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CVE-2024-4020

25
FAUCET Score

CVE-2024-4020 is a critical buffer overflow vulnerability affecting Tenda FH1206 firmware version 1.2.0.8(8155). This flaw, located in the fromAddressNat function within the /goform/addressNat file, can be triggered by manipulating the 'entrys' argument. With a CVSS score of 8.8 (High), it allows for remote attacks with low privileges, potentially leading to high impact on confidentiality, integrity, and availability. While exploit code has been publicly disclosed, there is currently no evidence of active exploitation, and community discussion and media coverage are minimal. The vendor did not respond to early disclosure attempts.

Impacted Technologies

VendorProductVersion(s)CPE
1.2.0.8\(8155\)CPE matchmatch criteria
cpe:2.3:o:tenda:fh1206_firmware:1.2.0.8\(8155\):*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.57%
Probability of exploitation in next 30 days
EPSS Percentile
72.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0158 is in the 71st percentile among its peer group of 17,844 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Remediation records are not available for this CVE.

References

palm-vertebra-fe9.notion.site / fromAddressNat_entrys-b04d5356e5f04e30b37cb9037b94e1b2
ExploitThird Party Advisory
vuldb.com
Permissions RequiredVDB Entry
vuldb.com
Permissions RequiredVDB Entry
vuldb.com
Third Party AdvisoryVDB Entry