TI-2021-12778 Aliases CVE-2021-33269 GHSA-r334-g882-8c3g

D-Link DIR-809 devices with firmware through DIR-809Ax_FW1.12WWB03_20190410 were…

MEDIUM 49CWE-787Published 2021-12-01 · Updated 2024-08-03

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

D-Link DIR-809 devices with firmware through DIR-809Ax_FW1.12WWB03_20190410 were discovered to contain a stack buffer overflow vulnerability in the function FUN_8004776c in /formVirtualServ. This vulnerability is triggered via a crafted POST request.

Why it matters now

EPSS 0.03957 90th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:dlink:dir-809_firmware::::::::	up to 1.12wwb03	Vulnerable	D-Link Japan K.K.
cpe:2.3:h:dlink:dir-809:-:::::::*	not specified by NVD	Running on	D-Link Japan K.K.

cpe:2.3:o:dlink:dir-809_firmware:*:*:*:*:*:*:*:* Versions up to 1.12wwb03 Vulnerable ·D-Link Japan K.K.
cpe:2.3:h:dlink:dir-809:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·D-Link Japan K.K.

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-33269
2026-10-03 Alias added: GHSA-r334-g882-8c3g

References

Exploit 1

https://github.com/Lnkvct/IoT-poc/tree/master/D-Link-DIR809/vuln01

Advisory 1

https://www.dlink.com/en/security-bulletin/

TI-2014-06873 The miniigd SOAP service in Realtek SDK allows remote attackers to execute arbitrary code… KEVCVSS 3.1CRITICAL 9.8
TI-2021-12775 D-Link DIR-809 devices with firmware through DIR-809Ax_FW1.12WWB03_20190410 were… CVSS 3.1CRITICAL 9.8
TI-2021-12774 D-Link DIR-809 devices with firmware through DIR-809Ax_FW1.12WWB03_20190410 were… CVSS 3.1CRITICAL 9.8
TI-2021-12781 D-Link DIR-809 devices with firmware through DIR-809Ax_FW1.12WWB03_20190410 were… CVSS 3.1CRITICAL 9.8
TI-2021-12780 D-Link DIR-809 devices with firmware through DIR-809Ax_FW1.12WWB03_20190410 were… CVSS 3.1CRITICAL 9.8
TI-2021-12779 D-Link DIR-809 devices with firmware through DIR-809Ax_FW1.12WWB03_20190410 were… CVSS 3.1CRITICAL 9.8

See all 8 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences