CVE-2020-12526 describes a denial-of-service vulnerability affecting Beckhoff TwinCAT OPC UA Server (up to v2.3.0.12) and IPC Diagnostics UA Server (up to v3.1.0.1). An unauthenticated attacker can render the server unresponsive by sending several specially crafted requests. While the real-time functionality of IPCs remains unaffected, the server's unavailability could disrupt operations. This vulnerability has a CVSS score of 5.3 (Medium) due to its low attack complexity and network-based vector, leading to a low impact on availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 3.1.0.1CPE matchmatch criteria | cpe:2.3:a:beckhoff:ipc_diagnostics_ua_server:*:*:*:*:*:*:*:* | ||
<= 3.3.18CPE matchmatch criteria | cpe:2.3:a:beckhoff:tf6100:*:*:*:*:*:*:*:* | ||
<= 2.3.0.12CPE matchmatch criteria | cpe:2.3:a:beckhoff:twincat_opc_ua_server:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.