HOMEVULNERABILITIESCVE-2019-17662
CRITICALPOC

CVE-2019-17662

CWE-22Published: October 16, 2019· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

ThinVNC 1.0b1 is vulnerable to arbitrary file read, which leads to a compromise of the VNC server. The vulnerability exists even when authentication is turned on during the deployment of the VNC server. The password for authentication is stored in cleartext in a file that can be read via a ../../ThinVnc.ini directory traversal attack vector.

NVD Source

Technical Analysis

CVE-2019-17662 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.

A proof-of-concept (PoC) exploit exists for CVE-2019-17662. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

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

cybelsoft1 product(s)
thinvnc
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

POC AVAILABLEProof-of-concept code exists
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

ADVISORYhttp://packetstormsecurity.com/files/154896/ThinVNC-1.0b1-Authentication-Bypass.html
ADVISORYhttps://github.com/bewest/thinvnc/issues/5
ADVISORYhttps://redteamzone.com/ThinVNC/
ADVISORYhttp://packetstormsecurity.com/files/154896/ThinVNC-1.0b1-Authentication-Bypass.html
ADVISORYhttps://github.com/bewest/thinvnc/issues/5
ADVISORYhttps://redteamzone.com/ThinVNC/

All References (8)

→
http://packetstormsecurity.com/files/154896/ThinVNC-1.0b1-Authentication-Bypass.htmlExploit · Third Party Advisory · VDB Entry
→
https://github.com/bewest/thinvnc/issues/5Third Party Advisory
→
https://github.com/shashankmangal2/Exploits/blob/master/ThinVNC-RemoteAccess/POC.pyBroken Link
→
https://redteamzone.com/ThinVNC/Exploit · Third Party Advisory
→
http://packetstormsecurity.com/files/154896/ThinVNC-1.0b1-Authentication-Bypass.htmlExploit · Third Party Advisory · VDB Entry
→
https://github.com/bewest/thinvnc/issues/5Third Party Advisory
→
https://github.com/shashankmangal2/Exploits/blob/master/ThinVNC-RemoteAccess/POC.pyBroken Link
→
https://redteamzone.com/ThinVNC/Exploit · Third Party Advisory

Quick Facts

CVE IDCVE-2019-17662
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-22
CISA KEVNo
ExploitPOC
Affected1 vendor(s)
PublishedOct 16, 2019

Related CVEs (CWE-22)

CVE-2011-1566
10.0
CVE-2011-1565
10.0
CVE-2010-4931
10.0
CVE-2012-4705
10.0
CVE-2024-37902
10.0
CVE-2007-4983
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-17662 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.
← All Vulnerabilities·Search for CVE-2019-17662·NVD