CVE-2026-2911: A vulnerability has been found in Tenda FH451 up to 1.0.0.9

This month

HIGH 8.8MITIGATE

CVE-2026-2911 is a high-severity flaw (CVSS 8.8) affecting fh451 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability has been found in Tenda FH451 up to 1.0.0.9. This issue affects some unknown processing of the file /goform/GstDhcpSetSer. The manipulation leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	3.5% (top 11%)
CISA exploited list	No
Weakness	CWE-119, CWE-120
Published	2026-02-22
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

2026-02-22 04:15 UTCPublished CVE record published
2026-06-17 10:32 UTCUpdated Record last modified

tenda fh451 firmware MITIGATE

Affected: 1.0.0.9

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.0.9

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.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · hatch · FIXED · 1.18.2-1.fc46 · FEDORA-2026-910cec418b · source

sudo dnf upgrade --advisory=FEDORA-2026-910cec418b

Fedora ELN · python-configargparse · FIXED · 1.9.0-1.eln159 · FEDORA-2026-b327ce4965 · source

sudo dnf upgrade --advisory=FEDORA-2026-b327ce4965

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: vuln.ricky.place/Tenda/FH451/

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-2026-2911?

fh451 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-2911 being exploited?

CVE-2026-2911 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-2026-2911 affect?

CVE-2026-2911 affects fh451 firmware. Severity is high (CVSS 8.8). A vulnerability has been found in Tenda FH451 up to 1.0.0.9. This issue affects some unknown processing of the file /goform/GstDhcpSetSer. The manipulation leads to buffer overflow. It is possible to initiate the attack remotely. The exploi

How urgent is CVE-2026-2911?

Priority 58/100. High severity; Public exploit reference

Related CVEs

CVE-2026-4535 HIGH 8.8 MITIGATE A vulnerability has been found in Tenda FH451 1.0.0.9
CVE-2026-4534 HIGH 8.8 MITIGATE A flaw has been found in Tenda FH451 1.0.0.9
CVE-2026-3678 HIGH 8.8 MITIGATE A vulnerability was determined in Tenda FH451 1.0.0.9
CVE-2026-3677 HIGH 8.8 MITIGATE A vulnerability was found in Tenda FH451 1.0.0.9
CVE-2025-7807 HIGH 8.8 MITIGATE A vulnerability, which was classified as critical, has been found in Tenda FH451 1.0.0.9

References

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