CVE-2026-5311

Name: CVE-2026-5311
Creator: NVD / NIST
Published: 2026-04-01T20:16:29.95+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.99%

Last modified Jun 17, 2026

CVE-2026-5311 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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. EPSS estimates a 0.99% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS 4.0

5.5/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.99%

58.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Dlink	Dnr-202l Firmware	<= 2026-02-05
Dlink	Dnr-326 Firmware	<= 2026-02-05
Dlink	Dns-1100-4 Firmware	<= 2026-02-05
Dlink	Dns-120 Firmware	<= 2026-02-05
Dlink	Dns-1200-05 Firmware	<= 2026-02-05
Dlink	Dns-1550-04 Firmware	<= 2026-02-05
Dlink	Dns-315l Firmware	<= 2026-02-05
Dlink	Dns-320 Firmware	<= 2026-02-05
Dlink	Dns-320l Firmware	<= 2026-02-05
Dlink	Dns-320lw Firmware	<= 2026-02-05
Dlink	Dns-321 Firmware	<= 2026-02-05
Dlink	Dns-322l Firmware	<= 2026-02-05
Dlink	Dns-323 Firmware	<= 2026-02-05
Dlink	Dns-325 Firmware	<= 2026-02-05
Dlink	Dns-326 Firmware	<= 2026-02-05
Dlink	Dns-327l Firmware	<= 2026-02-05
Dlink	Dns-340l Firmware	<= 2026-02-05
Dlink	Dns-343 Firmware	<= 2026-02-05
Dlink	Dns-345 Firmware	<= 2026-02-05
Dlink	Dns-726-4 Firmware	<= 2026-02-05

References

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

Timeline

Published: Apr 1, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-5311?

How severe is CVE-2026-5311?

CVE-2026-5311 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.99% probability of exploitation in the next 30 days.

How do I fix CVE-2026-5311?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-5311?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST