CVE-2024-4020: A vulnerability was found in Tenda FH1206 1.2.0.8(8155) and classified as critical

This month

HIGH 8.8MITIGATE

CVE-2024-4020 is a high-severity flaw (CVSS 8.8) affecting fh1206 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was found in Tenda FH1206 1.2.0.8(8155) and classified as critical. This issue affects the function fromAddressNat of the file /goform/addressNat. The manipulation of the argument entrys leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-261671. NOTE: The vendor was contacted early about this disclosure

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.6% (top 25%)
CISA exploited list	No
Weakness	CWE-120, CWE-787
Published	2024-04-20
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: tenda

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-04-20 23:15 UTCPublished CVE record published
2026-06-17 08:00 UTCUpdated Record last modified

tenda fh1206 firmware MITIGATE

Affected: 1.2.0.8\(8155\)

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-4020?

fh1206 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-4020 being exploited?

CVE-2024-4020 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-4020 affect?

CVE-2024-4020 affects fh1206 firmware. Severity is high (CVSS 8.8). A vulnerability was found in Tenda FH1206 1.2.0.8(8155) and classified as critical. This issue affects the function fromAddressNat of the file /goform/addressNat. The manipulation of the argument entrys leads to buffer overflow. The attack

How urgent is CVE-2024-4020?

Priority 55/100. High severity; Public exploit reference

Related CVEs

CVE-2024-7707 HIGH 8.8 MITIGATE A vulnerability was found in Tenda FH1206 02.03.01.35 and classified as critical
CVE-2024-7615 HIGH 8.8 MITIGATE A vulnerability was found in Tenda FH1206 1.2.0.8
CVE-2024-7614 HIGH 8.8 MITIGATE A vulnerability was found in Tenda FH1206 1.2.0.8(8155)
CVE-2024-7613 HIGH 8.8 MITIGATE A vulnerability was found in Tenda FH1206 1.2.0.8(8155) and classified as critical
CVE-2024-42987 HIGH 7.5 MITIGATE Tenda FH1206 v02.03.01.35 was discovered to contain a stack-based buffer overflow vulnerability in the fromPpt

References

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