Vulnerability record · CVE-2018-15361 · published 5 March 2019

CVE-2018-15361: Uvnc ultravnc out-of-bounds write vulnerability

Uvnc · Ultravnc

UltraVNC revision 1198 has a buffer underflow vulnerability in VNC client code, which can potentially result in code execution. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1199.

9.8 CVSS 3.0 Critical EPSS 2.9% · top 13.4% CWE-124 · CWE-124CWE-787 · Out-of-bounds write

9.8CVSS 3.0 base score, v2 7.5

2.9%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

6References

17 Jun 2026Last modified by NVD

Description

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Ultravnc Uvnc

References

Link	Tags
https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-003-ultravnc-buffer-underwrite/	Third Party Advisory
https://www.us-cert.gov/ics/advisories/icsa-20-161-06
https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-003-ultravnc-buffer-underwrite/	Third Party Advisory
https://www.us-cert.gov/ics/advisories/icsa-20-161-06

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2018-15361), CISA KEV, FIRST EPSS (scores of 2026-10-17). This page is refreshed as NVD updates the record.