CRITICAL
CVE-2019-8950
CWE-798Published: February 20, 2019· Updated: Jun 17, 2026
9.8
CVSS v3.1
Official Description
The backdoor account dnsekakf2$$ in /bin/login on DASAN H665 devices with firmware 1.46p1-0028 allows an attacker to login to the admin account via TELNET.
Technical Analysis
CVE-2019-8950 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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Vendors & Products
dasannetworks2 product(s)
h665 firmwareh665
Source: NVD CPE · 2 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
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Official Patches & Advisories
All References (4)
→
https://blog.burghardt.pl/2019/02/dasan-h665-has-vendor-backdoor-built-into-busyboxs-bin-login/Exploit · Third Party Advisory
→
https://seclists.org/bugtraq/2019/Feb/32Exploit · Mailing List · Third Party Advisory
→
https://blog.burghardt.pl/2019/02/dasan-h665-has-vendor-backdoor-built-into-busyboxs-bin-login/Exploit · Third Party Advisory
→
https://seclists.org/bugtraq/2019/Feb/32Exploit · Mailing List · Third Party Advisory
Quick Facts
CVE IDCVE-2019-8950
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-798
CISA KEVNo
Affected1 vendor(s)
PublishedFeb 20, 2019
Related CVEs (CWE-798)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2019-8950 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. CVE data is provided under the NVD usage policy.