CVE-2026-4196Public exploitNetwork attack vector

Authenticated command execution via unsanitized backup name

Published Mar 15, 2026 · Updated Mar 15, 2026

Command injection in D-Link NAS and NVR firmware 20260205 and earlier allows remote authenticated users to execute arbitrary OS commands. remote_backup.cgi passes attacker-controlled name and num values from cgi_recovery, or name from cgi_backup_now, into OS command processing without neutralizing shell metacharacters. A valid administrative web session is required; successful exploitation starts attacker-selected services or executes other commands with appliance privileges.

CVSS severity6.3
Medium
EPSS probability4.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in D-Link NAS and NVR firmware 20260205 and earlier allows remote authenticated users to execute arbitrary OS commands. remote_backup.cgi passes attacker-controlled name and num values from cgi_recovery, or name from cgi_backup_now, into OS command processing without neutralizing shell metacharacters. A valid administrative web session is required; successful exploitation starts attacker-selected services or executes other commands with appliance privileges.

The record

CVE
CVE-2026-4196
Published
Mar 15, 2026
Updated
Mar 15, 2026
Vendor
D-Link
Product
DNR-322L
Classifications
CWE-74, CWE-77, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=20260205

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

D-Link · DNR-322Lversion=20260205
D-Link · DNS-325version=20260205
D-Link · DNS-726-4version=20260205
D-Link · DNS-320Lversion=20260205
D-Link · DNR-202Lversion=20260205
D-Link · DNS-340Lversion=20260205
D-Link · DNS-321version=20260205
D-Link · DNS-1550-04version=20260205
D-Link · DNS-343version=20260205
D-Link · DNS-315Lversion=20260205
D-Link · DNS-323version=20260205
D-Link · DNS-345version=20260205
D-Link · DNR-326version=20260205
D-Link · DNS-327Lversion=20260205
D-Link · DNS-326version=20260205
D-Link · DNS-120version=20260205
D-Link · DNS-320version=20260205
D-Link · DNS-1200-05version=20260205
D-Link · DNS-320LWversion=20260205

Published CVSS scores

6.3VulDB CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
2.1VulDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
6.5VulDB CNAAV:N/AC:L/Au:S/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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