CVE-2026-5312Public exploitNetwork attack vector

Unauthenticated reboot and storage disclosure via CGI

Published Apr 1, 2026 · Updated Apr 1, 2026

Improper access control in D-Link storage appliances 20260205 and earlier allows remote attackers to reboot or read disk status. The dsk_mgr.cgi handler exposes FMT_restart without authentication and returns physical-disk, SMART, volume, RAID, scan, and rebuild data through multiple status actions without checking a session. Network reachability alone is sufficient; a restart interrupts service, while the read-only actions disclose storage layout and operational state.

CVSS severity5.3
Medium
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in D-Link storage appliances 20260205 and earlier allows remote attackers to reboot or read disk status. The dsk_mgr.cgi handler exposes FMT_restart without authentication and returns physical-disk, SMART, volume, RAID, scan, and rebuild data through multiple status actions without checking a session. Network reachability alone is sufficient; a restart interrupts service, while the read-only actions disclose storage layout and operational state.

The record

CVE
CVE-2026-5312
Published
Apr 1, 2026
Updated
Apr 1, 2026
Vendor
D-Link
Product
DNR-322L
Classifications
CWE-266, CWE-284, T1529, T1082
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

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

Exploitability

Present is not the same as exploitable

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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 privilegesunauthenticated

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

5.5VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
5.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
5.0VulDBAV:N/AC:L/Au:N/C:N/I:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-266Incorrect Privilege Assignment
CWE-284Improper Access Control
T1529System Shutdown/Reboot
T1082System Information Discovery

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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