CVE-2017-7781

CVE-2017-7781 describes an error in Firefox's elliptic curve point addition algorithm (affecting versions prior to 55) that could incorrectly yield a "POINT_AT_INFINITY" result. This medium-severity vulnerability (CVSS 5.9) allows a man-in-the-middle attacker to interfere with connections, leading to the computation of an incorrect shared secret, though it requires high attack complexity. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.