Outlook Express 5.5 and 6.0 on Windows treats a carriage return ("CR") in a message header as if it were a valid carriage return/line feed combination (CR/LF), which could allow remote attackers to bypass virus protection and or other filtering mechanisms via a mail message with headers that only contain the CR, which causes Outlook to create separate headers.
No PoCs from references.
- https://github.com/GuiMatosInfra/explorer2sectool
- https://github.com/xaitax/SploitScan