Attack Chain

1. An attacker identifies a vulnerable PDKS instance running a version between V16.20200313 and VMYR_3.5.2025117.
2. The attacker crafts a series of malicious requests designed to exploit the improper control of interaction frequency.
3. The attacker sends a high volume of these requests to the vulnerable PDKS endpoint.
4. The PDKS system attempts to process each request, consuming excessive resources.
5. The system’s resources, such as CPU and memory, become saturated.
6. Legitimate user requests are delayed or dropped due to resource exhaustion.
7. The PDKS application becomes unresponsive or crashes, resulting in a denial of service.

Impact

Successful exploitation of CVE-2026-7402 can lead to a denial-of-service condition, rendering the MeWare PDKS application unavailable. The impact includes disruption of services relying on the application, potential data loss due to system instability, and negative reputational effects for the organization.

Recommendation

• Upgrade MeWare PDKS to version VMYR_3.5.2025117 or later to remediate CVE-2026-7402.
• Monitor web server logs for suspicious activity indicative of flooding attacks targeting PDKS applications, using a webserver log source.
• Deploy the Sigma rule DetectHighRequestRateToPDKS to identify potential exploitation attempts based on abnormally high request rates.