HOMEVULNERABILITIESCVE-2026-5311
MEDIUM

CVE-2026-5311

CWE-266Published: April 1, 2026· Updated: Apr 7, 2026

5.3
CVSS v3.1
EPSS:0.05%probability of exploitation in 30 daysPercentile:17.3th

Official Description

A security flaw has been discovered in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, DNR-322L, DNS-323, DNS-325, DNS-326, DNS-327L, DNR-326, DNS-340L, DNS-343, DNS-345, DNS-726-4, DNS-1100-4, DNS-1200-05 and DNS-1550-04 up to 20260205. Affected is the function Webdav_Access_List of the file /cgi-bin/file_center.cgi. Performing a manipulation of the argument cmd results in improper access controls. It is possible to initiate the attack remotely. The exploit has been released to the public and may be used for attacks.

NVD Source

Technical Analysis

CVE-2026-5311 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected Vendors & Products

dlink40 products
dnr-202l firmwarednr-202ldnr-326 firmwarednr-326dns-1100-4 firmwaredns-1100-4dns-120 firmwaredns-120dns-1200-05 firmwaredns-1200-05dns-1550-04 firmwaredns-1550-04+28 more
Source: NVD CPE · 40 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_171/171.md
ADVISORYhttps://vuldb.com/submit/780441
ADVISORYhttps://vuldb.com/vuln/354640

All References (5)

→
https://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_171/171.mdExploit · Third Party Advisory
→
https://vuldb.com/submit/780441Third Party Advisory · VDB Entry
→
https://vuldb.com/vuln/354640Third Party Advisory · VDB Entry
→
https://vuldb.com/vuln/354640/ctiPermissions Required · VDB Entry
→
https://www.dlink.com/Product

Quick Facts

CVE IDCVE-2026-5311
CVSS Score5.3 / 10
SeverityMEDIUM
WeaknessCWE-266
CISA KEVNo
EPSS (30d)0.05%
Affected1 vendor
PublishedApr 1, 2026

Related CVEs (CWE-266)

CVE-2026-42368
9.9
CVE-2026-32922
9.9
CVE-2026-32520
9.8
CVE-2026-33518
9.8
CVE-2026-32916
9.8
CVE-2026-33519
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-5311 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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