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CVE-2020-24377

30
FAUCET Score

CVE-2020-24377 is a critical DNS rebinding vulnerability affecting the Freebox OS web interface in Freebox Server versions prior to 4.2.3, impacting various Freebox models. With a CVSS score of 9.6, this vulnerability is easily exploitable over the network with low attack complexity, allowing an attacker to achieve high confidentiality, integrity, and availability impacts. While there is no evidence of active exploitation, nor publicly available exploit code in Metasploit, Nuclei, or ExploitDB, the vulnerability has garnered significant community discussion with 10 mentions.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.2.3CPE matchmatch criteria
cpe:2.3:o:free:freebox_revolution_firmware:*:*:*:*:*:*:*:*
< 4.2.3CPE matchmatch criteria
cpe:2.3:o:free:freebox_mini_firmware:*:*:*:*:*:*:*:*
< 4.2.3CPE matchmatch criteria
cpe:2.3:o:free:freebox_one_firmware:*:*:*:*:*:*:*:*
< 4.2.3CPE matchmatch criteria
cpe:2.3:o:free:freebox_delta_firmware:*:*:*:*:*:*:*:*
< 4.2.3CPE matchmatch criteria
cpe:2.3:o:free:freebox_pop_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.6CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.19%
Probability of exploitation in next 30 days
EPSS Percentile
64.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0119 is in the 72nd percentile among its peer group of 834 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.8 Bluesky, 0.5 Mastodon, and 1.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

dev.freebox.fr / blog
Vendor Advisory
gabriel.urdhr.fr / 2020/09/23/dns-rebinding-freebox
ExploitThird Party Advisory