Product by Uvnc

UltraVNC

37 known vulnerabilities in UltraVNC (Uvnc), 0 of them actively exploited (CISA KEV).

Vulnerabilities

Actively exploited (KEV)

Used by ransomware

Critical

Vulnerabilities

Actively exploited vulnerabilities (CISA KEV) first, then by priority. Click a column header to re-sort the table.

Vulnerabilities in UltraVNC (Uvnc)

Critical	CVE-2026-7840	UltraVNC repeater HTTP server global buffer overflow via long URI (pre-auth RCE) also in 1 other product	9.8	01.07.2026
Critical	CVE-2019-8274	Kaspersky Lab UltraVNC: Heap-based Buffer Overflow also in 4 other products	9.8	09.03.2019
Critical	CVE-2019-8273	Kaspersky Lab UltraVNC: Heap-based Buffer Overflow also in 4 other products	9.8	09.03.2019
Critical	CVE-2019-8271	Kaspersky Lab UltraVNC: Heap-based Buffer Overflow also in 4 other products	9.8	09.03.2019
Critical	CVE-2019-8262	UltraVNC: Heap-based Buffer Overflow also in 4 other products	9.8	05.03.2019
Critical	CVE-2019-8258	UltraVNC: Heap-based Buffer Overflow also in 4 other products	9.8	05.03.2019
Critical	CVE-2019-8280	Kaspersky Lab UltraVNC: Access of Memory Location After End of Buffer also in 1 other product	9.8	09.03.2019
Critical	CVE-2019-8275	Kaspersky Lab UltraVNC: Improper Null Termination also in 4 other products	9.8	09.03.2019
Critical	CVE-2019-8268	Kaspersky Lab UltraVNC: Off-by-one Error also in 4 other products	9.8	09.03.2019
Critical	CVE-2019-8272	Kaspersky Lab UltraVNC: Off-by-one Error also in 4 other products	9.8	09.03.2019
High	CVE-2026-7838	UltraVNC viewer heap buffer overflow via integer overflow in RFB connection-failure reason length also in 1 other product	8.8	01.07.2026
Critical	CVE-2019-8265	Kaspersky Lab UltraVNC: Access of Memory Location After End of Buffer also in 1 other product	9.8	09.03.2019
Critical	CVE-2019-8264	Kaspersky Lab UltraVNC: Access of Memory Location After End of Buffer also in 1 other product	9.8	09.03.2019
Critical	CVE-2018-15361	UltraVNC: Buffer Underflow also in 1 other product	9.8	05.03.2019
Critical	CVE-2019-8266	Kaspersky Lab UltraVNC: Access of Memory Location After End of Buffer also in 1 other product	9.8	09.03.2019
High	CVE-2019-8269	Kaspersky Lab UltraVNC: Stack-based Buffer Overflow also in 4 other products	7.5	09.03.2019
High	CVE-2019-8276	Kaspersky Lab UltraVNC: Stack-based Buffer Overflow also in 4 other products	7.5	09.03.2019
Critical	CVE-2019-8260	UltraVNC: Out-of-bounds Read also in 1 other product	9.8	05.03.2019
Critical	CVE-2019-8261	UltraVNC: Out-of-bounds Read also in 1 other product	9.8	05.03.2019
High	CVE-2019-8259	UltraVNC: Improper Initialization also in 4 other products	7.5	05.03.2019
High	CVE-2019-8277	Kaspersky Lab UltraVNC: Improper Initialization also in 4 other products	7.5	09.03.2019
Medium	CVE-2019-8263	Kaspersky Lab UltraVNC: Stack-based Buffer Overflow also in 4 other products	6.5	05.03.2019
High	CVE-2019-8267	Kaspersky Lab UltraVNC: Out-of-bounds Read also in 1 other product	7.5	09.03.2019
High	CVE-2019-8270	Kaspersky Lab UltraVNC: Out-of-bounds Read also in 1 other product	7.5	09.03.2019
Medium	CVE-2026-7828	UltraVNC repeater integer overflow in win_log malloc leading to heap overflow also in 1 other product	5.3	01.07.2026

All vulnerabilities in search

News

@RISK®: The Consensus Security Vulnerability Alert: Vol. 26, Num. 26sans-atrisk-mail, 09.07.2026

All products by Uvnc

Key figures

Vulnerabilities

News