HOMEVULNERABILITIESCVE-2026-4207
CRITICAL

CVE-2026-4207

CWE-74Published: March 16, 2026· Updated: Mar 19, 2026

9.8
CVSS v3.1
EPSS:0.53%probability of exploitation in 30 daysPercentile:67.0th

Official 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. This impacts the function cgi_device/cgi_sms_test/cgi_firmware_upload/cgi_ntp_time of the file /cgi-bin/system_mgr.cgi. Executing a manipulation can lead to command injection. The attack may be performed from remote. The exploit has been publicly disclosed and may be utilized.

NVD Source

Technical Analysis

CVE-2026-4207 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

dlink40 products
dnr-202l firmwarednr-202ldnr-326 firmwarednr-326dns-1100-4 firmwaredns-1100-4dns-120 firmwaredns-120dns-1200-05 firmwaredns-1200-05dns-1550-04 firmwaredns-1550-04+28 more
Source: NVD CPE · 40 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_141/141.md
ADVISORYhttps://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_142/142.md
ADVISORYhttps://vuldb.com/?id.351119
ADVISORYhttps://vuldb.com/?submit.770420
ADVISORYhttps://vuldb.com/?submit.770422
ADVISORYhttps://vuldb.com/?submit.770423
ADVISORYhttps://vuldb.com/?submit.770425

All References (9)

→
https://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_141/141.mdExploit · Third Party Advisory
→
https://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_142/142.mdExploit · Third Party Advisory
→
https://vuldb.com/?ctiid.351119Permissions Required · VDB Entry
→
https://vuldb.com/?id.351119Third Party Advisory · VDB Entry
→
https://vuldb.com/?submit.770420Third Party Advisory · VDB Entry
→
https://vuldb.com/?submit.770422Third Party Advisory · VDB Entry
→
https://vuldb.com/?submit.770423Third Party Advisory · VDB Entry
→
https://vuldb.com/?submit.770425Third Party Advisory · VDB Entry
→
https://www.dlink.com/Product

Quick Facts

CVE IDCVE-2026-4207
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-74
CISA KEVNo
EPSS (30d)0.53%
Affected1 vendor
PublishedMar 16, 2026

Related CVEs (CWE-74)

CVE-2026-4471
9.8
CVE-2026-3134
9.8
CVE-2026-4473
9.8
CVE-2026-4472
9.8
CVE-2026-3153
9.8
CVE-2026-4205
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-4207 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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