CVE-2026-5213

D-Link DNS-1550-04 account_mgr.cgi cgi_adduser_to_session stack-based overflow

HIGH
8.8
CVSS Score
Published: March 31, 2026 at 08:15 PM UTC
Updated: July 24, 2026 at 09:20 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 was determined 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. The affected element is the function cgi_adduser_to_session of the file /cgi-bin/account_mgr.cgi. This manipulation of the argument read_list causes stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized.

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 (5)

VDB EntryTechnical DescriptionThird Party Advisory
Source: cverecord
https://vuldb.com/vuln/354350
SignaturePermissions RequiredVDB Entry
Source: cverecord
https://vuldb.com/vuln/354350/cti
Third Party AdvisoryVDB Entry
Source: cverecord
https://vuldb.com/submit/780437
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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