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CVE-2026-5212

HIGHCVSS 7.4/10EPSS 0.74%

Last modified

CVE-2026-5212 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. A vulnerability has been 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, DNR-326, DNS-340L, DNS-343, DNS-345, DNS-726-4, DNS-1100-4, DNS-1200-05 and DNS-1550-04 up to 20260205. This issue affects the function Webdav_Upload_File of the file /cgi-bin/webdav_mgr.cgi. EPSS estimates a 0.74% chance of exploitation in the next 30 days.

Description

A vulnerability has been 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, DNR-326, DNS-340L, DNS-343, DNS-345, DNS-726-4, DNS-1100-4, DNS-1200-05 and DNS-1550-04 up to 20260205. This issue affects the function Webdav_Upload_File of the file /cgi-bin/webdav_mgr.cgi. The manipulation of the argument f_file leads to stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used.

Metrics

CVSS 3.1
8.8/10

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

CVSS 4.0
7.4/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/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
0.74%

49.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
DlinkDnr-202l Firmware<= 2026-02-05
DlinkDnr-326 Firmware<= 2026-02-05
DlinkDns-1100-4 Firmware<= 2026-02-05
DlinkDns-120 Firmware<= 2026-02-05
DlinkDns-1200-05 Firmware<= 2026-02-05
DlinkDns-1550-04 Firmware<= 2026-02-05
DlinkDns-315l Firmware<= 2026-02-05
DlinkDns-320 Firmware<= 2026-02-05
DlinkDns-320l Firmware<= 2026-02-05
DlinkDns-320lw Firmware<= 2026-02-05
DlinkDns-321 Firmware<= 2026-02-05
DlinkDns-322l Firmware<= 2026-02-05
DlinkDns-323 Firmware<= 2026-02-05
DlinkDns-325 Firmware<= 2026-02-05
DlinkDns-326 Firmware<= 2026-02-05
DlinkDns-327l Firmware<= 2026-02-05
DlinkDns-340l Firmware<= 2026-02-05
DlinkDns-343 Firmware<= 2026-02-05
DlinkDns-345 Firmware<= 2026-02-05
DlinkDns-726-4 Firmware<= 2026-02-05

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2026-5212?
A vulnerability has been 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, DNR-326, DNS-340L, DNS-343, DNS-345, DNS-726-4, DNS-1100-4, DNS-1200-05 and DNS-1550-04 up to 20260205. This issue affects the function Webdav_Upload_File of the file /cgi-bin/webdav_mgr.cgi. The manipulation of the argument f_file leads to stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used.
How severe is CVE-2026-5212?
CVE-2026-5212 has a CVSS score of 7.4/10 (HIGH severity). The EPSS model estimates a 0.74% probability of exploitation in the next 30 days.
How do I fix CVE-2026-5212?
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-2026-5212?

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

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Source: NVD / NIST