Critical severity · published Mar 20, 2026
CVE-2026-4499
D-Link DIR-820LW SSDP ssdpcgi_main os command injection
9.8
CVSS
3.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.7% · higher than 90% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DI
DIR-820LW · D-Link
2.03 · source: vendor
DF
Dir-820lw Firmware · Dlink
2.03 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-4499
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-4499
Exploit
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
https://github.com/yunleeeee/cve/issues/1
Permissions Required
https://vuldb.com/?ctiid.352055
Third Party Advisory
https://vuldb.com/?id.352055
Third Party Advisory
https://vuldb.com/?submit.773883
Product
https://www.dlink.com/