CVE-2016-5673

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-08-25 · updated 2026-06-17
Weakness: CWE-284

Description

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.

Affected products

UltraVNC Repeater: through 1201

References

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

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