Uvnc Ultravnc vulnerabilities

• uvnc ultravnc UltraVNC repeater HTTP server global buffer overflow via long URI (pre-auth RCE) CVE-2026-7840 9.3 CriticalJuly 1, 2026
• uvnc ultravnc UltraVNC repeater ships hardcoded default admin password allowing unauthenticated admin access CVE-2026-7839 9.1 CriticalJuly 1, 2026
• uvnc ultravnc UltraVNC viewer heap buffer overflow via integer overflow in RFB connection-failure reason length CVE-2026-7838 8.7 HighJuly 1, 2026
• uvnc ultravnc UltraVNC viewer off-by-one stack overflow in ServerInit desktop name parsing CVE-2026-7831 7.5 HighJuly 1, 2026
• uvnc ultravnc UltraVNC MS-Logon II uses 64-bit Diffie-Hellman and seeded libc rand() enabling credential interception CVE-2026-7830 7.4 HighJuly 1, 2026
• uvnc ultravnc UltraVNC repeater authenticated out-of-bounds write in rule parser via oversized token CVE-2026-7829 7.2 HighJuly 1, 2026
• uvnc ultravnc UltraVNC repeater integer overflow in win_log malloc leading to heap overflow CVE-2026-7828 5.3 MediumJuly 1, 2026
• uvnc ultravnc UltraVNC vncauth.c uses time-seeded libc rand() to generate VNC authentication challenge bytes CVE-2026-44040 4.8 MediumJuly 1, 2026
• uvnc ultravnc UltraVNC vncWc2Mb calls wcslen() before validating that the wide string is NUL-terminated CVE-2026-44041 4.3 MediumJuly 1, 2026
• uvnc ultravnc UltraVNC repeater wi_uudecode off-by-one in base64 decode boundary check CVE-2026-44042 3.7 LowJuly 1, 2026
• uvnc ultravnc UltraVNC Service version.dll uncontrolled search path CVE-2026-4962 7.3 HighMarch 27, 2026
• uvnc ultravnc launcher UltraVNC Launcher 1.2.2.4 Denial of Service Buffer Overflow CVE-2019-25601 6.9 MediumMarch 22, 2026
• uvnc ultravnc viewer UltraVNC Viewer 1.2.2.4 Denial of Service via Buffer Overflow CVE-2019-25600 7.1 HighMarch 22, 2026
• uvnc ultravnc UltraVNC Windows Service cryptbase.dll uncontrolled search path CVE-2026-3787 7.3 HighMarch 8, 2026
• ultravnc team viewer, uvnc ultravnc viewer +1 more UltraVNC Viewer 1.2.4.0 - 'VNCServer' Denial of Service CVE-2020-37134 4.6 MediumFebruary 5, 2026
• ultravnc team launcher, uvnc ultravnc, ultravnc launcher +2 more UltraVNC Launcher 1.2.4.0 - 'RepeaterHost' Denial of Service CVE-2020-37133 6.7 MediumFebruary 5, 2026
• ultravnc team launcher, uvnc ultravnc, ultravnc launcher +2 more UltraVNC Launcher 1.2.4.0 - 'Password' Denial of Service CVE-2020-37132 6.7 MediumFebruary 5, 2026
• ultravnc Low privilege user is able to exploit the service and gain SYSTEM privileges in UltraVNC server CVE-2022-24750 8.8 HighMarch 10, 2022
• kaspersky lab ultravnc UltraVNC revision 1203 has out-of-bounds access vulnerability in VNC client inside RAW decoder,... CVE-2019-8280 9.8 CriticalMarch 8, 2019
• kaspersky lab ultravnc, siemens sinumerik access mymachine\/p2p, sinumerik pcu base win10 software\/ipc +1 more +3 more UltraVNC revision 1211 contains multiple memory leaks (CWE-665) in VNC server code, which allows... CVE-2019-8277 7.5 HighMarch 8, 2019
• kaspersky lab ultravnc, siemens sinumerik access mymachine\/p2p, sinumerik pcu base win10 software\/ipc +1 more +3 more UltraVNC revision 1211 has a stack buffer overflow vulnerability in VNC server code inside file... CVE-2019-8276 7.5 HighMarch 8, 2019
• kaspersky lab ultravnc, siemens sinumerik access mymachine\/p2p, sinumerik pcu base win10 software\/ipc +1 more +3 more UltraVNC revision 1211 has multiple improper null termination vulnerabilities in VNC server code,... CVE-2019-8275 9.8 CriticalMarch 8, 2019
• kaspersky lab ultravnc, siemens sinumerik access mymachine\/p2p, sinumerik pcu base win10 software\/ipc +1 more +3 more UltraVNC revision 1211 has a heap buffer overflow vulnerability in VNC server code inside file... CVE-2019-8274 9.8 CriticalMarch 8, 2019
