VULNERABILITY INTELLIGENCE
CVE-2006-4650
CVSS score2.6 LOW
EPSS probability3.23%
CISA KEVNot currently listed
Published2006-09-09
Last modified2026-06-16
CVSS vectorAV:N/AC:H/Au:N/C:P/I:N/A:N
Description
Cisco IOS 12.0, 12.1, and 12.2, when GRE IP tunneling is used and the RFC2784 compliance fixes are missing, does not verify the offset field of a GRE packet during decapsulation, which leads to an integer overflow that references data from incorrect memory locations, which allows remote attackers to inject crafted packets into the routing queue, possibly bypassing intended router ACLs.