CVE-2026-4499

Name: CVE-2026-4499
Creator: NVD / NIST
Published: 2026-03-20T20:16:50.207+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 3.20%

Last modified Jun 17, 2026

CVE-2026-4499 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. A vulnerability was determined in D-Link DIR-820LW 2.03. Affected is the function ssdpcgi_main of the component SSDP. EPSS estimates a 3.20% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS 4.0

5.5/10

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:X/V:X/RE:X/U:X

EPSS Probability

3.20%

86.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Dlink	Dir-820lw Firmware	2.03

References

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.zipExploit
https://github.com/yunleeeee/cve/issues/1Exploit
https://vuldb.com/?ctiid.352055Permissions Required, VDB Entry
https://vuldb.com/?id.352055Third Party Advisory, VDB Entry
https://vuldb.com/?submit.773883Third Party Advisory, VDB Entry
https://www.dlink.com/Product

Timeline

Published: Mar 20, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-4499?

How severe is CVE-2026-4499?

CVE-2026-4499 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 3.20% probability of exploitation in the next 30 days.

How do I fix CVE-2026-4499?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-4499?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST