CVE-2024-3273Known exploitationPublic exploitNetwork attack vector

Unauthenticated command execution via encoded system parameter

Published Apr 4, 2024 · Updated Oct 21, 2025

Command injection in nas_sharing.cgi on D-Link DNS-320L, DNS-325, DNS-327L, and DNS-340L allows remote attackers to execute commands. The CGI handler accepts a Base64-encoded command in the system query parameter and executes the decoded text without neutralizing command elements. A crafted HTTP GET request requires no authentication and can read or alter stored data, change device configuration, or interrupt NAS service.

CVSS severity9.8
Critical
EPSS probability100.00%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in nas_sharing.cgi on D-Link DNS-320L, DNS-325, DNS-327L, and DNS-340L allows remote attackers to execute commands. The CGI handler accepts a Base64-encoded command in the system query parameter and executes the decoded text without neutralizing command elements. A crafted HTTP GET request requires no authentication and can read or alter stored data, change device configuration, or interrupt NAS service.

The record

CVE
CVE-2024-3273
Published
Apr 4, 2024
Updated
Oct 21, 2025
Vendor
D-Link
Product
DNS-325
Classifications
CWE-77, T1190, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 4, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 11, 2024Exploitation reportedCISA Known Exploited Vulnerabilities Catalog entry
  3. Oct 21, 2025Record 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=20240403

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

D-Link · DNS-325version=20240403
D-Link · DNS-320Lversion=20240403
D-Link · DNS-340Lversion=20240403
D-Link · DNS-327Lversion=20240403

Published CVSS scores

9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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 IPsShadowserver observations through Sep 16, 2026. Gaps indicate unavailable data.
Sep 10, 2026Sep 16, 2026
View daily counts
Reporting dayUnique IPs
Sep 10, 20267
Sep 11, 20261
Sep 12, 20261
Sep 13, 2026Unavailable
Sep 14, 20261
Sep 15, 20261
Sep 16, 20264
Latest reporting daySep 16, 2026
Latest daily unique IPs4
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1190Exploit Public-Facing Application
T1059Command and Scripting Interpreter

Public exploit references

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

Reported exploitation

Technologies

Your stack

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Your stack

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