How severe is CVE-2020-24376?

CVE-2020-24376 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-24376 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-24376?

CVE-2020-24376 primarily affects Free Freebox Revolution Firmware. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-24376?

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.

When was CVE-2020-24376 published?

CVE-2020-24376 was published on 2020-09-16 and last updated on 2026-06-17.

CVE-2020-24376

CVE-2020-24376 is a critical-severity vulnerability in Free Freebox Revolution Firmware with a CVSS 3.x base score of 9.6. 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-20.

Key facts

Severity: Critical (CVSS 3.x base score 9.6)
CVSS v2: 6.8
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Free Freebox Revolution Firmware
Published: 2020-09-16
Last modified: 2026-06-17

Description

A DNS rebinding vulnerability in the UPnP IGD implementations in Freebox v5 before 1.5.29 and Freebox Server before 4.2.3.

Frequently asked questions

What is CVE-2020-24376?: A DNS rebinding vulnerability in the UPnP IGD implementations in Freebox v5 before 1.5.29 and Freebox Server before 4.2.3.
How severe is CVE-2020-24376?: CVE-2020-24376 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-24376 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-24376?: CVE-2020-24376 primarily affects Free Freebox Revolution Firmware. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-24376?: 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.
When was CVE-2020-24376 published?: CVE-2020-24376 was published on 2020-09-16 and last updated on 2026-06-17.

References

Affected products (5)

cpe:2.3:o:free:freebox_revolution_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:free:freebox_mini_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:free:freebox_one_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:free:freebox_delta_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:free:freebox_pop_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Free Freebox Revolution Firmware

CVE-2020-24377 — Critical (CVSS 9.6): A DNS rebinding vulnerability in the Freebox OS web interface in Freebox Server before 4.2.3.
CVE-2020-24373 — High (CVSS 8.8): A CSRF vulnerability in the UPnP MediaServer implementation in Freebox Server before 4.2.3.

All CVEs affecting Free Freebox Revolution Firmware →

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