CVE-2020-12521

low-risk
Published 2020-12-17

On Phoenix Contact PLCnext Control Devices versions before 2021.0 LTS a specially crafted LLDP packet may lead to a high system load in the PROFINET stack. An attacker can cause failure of system services or a complete reboot.

Do I need to act?

-
0.08% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.5/10 Medium
ADJACENT_NETWORK / LOW complexity

Affected Products (1)

Plcnext Firmware

Affected Vendors

Phoenixcontact

References (2)

Third Party Advisory https://cert.vde.com/en-us/advisories/vde-2020-049
Third Party Advisory https://cert.vde.com/en-us/advisories/vde-2020-049
26
/ 100
low-risk
Severity 21/34 · High
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal