Cisco Aironet 1800 devices with software 7.2, 7.3, 7.4, 8.1(112.3), 8.1(112.4), and 8.1(15.14) have a default account, which makes it easier for remote attackers to obtain access via unspecified vectors, aka Bug ID CSCuw58062.
The IP ingress packet handler on Cisco Aironet 1800 devices with software 8.1(112.3) and 8.1(112.4) allows remote attackers to cause a denial of service via a crafted header in an IP packet, aka Bug ID CSCuv63138.