er2 firmware vulnerabilities and fixes

Recent CVEs affecting er2 firmware, with upgrade or downgrade steps. 1 tracked.

Also searched as: er2firmware.

er2 firmware has 1 tracked vulnerability, 1 critical. A fixed release or vendor patch exists for 1. Most recent: 2025-12-30. Highest priority: CVE-2025-66848 (score 58/100).

• CVE-2025-66848 CRITICAL 9.8 UPGRADE UPGRADE JD Cloud NAS routers AX1800 (4.3.1.r4308 and earlier), AX3000 (4.3.1.r4318 and earlier), AX6600 (4.5.1.r4533 a

FAQ

How do I fix er2 firmware vulnerabilities?

Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.

Is er2 firmware being exploited right now?

None of the tracked er2 firmware CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.

Which er2 firmware CVE should I patch first?

CVE-2025-66848 currently ranks highest (58/100): JD Cloud NAS routers AX1800 (4.3.1.r4308 and earlier), AX3000 (4.3.1.r4318 and earlier), AX6600 (4.5.1.r4533 a.

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