Microsoft ActiveSync 4.1, as used in Windows Mobile 5.0, uses weak encryption (XOR obfuscation with a fixed key) when sending the user's PIN/Password over the USB connection from the host to the device, which might make it easier for attackers to decode a PIN/Password obtained by (1) sniffing or (2) spoofing the docking process.

References

• https://nvd.nist.gov/vuln/detail/CVE-2007-5460
• https://exchange.xforce.ibmcloud.com/vulnerabilities/37223
• http://osvdb.org/38499
• http://securityreason.com/securityalert/3232
• http://www.securityfocus.com/archive/1/482299/100/0/threaded
• http://www.securityfocus.com/bid/25976