AVM Fritz!Box 7050, and possibly other product models, allows remote attackers to cause a denial of service (VoIP application crash) via a zero-length UDP packet to the SIP port (port 5060).

The AVM KEN! web server allows remote attackers to read arbitrary files via a .. (dot dot) attack.

The AVM KEN! ISDN Proxy server allows remote attackers to cause a denial of service via a malformed request.

Improper Verification of Cryptographic Signature in AVM FRITZ!Box 6810 LTE after firmware 5.22, FRITZ!Box 6840 LTE after firmware 5.23, and other models with firmware 5.50.

AVM FRITZ!OS before 6.30 extracts the contents of firmware updates before verifying their cryptographic signature, which allows remote attackers to create symlinks or overwrite critical files, and consequently execute arbitrary code, via a crafted firmware image.

AVM Fritz!Box allows remote attackers to execute arbitrary commands via shell metacharacters in the var:lang parameter to cgi-bin/webcm.

Cross-site scripting (XSS) vulnerability in the Push-Service-Mails feature in AVM FRITZ!OS before 6.30 allows remote attackers to inject arbitrary web script or HTML via the display name in the FROM field of an SIP INVITE message.

FRITZ!OS before 7.21 on FRITZ!Box devices allows a bypass of a DNS Rebinding protection mechanism.

Information Leakage in PPPoE Packet Padding in AVM Fritz!Box 7490 with Firmware versions Fritz!OS 6.80 and 6.83 allows physically proximate attackers to view slices of previously transmitted packets or portions of memory via via unspecified vectors.