CVE-2026-5214

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

HIGH
8.8
CVSS Score
Published: March 31, 2026 at 09:15 PM UTC
Updated: June 17, 2026 at 10:58 AM UTC
21 products affected across 1 vendorDNS-320DNS 340L FirmwareDNS 327L Firmware

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Severity
HIGH8.8
Exploit prediction
EPSS 0.7%
SSVC
PoC

Description

A 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, DNR-326, DNS-340L, DNS-343, DNS-345, DNS-726-4, DNS-1100-4, DNS-1200-05 and DNS-1550-04 up to 20260205. Impacted is the function cgi_addgroup_get_group_quota_minsize of the file /cgi-bin/account_mgr.cgi. The manipulation of the argument Name results in stack-based buffer overflow. The attack may be performed from remote. The exploit has been made public and could 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 ≤ 2026-02-0520260205
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/354349
SignaturePermissions RequiredVDB Entry
Source: cverecord
https://vuldb.com/vuln/354349/cti
Third Party AdvisoryVDB Entry
Source: cverecord
https://vuldb.com/submit/780439
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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