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Vulnerability record · CVE-2019-8269 · published 8 March 2019

CVE-2019-8269: Uvnc ultravnc stack-based buffer overflow vulnerability

Uvnc · Ultravnc

UltraVNC revision 1206 has stack-based Buffer overflow vulnerability in VNC client code inside FileTransfer module, which leads to a denial of service (DoS) condition. This attack appear to be exploitable via network connectivity. This vulnerability has been fixed in revision 1207.

7.5 CVSS 3.1 High EPSS 5.7% · top 7.2% CWE-121 · Stack-based buffer overflowCWE-787 · Out-of-bounds write
7.5CVSS 3.1 base score, v2 5.0
5.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

UltraVNC revision 1206 has stack-based Buffer overflow vulnerability in VNC client code inside FileTransfer module, which leads to a denial of service (DoS) condition. This attack appear to be exploitable via network connectivity. This vulnerability has been fixed in revision 1207.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

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

References

LinkTags
https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf Third Party Advisory
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-016-ultravnc-stack-based-buffer-overflo Third Party Advisory
https://www.us-cert.gov/ics/advisories/icsa-20-161-06 Third Party AdvisoryUS Government Resource
https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf Third Party Advisory
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-016-ultravnc-stack-based-buffer-overflo Third Party Advisory
https://www.us-cert.gov/ics/advisories/icsa-20-161-06 Third Party AdvisoryUS Government Resource

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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-2019-8269), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.