HOMEVULNERABILITIESCVE-2026-4196
CRITICAL

CVE-2026-4196

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 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 impacts the function cgi_recovery/cgi_backup_now/cgi_set_schedule/cgi_set_rsync_server of the file /cgi-bin/remote_backup.cgi. The manipulation leads to command injection. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used.

NVD Source

Technical Analysis

CVE-2026-4196 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
dns-1550-04 firmwaredns-1550-04dns-315l firmwaredns-315ldns-320 firmwaredns-320dns-320l firmwaredns-320ldns-320lw firmwaredns-320lwdns-321 firmwaredns-321+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_98/98.md
ADVISORYhttps://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_99/99.md
ADVISORYhttps://vuldb.com/?id.351108
ADVISORYhttps://vuldb.com/?submit.769855
ADVISORYhttps://vuldb.com/?submit.769856
ADVISORYhttps://vuldb.com/?submit.769857
ADVISORYhttps://vuldb.com/?submit.769858

All References (9)

→
https://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_98/98.mdExploit · Third Party Advisory
→
https://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_99/99.mdExploit · Third Party Advisory
→
https://vuldb.com/?ctiid.351108Permissions Required · VDB Entry
→
https://vuldb.com/?id.351108Third Party Advisory · VDB Entry
→
https://vuldb.com/?submit.769855Third Party Advisory · VDB Entry
→
https://vuldb.com/?submit.769856Third Party Advisory · VDB Entry
→
https://vuldb.com/?submit.769857Third Party Advisory · VDB Entry
→
https://vuldb.com/?submit.769858Third Party Advisory · VDB Entry
→
https://www.dlink.com/Product

Quick Facts

CVE IDCVE-2026-4196
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-74
CISA KEVNo
EPSS (30d)0.53%
Affected1 vendor
PublishedMar 16, 2026

Related CVEs (CWE-74)

CVE-2026-4223
9.8
CVE-2026-3818
9.8
CVE-2026-2954
9.8
CVE-2026-3708
9.8
CVE-2026-29053
9.8
CVE-2026-3765
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-4196 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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