How severe is CVE-2025-63353?

CVE-2025-63353 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-63353 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-63353?

CVE-2025-63353 affects Fiberhome Hg6145f1 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-63353?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-63353 have an EU (EUVD) identifier?

Yes. CVE-2025-63353 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-131925.

When was CVE-2025-63353 published?

CVE-2025-63353 was published on 2025-11-12 and last updated on 2026-06-17.

CVE-2025-63353

CVE-2025-63353 is a critical-severity vulnerability in Fiberhome Hg6145f1 Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-284.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-131925
Weakness: CWE-284
Affected product: Fiberhome Hg6145f1 Firmware
Published: 2025-11-12
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2025-63353?: 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.
How severe is CVE-2025-63353?: CVE-2025-63353 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-63353 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-63353?: CVE-2025-63353 affects Fiberhome Hg6145f1 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-63353?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-63353 have an EU (EUVD) identifier?: Yes. CVE-2025-63353 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-131925.
When was CVE-2025-63353 published?: CVE-2025-63353 was published on 2025-11-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:fiberhome:hg6145f1_firmware:rp4423:*:*:*:*:*:*:*

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