How severe is CVE-2019-3915?

CVE-2019-3915 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-3915 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-3915?

CVE-2019-3915 affects Verizon Fios Quantum Gateway G1100 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-3915?

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

When was CVE-2019-3915 published?

CVE-2019-3915 was published on 2019-04-11 and last updated on 2026-06-17.

CVE-2019-3915

CVE-2019-3915 is a high-severity vulnerability in Verizon Fios Quantum Gateway G1100 Firmware with a CVSS 3.x base score of 7.5. 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-294.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.4
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-294
Affected product: Verizon Fios Quantum Gateway G1100 Firmware
Published: 2019-04-11
Last modified: 2026-06-17

Description

Authentication Bypass by Capture-replay vulnerability in Verizon Fios Quantum Gateway (G1100) firmware version 02.01.00.05 allows an unauthenticated attacker with adjacent network access to intercept and replay login requests to gain access to the administrative web interface.

Frequently asked questions

What is CVE-2019-3915?: Authentication Bypass by Capture-replay vulnerability in Verizon Fios Quantum Gateway (G1100) firmware version 02.01.00.05 allows an unauthenticated attacker with adjacent network access to intercept and replay login requests to gain access to the administrative web interface.
How severe is CVE-2019-3915?: CVE-2019-3915 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-3915 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-3915?: CVE-2019-3915 affects Verizon Fios Quantum Gateway G1100 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-3915?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2019-3915 published?: CVE-2019-3915 was published on 2019-04-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:verizon:fios_quantum_gateway_g1100_firmware:02.01.00.05:*:*:*:*:*:*:*

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