CVE-2019-8259: Siemens Sinumerik Access mymachine/p2p

High severity, CVSS 7.5. EPSS: 3% chance of exploitation in the next 30 days.

UltraVNC revision 1198 contains multiple memory leaks (CWE-655) in VNC client code, which allow an attacker to read stack memory and can be abused for information disclosure. Combined with another vulnerability, it can be used to leak stack memory and bypass ASLR. This attack appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1199.

Affected products

• Siemens Sinumerik Access mymachine/p2p: before 4.8 (fixed in 4.8)
• Siemens Sinumerik Pcu Base WIN10 Software/ipc: before 14.00 (fixed in 14.00)
• Siemens Sinumerik Pcu Base WIN7 Software/ipc: up to and including 12.01
• Uvnc Ultravnc: before 1.2.2.3 (fixed in 1.2.2.3)

Published 2019-03-05. Last modified 2026-06-17.