CVE-2026-4193: D-Link Dir-823g Firmware privilege escalation (CVSS 7.3)

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 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityLow

IntegrityLow

AvailabilityLow

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

Affected products

D-Link Dir-823g Firmware1.0.2b05

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

https://github.com/wudipjq/my_vuln/blob/main/D-Link7/vuln_91/91.mdExploitThird Party Advisory
https://github.com/wudipjq/my_vuln/blob/main/D-Link7/vuln_92/92.mdExploitThird Party Advisory
https://vuldb.com/?ctiid.351105Permissions RequiredVDB Entry
https://vuldb.com/?id.351105Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.769835Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.769836Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.769837Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.769838Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.769839Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.769841Third Party AdvisoryVDB Entry

and 1 more references

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2026-4193 being actively exploited?

CVE-2026-4193 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 1.83%.

How severe is CVE-2026-4193?

CVE-2026-4193 has a CVSS 3.1 base score of 7.3, rated high. EPSS estimates a 1.83% probability of exploitation.

Which products are affected by CVE-2026-4193?

Affected products include D-Link Dir-823g Firmware.

How do I fix CVE-2026-4193?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-4193 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation works Book a demo