TI-2026-83566 Aliases CVE-2026-120189 GHSA-2j25-rfrh-cphw

Stack-based buffer overflow in D-Link DIR-505 TFTP upload handler

HIGH 82CWE-119Published 2026-11-01 · Updated 2026-11-05

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

Versions from 1.10B02 of the D-Link DIR-505 are affected. The TFTP upload filename handler in /usr/bin/tftpd contains a stack-based buffer overflow in mp_upload_file, tracked as CWE-121. A remote attacker can trigger it without authentication or user interaction. A public exploit is available.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Description from the CNA

A vulnerability was identified in D-Link DIR-505 1.10B02. Affected is the function save_upload_file/mp_upload_file of the file /usr/bin/tftpd of the component TFTP Upload Filename Handler. The manipulation leads to stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit is publicly available and might be used.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.01346 71st percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
D-Link	DIR-505	1.10B02	—	No fix listed	CNA

DIR-505 VendorD-Link Affected 1.10B02 Fixed in — No fix listed CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:h:d-link:dir-505::::::::	—	—	D-Link

cpe:2.3:h:d-link:dir-505:*:*:*:*:*:*:*:* Versions — — ·D-Link

Remediation

The sources list no fixed version for D-Link DIR-505.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Timeline

2026-11-01 Threatist record created from CVE-2026-120189
2026-11-01 Alias added: GHSA-2j25-rfrh-cphw
2026-11-05 CISA SSVC decision points changed
2026-11-05 Priority changed: MEDIUM → HIGH

References

Exploit 1

https://github.com/Walnut1337/DIR-505_filename_rce/tree/main/poc

Other 1

https://www.dlink.com/

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TI-2024-03069 D-Link DNS-320L/DNS-325/DNS-327L/DNS-340L HTTP GET Request nas_sharing.cgi hard-coded credentials KEVCVSS 3.1CRITICAL 9.8
TI-2024-00708 D-Link DIR-859 HTTP POST Request hedwig.cgi path traversal KEVCVSS 3.1CRITICAL 9.8
TI-2023-10693 OS Command injection vulnerability in D-Link DIR820LA1_FW105B03 allows attackers to… KEVCVSS 3.1CRITICAL 9.8
TI-2022-17249 D-Link Go-RT-AC750 GORTAC750_revA_v101b03 and GO-RT-AC750_revB_FWv200b02 are vulnerable… KEVCVSS 3.1CRITICAL 9.8
TI-2022-09657 D-Link DIR-820L 1.05B03 was discovered to contain remote command execution (RCE)… KEVCVSS 3.1CRITICAL 9.8

See all 979 →

Sources

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