Vulnerability record · CVE-2026-4499 · published 20 March 2026

CVE-2026-4499: Dlink dir-820lw firmware command injection vulnerability

Dlink · Dir 820lw Firmware

A vulnerability was determined in D-Link DIR-820LW 2.03. Affected is the function ssdpcgi_main of the component SSDP. Executing a manipulation can lead to os command injection. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized.

5.5 CVSS 4.0 Medium EPSS 4.7% · top 8.6% CWE-77 · Command injectionCWE-78 · OS command injection

5.5CVSS 4.0 base score, v2 7.5

4.7%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

6References, 2 tagged exploit

17 Jun 2026Last modified by NVD

Description

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Dir 820lw Firmware Dlink

References

Link	Tags
https://github.com/user-attachments/files/25790888/OS.Command.Injection.in.D-Link.DIR-820LW.B2.03.via.the.HTTP_ST.enviro	Exploit
https://github.com/yunleeeee/cve/issues/1	Exploit
https://vuldb.com/?ctiid.352055	Permissions RequiredVDB Entry
https://vuldb.com/?id.352055	Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.773883	Third Party AdvisoryVDB Entry
https://www.dlink.com/	Product

Track CVE-2026-4499 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-45382D-Link DIR series routers command injection in DDNS functionAn OS command injection flaw exists in the DDNS function of the ncc2 binary on multiple D-Link DIR router models (DIR-810L, DIR-820L/LW, DIR-826L, DI…KEVEPSS 98%analysed17 Feb 2022 9.8CVE-2024-41610Dlink dir-820lw firmware hard-coded credentials vulnerabilityD-Link DIR-820LW REVB FIRMWARE PATCH 2.03.B01_TC contains hardcoded credentials in the Telnet service, enabling attackers to log in remotely to the T…EPSS 0.85%30 Jul 2024 9.8CVE-2026-8037Progress LoadMaster API OS Command Injection RCEProgress LoadMaster (and related ADC products) contain an OS command injection flaw in multiple API command endpoints where unsanitized input is pass…KEVEPSS 77%analysed4 Jun 2026 8.7CVE-2026-42271LiteLLM MCP test endpoints allow authenticated OS command injectionLiteLLM versions 1.74.2 through before 1.83.7 expose two MCP preview endpoints (POST /mcp-rest/test/connection and POST /mcp-rest/test/tools/list) th…KEVEPSS 13%analysed8 May 2026 7.2CVE-2025-29635D-Link DIR-823X command injection in set_prohibiting handlerD-Link DIR-823X firmware (240126 and 240802) contains a command injection flaw in the /goform/set_prohibiting POST handler. An attacker who already h…KEVEPSS 88%analysed25 Mar 2025 8.1CVE-2026-22719VMware Aria Operations command injection during support-assisted migrationVMware Aria Operations contains a command injection flaw (CWE-77) that an unauthenticated attacker can use to run arbitrary commands, potentially ach…KEVEPSS 18%analysed25 Feb 2026 8.7CVE-2025-4008Meteobridge web interface command injection without authenticationThe Meteobridge web interface, built from CGI shell scripts and C, exposes an endpoint vulnerable to command injection. Because the endpoint also lac…KEVEPSS 94%analysed21 May 2025 6.1CVE-2025-59689Libraesva ESG command injection via compressed email attachmentLibraesva Email Security Gateway versions 4.5 through 5.5.x before 5.5.7 are vulnerable to command injection triggered by a compressed email attachme…KEVEPSS 1.9%analysed19 Sep 2025

Source: NIST National Vulnerability Database (record CVE-2026-4499), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.