](https://junglewise.ai/threats/cve-2026-15270-d-link-dir-823g-privilege-escalation-in-web-interface)
- [D-Link DIR-823G command injection in timelycheck and sysconf binaries](https://junglewise.ai/threats/cve-2025-60671-d-link-dir-823g-command-injection-in-timelycheck-and-sysconf)