Vulnerability Report

CVE-2016-5673

Title: Ultravnc Repeater

Other

Proof Of Concept

No public PoC currently indexed for CVE-2016-5673.

CWE Category CWE-284

Published Date Aug 25, 2016

Modified Date May 06, 2026

Exploit Status Not Found

Score 7.5 CVSS v3.0

Exploit Probability (EPSS)

1.87%

Vulnerability Summary

CVE-2016-5673: UltraVNC Repeater before 1300 does not restrict destination IP addresses or TCP ports, which allows remote attackers to obtain open-proxy functionality by using a :: substring in between the IP address and port number.

Impacted Vendors

ultravnc 1

Reference Links

http://www.kb.cert.org/vuls/id/735416 http://www.kb.cert.org/vuls/id/BLUU-A9WQVP http://www.securityfocus.com/bid/92348 http://www.kb.cert.org/vuls/id/735416 http://www.kb.cert.org/vuls/id/BLUU-A9WQVP http://www.securityfocus.com/bid/92348

CVSS v3.0

Source Entity [email protected]

Severity HIGH

7.5

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS v2.0

Source Entity [email protected]

Severity MEDIUM

5.0

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:N/AC:L/Au:N/C:N/I:P/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2016-5673 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

May 06, 2026 MODIFIED

Vulnerability data updated via NVD.

April 12, 2025 MODIFIED

Vulnerability data or affected products updated.

August 25, 2016 PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


                                    CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected Stack

No specific products linked.