CVE-2026-6180

A race condition exists in PaperCut MF when processing badge-swipe data from certain HP multifunction devices. Under specific network conditions involving dropped packets and out-of-order sequence counters, the server may incorrectly process fragmented data chunks. If a sequence reset notificatio...

CVE-2026-6180: Time-of-check Time-of-use (TOCTOU) Race Condition

A race condition exists in PaperCut MF when processing badge-swipe data from certain HP multifunction devices. Under specific network conditions involving dropped packets and out-of-order sequence counters, the server may incorrectly process fragmented data chunks. If a sequence reset notificatio...

Square: Delayed, fraudulent transactions possible with encrypted Square Reader devices due to lack of server-side verification of device transaction counter

Although Square Readers implement encryption, possibly with a Derived Unique Key Per Transaction DUKPT scheme, the transaction counter of a Square Reader device is not verified when performing server-side decryption of swipe data. During a valid sale, a malicious merchant or third party can recor...