What is CVE-2026-5311?

CVE-2026-5311 is a medium-severity vulnerability in D-Link Dnr-202l, classified under Incorrect Privilege Assignment. CVSS score: 5.3/10. Published 2026-04-01.

How severe is CVE-2026-5311?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Privilege escalation in D-Link Dnr-202l

CVE-2026-5311

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.

Published 2026-04-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.013 (69.8th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 69.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.013 · change: +0.003

Affected products

D-Link Dnr-202l — versions 20260205
D-Link Dnr-322l — versions 20260205
D-Link Dnr-326 — versions 20260205
D-Link Dns-1100-4 — versions 20260205
D-Link Dns-120 — versions 20260205
D-Link Dns-1200-05 — versions 20260205
D-Link Dns-1550-04 — versions 20260205
D-Link Dns-315l — versions 20260205
D-Link Dns-320 — versions 20260205
D-Link Dns-320l — versions 20260205

Weakness classification (CWE)

References

vuldb.com/vuln/354640 (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
vuldb.com/vuln/354640/cti (signature, Permissions Required, permissions-required, VDB Entry)
vuldb.com/submit/780441 (VDB Entry, Third Party Advisory, third-party-advisory)
github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_171/171.md (Exploit, Third Party Advisory, exploit)
www.dlink.com/ (Product, product)

Frequently asked questions

What is CVE-2026-5311?: CVE-2026-5311 is a medium-severity vulnerability in D-Link Dnr-202l, classified under Incorrect Privilege Assignment. CVSS score: 5.3/10. Published 2026-04-01.
How severe is CVE-2026-5311?: Medium severity. CVSS v3 base score is 5.3 out of 10.