The L2TP implementation of MPD before 5.9 allows a remote attacker who can send specifically crafted L2TP control packet with AVP Q.931 Cause Code to execute arbitrary code or cause a denial of service (memory corruption).
The L2TP implementation of MPD before
DDoS
CVE-2020-7465
NVD
Refer to CVE-2020-7465 NVD advisory