CVE-2025-63353: A vulnerability in FiberHome GPON ONU HG6145F1 RP4423 allows the device's factory default Wi-Fi password (WPA/

This week

CRITICAL 9.8REMOTEMITIGATE

CVE-2025-63353 is a critical-severity flaw (CVSS 9.8) affecting hg6145f1 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability in FiberHome GPON ONU HG6145F1 RP4423 allows the device's factory default Wi-Fi password (WPA/WPA2 pre-shared key) to be predicted from the SSID. The device generates default passwords using a deterministic algorithm that derives the router passphrase from the SSID, enabling an attacker who can observe the SSID to predict the default password without authentication or user interaction.

Why this priority

Critical severity
Public exploit reference
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.3% (top 29%)
CISA exploited list	No
Weakness	CWE-284
Published	2025-11-12
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: fiberhome

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-11-12 16:15 UTCPublished CVE record published
2026-06-17 09:53 UTCUpdated Record last modified

fiberhome hg6145f1 firmware MITIGATE

Affected: rp4423

Fixed in: no fixed release known

Safe to downgrade to: a release before rp4423

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora ELN · openjpeg · FIXED · 2.5.4-5.eln159 · FEDORA-2026-1a5f60f401 · source

sudo dnf upgrade --advisory=FEDORA-2026-1a5f60f401

Fedora 46 · trustedqsl · FIXED · 2.8.7-1.fc46 · FEDORA-2026-6b1bc90ebc · source

sudo dnf upgrade --advisory=FEDORA-2026-6b1bc90ebc

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: hanianis/CVE-2025-63353 (11 stars)
GitHub PoC: r0otk3r/CVE-2025-63353 (4 stars)
GitHub PoC: 0xA1M/CVE-2025-63353 (3 stars)

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-63353?

hg6145f1 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-63353 being exploited?

CVE-2025-63353 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-63353 affect?

CVE-2025-63353 affects hg6145f1 firmware. Severity is critical (CVSS 9.8). A vulnerability in FiberHome GPON ONU HG6145F1 RP4423 allows the device's factory default Wi-Fi password (WPA/WPA2 pre-shared key) to be predicted from the SSID. The device generates default passwords using a deterministic algorithm that de

How urgent is CVE-2025-63353?

Priority 65/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Software pages

Wi-Fi vulnerabilities

References

← Back to latest CVEs