GRE and GRE6 Protocols (RFC2784) do not validate or verify the source of a network packet
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.3epss 1.6%
exploitation probability
1.6%top 27% of all CVEs
observed exploitation
nono source reports it
GRE and GRE6 Protocols (RFC2784) do not validate or verify the source of a network packet allowing an attacker to spoof and route arbitrary traffic via an exposed network interface that can lead to spoofing, access control bypass, and other unexpected network behaviors.
This can be considered similar to CVE-2020-10136.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected products
IETF · RFC2784 - Generic Routing Encapsulation (GRE)