• kaspersky lab ultravnc, siemens sinumerik access mymachine\/p2p, sinumerik pcu base win10 software\/ipc +1 more +3 more UltraVNC revision 1211 has a heap buffer overflow vulnerability in VNC server code inside file... CVE-2019-8273 9.8 CriticalMarch 8, 2019
• kaspersky lab ultravnc, siemens sinumerik access mymachine\/p2p, sinumerik pcu base win10 software\/ipc +1 more +3 more UltraVNC revision 1211 has multiple off-by-one vulnerabilities in VNC server code, which can... CVE-2019-8272 9.8 CriticalMarch 8, 2019
• kaspersky lab ultravnc, siemens sinumerik access mymachine\/p2p, sinumerik pcu base win10 software\/ipc +1 more +3 more UltraVNC revision 1211 has a heap buffer overflow vulnerability in VNC server code inside file... CVE-2019-8271 9.8 CriticalMarch 8, 2019
• kaspersky lab ultravnc UltraVNC revision 1210 has out-of-bounds read vulnerability in VNC client code inside Ultra... CVE-2019-8270 7.5 HighMarch 8, 2019
• kaspersky lab ultravnc, siemens sinumerik access mymachine\/p2p, sinumerik pcu base win10 software\/ipc +1 more +3 more UltraVNC revision 1206 has stack-based Buffer overflow vulnerability in VNC client code inside... CVE-2019-8269 7.5 HighMarch 8, 2019
• kaspersky lab ultravnc, siemens sinumerik access mymachine\/p2p, sinumerik pcu base win10 software\/ipc +1 more +3 more UltraVNC revision 1206 has multiple off-by-one vulnerabilities in VNC client code connected with... CVE-2019-8268 9.8 CriticalMarch 8, 2019
• kaspersky lab ultravnc UltraVNC revision 1207 has out-of-bounds read vulnerability in VNC client code inside TextChat... CVE-2019-8267 7.5 HighMarch 8, 2019
• kaspersky lab ultravnc UltraVNC revision 1207 has multiple out-of-bounds access vulnerabilities connected with improper... CVE-2019-8266 9.8 CriticalMarch 8, 2019
• kaspersky lab ultravnc UltraVNC revision 1207 has multiple out-of-bounds access vulnerabilities connected with improper... CVE-2019-8265 9.8 CriticalMarch 8, 2019
• kaspersky lab ultravnc UltraVNC revision 1203 has out-of-bounds access vulnerability in VNC client inside Ultra2 decoder... CVE-2019-8264 9.8 CriticalMarch 8, 2019
• kaspersky lab ultravnc, siemens sinumerik access mymachine\/p2p, sinumerik pcu base win10 software\/ipc +1 more +3 more UltraVNC revision 1205 has stack-based buffer overflow vulnerability in VNC client code inside... CVE-2019-8263 6.5 MediumMarch 5, 2019
• ultravnc, siemens sinumerik access mymachine\/p2p, sinumerik pcu base win10 software\/ipc +1 more +3 more UltraVNC revision 1203 has multiple heap buffer overflow vulnerabilities in VNC client code... CVE-2019-8262 9.8 CriticalMarch 5, 2019
• ultravnc UltraVNC revision 1199 has a out-of-bounds read vulnerability in VNC code inside client CoRRE... CVE-2019-8261 9.8 CriticalMarch 5, 2019
• ultravnc UltraVNC revision 1199 has a out-of-bounds read vulnerability in VNC client RRE decoder code,... CVE-2019-8260 9.8 CriticalMarch 5, 2019
• ultravnc, siemens sinumerik access mymachine\/p2p, sinumerik pcu base win10 software\/ipc +1 more +3 more UltraVNC revision 1198 contains multiple memory leaks (CWE-655) in VNC client code, which allow... CVE-2019-8259 7.5 HighMarch 5, 2019
• ultravnc, siemens sinumerik access mymachine\/p2p, sinumerik pcu base win10 software\/ipc +1 more +3 more UltraVNC revision 1198 has a heap buffer overflow vulnerability in VNC client code which results... CVE-2019-8258 9.8 CriticalMarch 5, 2019
• ultravnc UltraVNC revision 1198 has a buffer underflow vulnerability in VNC client code, which can... CVE-2018-15361 9.8 CriticalMarch 5, 2019