2011-10-12

Local privilege escalation in Windows afd.sys (Ancillary Function Driver) allows unauthenticated local attackers to gain SYSTEM privileges on Windows XP SP2/SP3 and Server 2003 SP2 through a crafted application requiring user interaction. CISA KEV confirms active exploitation in the wild, with EPSS score at 67.09% (99th percentile) indicating extremely high real-world exploitation likelihood. Multiple public exploit codes exist (Exploit-DB 21844, 18176), making this vulnerability trivially exploitable despite its age. Microsoft released patches via MS11-080 in October 2011, but legacy systems remain vulnerable.