Juniper Networks has patched a vulnerability in its routers The flaw was being abused by Chinese threat actors Multiple devices were vulnerable Juniper Networks has released a patch for a vulnerability that was being exploited in the wild to attack some of its router brands. According to the company’s security advisory, the bug is an improper isolation, or compartmentalization weakness, and it’s tracked as CVE-2025-21590. It was given a severity score of 6.7 (medium). The bug is used by Chinese hackers, who had been exploiting it since 2024 to backdoor vulnerable Juniper routers that reached end-of-life, a recent Madiant security...