Zyxel Prestige 681 and 1600 SDSL Routers allow remote attackers to cause a denial of service via malformed packets with (1) an IP length less than actual packet size, or (2) fragmented packets whose size exceeds 64 kilobytes after reassembly.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.037
EPSS Ranking 87.5%