UltraVNC revision 1199 has a out-of-bounds read vulnerability in VNC code inside client CoRRE decoder, caused by multiplication overflow.…

Description

UltraVNC revision 1199 has a out-of-bounds read vulnerability in VNC code inside client CoRRE decoder, caused by multiplication overflow. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1200.

Scores

EPSS (exploitation in 30 days)

2.2% · top 17% of all CVEs (4 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.

Weakness

• CWE-125: Out-of-bounds Read (opens in a new tab)All about CWE-125 and its CVEs

Affected products

• UltraVNC · UltraVNC

  • affected 1.2.2.3

References (6)

• https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-007-ultravnc-out-of-bound-read/ (opens in a new tab)x_refsource_MISCx_transferred
• https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://www.us-cert.gov/ics/advisories/icsa-20-161-06 (opens in a new tab)x_refsource_MISCx_transferred
• https://cert-portal.siemens.com/productcert/pdf/ssa-940818.pdf (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://cert-portal.siemens.com/productcert/pdf/ssa-286838.pdf (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://us-cert.cisa.gov/ics/advisories/icsa-21-131-11 (opens in a new tab)x_refsource_MISCx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2019-8261](https://trackcve.app/badge/CVE-2019-8261.svg)](https://trackcve.app/cve/CVE-2019-8261)

Record last updated 17 Sept 2024, 03:12 UTC.