CVE-2026-5212

D-Link DNS-1550-04 webdav_mgr.cgi Webdav_Upload_File stack-based overflow

HIGH
8.8
CVSS Score
Published: March 31, 2026 at 08:15 PM UTC
Updated: July 24, 2026 at 08:20 PM UTC
41 products affected across 1 vendorDNS 340L FirmwareDNS 327L FirmwareDNS 345 Firmware

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Severity
HIGH8.8
Exploit prediction
EPSS 0.7%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ 2026-02-0520260205
dlink-dnr-202l (same device)
v ≤ 2026-02-0520260205
dlink-dnr-326 (same device)
v ≤ 2026-02-0520260205
dlink-dns-1100-4 (same device)
v ≤ 2026-02-0520260205
dlink-dns-120 (same device)
v ≤ 2026-02-0520260205
dlink-dns-1200-05 (same device)
v ≤ 2026-02-0520260205
dlink-dns-1550-04 (same device)
v ≤ 2026-02-0520260205
dlink-dns-315l (same device)
v ≤ 2026-02-05
v ≤ 2026-02-0520260205
dlink-dns-320l (same device)
v ≤ 2026-02-0520260205
dlink-dns-320lw (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (6)

VDB EntryTechnical DescriptionThird Party Advisory
Source: cverecord
https://vuldb.com/vuln/354348
SignaturePermissions RequiredVDB Entry
Source: cverecord
https://vuldb.com/vuln/354348/cti
Third Party AdvisoryVDB Entry
Source: cverecord
https://vuldb.com/submit/780435
Third Party AdvisoryVDB Entry
Source: cverecord
https://vuldb.com/submit/780436
Product
Source: cverecord
https://www.dlink.com/

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHVulDB
Vector?

Quick Info

StatusANALYZED
CWE
CWE-121CWE-119CWE-787

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