PT-2026-26664 · D Link · D-Link Dir-820L

Junqi · Published 2026-03-20 · Updated 2026-03-21 · CVE-2026-4499

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions D-Link DIR-820LW version 2.03

Description A flaw exists in the SSDP component’s ssdpcgi main function that could allow for operating system command injection. Successful exploitation may occur remotely. The exploit has been publicly disclosed.

Recommendations Update to a newer version that contains a fix for this vulnerability. As a temporary workaround, consider disabling the SSDP functionality until a patch is available.

Exploit

Fix

OS Command Injection

Command Injection

Weakness Enumeration

CWE-78

CWE-77

Related Identifiers

CVE-2026-4499

Affected Products

D-Link Dir-820L

References · 9

• 🔥❌ https://github.com/user-attachments/files/25790888/OS.Command.Injection.in.D-Link.DIR-820LW.B2.03.via.the.HTTP_ST.environment.variable.in.ssdpcgi_main.function.zip · Exploit, Deleted
• 🔥 https://github.com/yunleeeee/cve/issues/1 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-4499 · Security Note
• https://vuldb.com/?ctiid.352055 · Note
• https://twitter.com/infoflowcloud/status/2035262980808487128 · Twitter Post
• https://twitter.com/CVEnew/status/2035262169751708125 · Twitter Post
• https://dlink.com · Note
• https://vuldb.com/?id.352055 · Note
• https://vuldb.com/?submit.773883 · Note