High severity · published Mar 15, 2026
CVE-2026-4193
D-Link DIR-823G goahead UpdateClientInfo access control
7.5
CVSS
0.8%
EPSS
No
On KEV
Description
A security vulnerability has been detected in D-Link DIR-823G 1.0.2B05. The affected element is the function GetDDNSSettings/GetDeviceDomainName/GetDeviceSettings/GetDMZSettings/GetFirewallSettings/GetGuestNetworkSettings/GetLanWanConflictInfo/GetLocalMacAddress/GetNetworkSettings/GetQoSSettings/GetRouterInformationSettings/GetRouterLanSettings/GetWanSettings/SetAccessCtlList/SetAccessCtlSwitch/SetDeviceSettings/SetGuestWLanSettings/SetIPv4FirewallSettings/SetNetworkSettings/SetNetworkTomographySettings/SetNTPServerSettings/SetRouterLanSettings/SetStaticClientInfo/SetStaticRouteSettings/SetWLanRadioSecurity/SetWPSSettings/UpdateClientInfo of the component goahead. Such manipulation leads to improper access controls. The attack may be launched remotely. The exploit has been disclosed publicly and may be used. This vulnerability only affects products that are no longer supported by the maintainer.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 56% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DI
DIR-823G · D-Link
1.0.2B05 · source: vendor
DF
Dir-823g Firmware · Dlink
1.0.2b05 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-4193
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-4193
Exploit
https://github.com/wudipjq/my_vuln/blob/main/D-Link7/vuln_91/91.md
Exploit
https://github.com/wudipjq/my_vuln/blob/main/D-Link7/vuln_92/92.md
Permissions Required
https://vuldb.com/?ctiid.351105
Third Party Advisory
https://vuldb.com/?id.351105
Third Party Advisory
https://vuldb.com/?submit.769835
Third Party Advisory
https://vuldb.com/?submit.769836
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