r/dktechsupport • u/QuirkyBookkeeper3504 • 13h ago
Netværk Hiper nægtede at opdatere sårbar 5G-router i månedsvis – indtil der kom juridisk påkrav. Kører andre stadig på sårbar version?
Er du Hiper 5G-kunde med en Zyxel NR5307-router? Tjek lige din firmware!
Hvis du har 5G-bredbånd gennem Hiper og har fået leveret en Zyxel NR5307, er der en reel risiko for, at din router kører på en forældet og sårbar firmware.
Zyxel udsendte allerede i september 2024 et sikkerhedsvarsel om en kritisk buffer overflow-sårbarhed i denne model og frigav en rettelse. Fordi Hiper låser modemet for manuelle opdateringer, er det udelukkende dem, der kan udrulle patchen via deres systemer.
Efter måneders ventetid og gentagne henvendelser har de netop opdateret mit modem manuelt – hvilket tyder på, at de ikke har rullet den ud automatisk til alle andre kunder endnu.
Sådan tjekker du din version på 1 minut:
- Gå til 192.168.1.1 i din browser (mens du er forbundet til dit Wi-Fi).
- Log ind (koden står i bunden af routeren, hvis du ikke har ændret den).
- Tjek firmwareversionen på oversigten / System Info.
👉 Kører dit modem stadig på version V1.00(ACOM.0)b1 (eller en anden ældre version)?
Smid meget gerne en kommentar herunder med din model og firmwareversion. Hvis mange stadig sidder på den sårbare version, skal det samles og tages videre til Hiper / myndighederne.
# English
Hiper 5G customers using the Zyxel NR5307: check your firmware version!
If you have 5G home internet with Hiper using the Zyxel NR5307 modem, your router might be running an unpatched firmware build exposed to a known vulnerability.
Back in September 2024, Zyxel published a security advisory for a critical buffer overflow vulnerability affecting this device and released patched firmware. Because Hiper locks the modem against manual user updates, only their IT team can deploy the fix remotely.
After months of waiting and a formal escalation, Hiper pushed the update directly to my unit alone—suggesting they have a working build ready, but have not rolled it out fleet-wide to other customers.
How to check yours in 1 minute:
- Open your browser and go to 192.168.1.1 (while connected to your home Wi-Fi).
- Log into the web dashboard (default credentials are on the sticker under the modem).
- Look at Firmware Version under System Info / Maintenance.
👉 Is your router still on V1.00(ACOM.0)b1 (or another older build)?
Drop a comment below with your firmware version. If Hiper is leaving customer modems unpatched while only updating individual devices upon formal complaint, we need to document this pattern and take it to the telecom regulator.


Link to Zyxel security advisory that started my engagement with customer support: https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-buffer-overflow-vulnerability-in-some-5g-nr-cpe-dsl-ethernet-cpe-fiber-ont-wifi-extender-and-security-router-devices-09-03-2024
(since the start of this, there have been new CVEs reported by Zyxel, both for this specific device and others, but seems like the latest FW they pushed to my device covers all the relevant advisories as of now)