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Vulnerability record · CVE-2026-5311 · published 1 April 2026

CVE-2026-5311: Dlink dnr-202l firmware improper access control vulnerability

Dlink · Dnr 202l Firmware

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.

5.5 CVSS 4.0 Medium EPSS 1.3% · top 30.1% CWE-266 · CWE-266CWE-284 · Improper access control
5.5CVSS 4.0 base score, v2 5.0
1.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
20Affected product versions listed by NVD
5References, 1 tagged exploit
17 Jun 2026Last modified by NVD

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.

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:

Affected products

20 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_171/171.md ExploitThird Party Advisory
https://vuldb.com/submit/780441 Third Party AdvisoryVDB Entry
https://vuldb.com/vuln/354640 Third Party AdvisoryVDB Entry
https://vuldb.com/vuln/354640/cti Permissions RequiredVDB Entry
https://www.dlink.com/ Product

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2024-3273D-Link legacy NAS command injection in nas_sharing.cgiAn unauthenticated command injection flaw exists in the HTTP GET request handler of /cgi-bin/nas_sharing.cgi on multiple end-of-life D-Link NAS model…KEVEPSS 100%analysed9.8CVE-2024-3272D-Link NAS Devices Hard-Coded Credentials in nas_sharing.cgiD-Link DNS and DNR series NAS devices contain hard-coded credentials reachable through the HTTP GET handler in /cgi-bin/nas_sharing.cgi, where the 'u…KEVEPSS 98%analysed8.7CVE-2024-7832Dlink dns-120 firmware classic buffer overflow vulnerability** UNSUPPORTED WHEN ASSIGNED ** A vulnerability was found in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, DNR-322L, DNS…EPSS 2.1%8.7CVE-2024-7831Dlink dns-120 firmware classic buffer overflow vulnerability** UNSUPPORTED WHEN ASSIGNED ** A vulnerability has been found in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, DNR-322L…EPSS 1.8%8.7CVE-2024-7830Dlink dns-120 firmware classic buffer overflow vulnerability** UNSUPPORTED WHEN ASSIGNED ** A vulnerability, which was classified as critical, was found in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L…EPSS 1.8%8.7CVE-2024-7829Dlink dns-120 firmware classic buffer overflow vulnerability** UNSUPPORTED WHEN ASSIGNED ** A vulnerability, which was classified as critical, has been found in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS…EPSS 1.8%8.7CVE-2024-7828Dlink dns-120 firmware classic buffer overflow vulnerability** UNSUPPORTED WHEN ASSIGNED ** A vulnerability classified as critical was found in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW,…EPSS 16%7.4CVE-2026-5214Dlink dnr-202l firmware memory buffer overflow vulnerabilityA vulnerability was found 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…EPSS 1.2%

Source: NIST National Vulnerability Database (record CVE-2026-5311), CISA KEV, FIRST EPSS (scores of 2026-10-05). This page is refreshed as NVD updates the record.