Ultravnc vulnerabilitiesNone on the known-exploited list.
Ultravnc has 7 published vulnerabilities across 4 products in our catalogue. None of them is on the list of flaws known to be exploited today. The most affected product is Ultravnc, with 5. If you run Ultravnc software, patch the exploited flaws first.
We keep watching the known-exploited list.
Which Ultravnc products have the most vulnerabilities?
Ultravnc leads with 5 published vulnerabilities. Open a product to see its versions and which of its flaws criminals are already using.
Which Ultravnc vulnerabilities are being exploited?
This is the list that matters most: flaws criminals are using now.
None of Ultravnc's published vulnerabilities is on the list of flaws known to be exploited today. We keep watching that list.
Which Ultravnc flaws are most likely to be used?
Ranked by the latest exploit-likelihood forecast: the chance each flaw is used in an attack in the next 30 days. A high severity score on its own doesn't tell you that. Flaws shared by many other makers' products are left out.
- 68%CVE-2006-1652Critical
Multiple buffer overflows in (a) UltraVNC (aka Ultr@VNC) 1.0.1 and earlier and (b) tabbed_viewer 1.29 (1) allow user-assisted remote attackers to execute arbitrary code via a malicious server that sends a long string...
- 39%CVE-2008-0610Critical
Stack-based buffer overflow in the ClientConnection::NegotiateProtocolVersion function in vncviewer/ClientConnection.cpp in vncviewer for UltraVNC 1.0.2 and 1.0.4 before 01252008, when in LISTENING mode or when using...
- 13%CVE-2009-0388Critical
Multiple integer signedness errors in (1) UltraVNC 1.0.2 and 1.0.5 and (2) TightVnc 1.3.9 allow remote VNC servers to cause a denial of service (heap corruption and application crash) or possibly execute arbitrary...
- 5.6%CVE-2008-5001Critical
Multiple stack-based buffer overflows in multiple functions in vncviewer/FileTransfer.cpp in vncviewer for UltraVNC 1.0.2 and 1.0.4 before 01252008, when in LISTENING mode or when using the DSM plugin, allow remote...
- 2.1%CVE-2006-2206Critical
The MS-Logon authentication scheme in UltraVNC (aka Ultr@VNC) 1.0.1 uses weak encryption (XOR) for challenge/response, which allows remote attackers to gain privileges by sniffing and decrypting passwords.
- 1.9%CVE-2016-5673High
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.
- 0.4%CVE-2010-5248Medium
Untrusted search path vulnerability in UltraVNC 1.0.8.2 allows local users to gain privileges via a Trojan horse vnclang.dll file in the current working directory, as demonstrated by a directory that contains a .vnc file.
All Ultravnc products we track.
4 products, most vulnerabilities first. Find the ones you run, then open a product to see its versions and exploited flaws.
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1 new flaw affects software Acme tracks
Multiple buffer overflows in (a) UltraVNC (aka Ultr@VNC) 1.0.1 and earlier and (b) tabbed_viewer 1.29 (1) allow user-assisted remote attackers to execute arbitrary code via a malicious server that sends a long string to a client that connects on TCP port 5900, which triggers an overflow in Log::ReallyPrint; and (2) allow remote attackers to cause a denial of service (server crash) via a long HTTP GET request to TCP port 5800, which triggers an overflow in VNCLog::ReallyPrint.
- Matched to
- Ultravnc on Acme's software list
- What to do
- Plan in the vendor’s update
Sent to the alert recipients Acme chose. Also in the app and to Acme's webhook.
Our catalogue lists 7 published vulnerabilities across 4 products and 12 versions from Ultravnc.
None of Ultravnc's vulnerabilities is on the list of flaws known to be exploited today.
Ultravnc, with 5 published vulnerabilities. Its own page lists the ones known to be exploited.
Create a Precursor Intelligence account and track the Ultravnc products you run. We match them against every published flaw, give each one a risk score from 0 to 100 and tell you as soon as we spot one that affects you, by email, in the app or by webhook.