CVE-2026-85222: A vulnerability has been found in D-Link DNS-340L 1.01B04

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CRITICAL 9.1

CVE-2026-85222 is a critical-severity flaw (CVSS 9.1) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability has been found in D-Link DNS-340L 1.01B04. Affected by this vulnerability is an unknown functionality of the file /cgi-bin/addon_center.cgi of the component Add-On Center. Such manipulation of the argument f_name/f_url/f_flag/f_login_user leads to os command injection. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.

Why this priority

Critical severity
CISA SSVC: public proof of concept

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	3.6% (top 11%)
CISA exploited list	No
Weakness	CWE-77, CWE-78
Published	2026-09-03
Last modified	2026-09-04

Publisher (CNA): VulDB

Last updated 2026-09-04 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-09-03 21:17 UTCPublished CVE record published
2026-09-04 14:17 UTCUpdated Record last modified

Exact fixes by distribution

Fedora ELN · fonttools · FIXED · 4.68.0-1.eln159 · FEDORA-2026-37fa4b964c · source

sudo dnf upgrade --advisory=FEDORA-2026-37fa4b964c

Fedora 46 · fonttools · FIXED · 4.68.0-1.fc46 · FEDORA-2026-65d6c01c75 · source

sudo dnf upgrade --advisory=FEDORA-2026-65d6c01c75

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: github.com/dxz0069/WAVLINK-WN530H4-Command-Injection-in-set_add_routing/blob/main/DLINK-CM

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-2026-85222?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-85222 being exploited?

CVE-2026-85222 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-2026-85222 affect?

CVE-2026-85222 affects affected software. Severity is critical (CVSS 9.1). A vulnerability has been found in D-Link DNS-340L 1.01B04. Affected by this vulnerability is an unknown functionality of the file /cgi-bin/addon_center.cgi of the component Add-On Center. Such manipulation of the argument f_name/f_url/f_fla

How urgent is CVE-2026-85222?

Priority 57/100. Critical severity; CISA SSVC: public proof of concept

Software pages

D-Link vulnerabilities

References

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