Deviceways

Router

D-Link DIR-853

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Projects for this device

Replacement firmware

Replace router software with a customizable system for network controls and community packages.

How to get started

Follow the guide for your exact router version. The first installation may use its web interface, recovery mode or a serial connection.

Setup
Firmware replacement; route varies by router
You’ll need
Exact hardware revision, an appropriate OpenWrt release and its model-specific installation guide.
A1 · MediaTek MT7621AT
Memory: 128 MBGet OpenWrt firmware Release listed · 25.12.6Open hardware record Release listed · 25.12.5
A3 · MediaTek MT7621DAT
Memory: 256 MBGet OpenWrt firmware Release listed · 25.12.6
R1 · MediaTek MT7621AT
Memory: 128 MBGet OpenWrt firmware Release listed · 25.12.6Open hardware record Release listed · 25.12.5
A1
Get firmware Release listed · 25.12.5
A1 · MediaTek MT7621A
Open hardware record Release listed · 25.12.5
rev A3 · MediaTek MT7621DAT
Open hardware record
A3
Open hardware record Release listed · 25.12.5
MediaTek MT7621AT
Open hardware record
R1 · MediaTek MT7621AT
Open hardware record Release listed · 25.12.5
Original project github.com

A1 · MediaTek MT7621AT

First installation
GUI OEM; U-Boot TFTP + serial recovery

R1 · MediaTek MT7621AT

First installation
D-Link Recovery GUI
Sources

Features & details

Check the project and hardware shown for each feature.

Device details

d-link dir-853 a3 — device documentation (github.com)

Hardware revision
A3

Device details

d-link dir-853 r1 — device documentation (github.com)

Hardware revision
R1

Device details

D-Link DIR-853 rev A1 — TechInfoDepot (github.com)D-Link DIR-853 rev A1 — WikiDevi (github.com)

Hardware revision
A1

Device details

D-Link DIR-853 rev A3 — TechInfoDepot (github.com)

Hardware revision
rev A3

Device details

Device details — Source documentation (openwrt.org)

Hardware revision
A1

OpenWrt · A1 · MediaTek MT7621AT

OpenWrt · A1 · MediaTek MT7621AT — Source documentation (openwrt.org)

Installation routes recorded
GUI OEM, U-Boot TFTP + serial recovery
Recovery routes recorded
Serial, U-Boot TFTP + serial recovery
Availability recorded by source
Discontinued 2023

Device details

Device details — Source documentation (openwrt.org)

Hardware revision
A3

Device details

Device details — Source documentation (openwrt.org)

Hardware revision
R1

OpenWrt · R1 · MediaTek MT7621AT

OpenWrt · R1 · MediaTek MT7621AT — Source documentation (openwrt.org)

Installation routes recorded
D-Link Recovery GUI
Recovery routes recorded
D-Link Recovery GUI

Hardware differences

Technical references

Security

Saved scan

From our saved security research.

Model advisories

Selected highlights

Prioritized by known exploitation, severity, then date.

CVE published

CVSS 9.8 (v3.1)

D-Link DIR-853

D-Link DIR-853 A1 FW1.20B07 was discovered to contain a stack-based buffer overflow vulnerability via the Password parameter in the SetWanSettings module.

CVE-2025-25746

Affected firmware
Version scope unspecified in source
Fix
Fix details in the linked record
Read mitre CVE record
Details and sources
CVE updated

D-Link DIR-853 A1 FW1.20B07 was discovered to contain a stack-based buffer overflow vulnerability via the Password parameter in the SetWanSettings module.

CVE published

CVSS 9.8 (v3.1)

D-Link DIR-853

D-Link DIR-853 A1 FW1.20B07 was discovered to contain a stack-based buffer overflow vulnerability via the Password parameter in the SetDynamicDNSSettings module.

CVE-2025-25744

Affected firmware
Version scope unspecified in source
Fix
Fix details in the linked record
Read mitre CVE record
Details and sources
CVE updated

D-Link DIR-853 A1 FW1.20B07 was discovered to contain a stack-based buffer overflow vulnerability via the Password parameter in the SetDynamicDNSSettings module.

CVE published

CVSS 9.8 (v3.1)

D-Link DIR-853

D-Link DIR-853 A1 FW1.20B07 was discovered to contain a stack-based buffer overflow vulnerability via the AccountPassword parameter in the SetSysEmailSettings module.

CVE-2025-25742

Affected firmware
Version scope unspecified in source
Fix
Fix details in the linked record
Read mitre CVE record
Details and sources
CVE updated

D-Link DIR-853 A1 FW1.20B07 was discovered to contain a stack-based buffer overflow vulnerability via the AccountPassword parameter in the SetSysEmailSettings module.

CVE published

CVSS 8.8 (v3.1)

D-Link DIR-853

D-Link DIR-853 A1 FW1.20B07 was discovered to contain a stack-based buffer overflow vulnerability via the Password parameter in the SetQuickVPNSettings module.

CVE-2025-25745

Affected firmware
Version scope unspecified in source
Fix
Fix details in the linked record
Read mitre CVE record
Details and sources
CVE updated

D-Link DIR-853 A1 FW1.20B07 was discovered to contain a stack-based buffer overflow vulnerability via the Password parameter in the SetQuickVPNSettings module.

CVE published

CVSS 7.2 (v3.1)

D-Link DIR-853

D-Link DIR-853 A1 FW1.20B07 was discovered to contain a command injection vulnerability in the SetVirtualServerSettings module.

CVE-2025-25743

Affected firmware
Version scope unspecified in source
Fix
Fix details in the linked record
Read mitre CVE record
Details and sources
CVE updated

D-Link DIR-853 A1 FW1.20B07 was discovered to contain a command injection vulnerability in the SetVirtualServerSettings module.

Check more security advisories for this device · CVE.org