CVE-2019-8261
UltraVNC revision 1199 has a out-of-bounds read vulnerability in VNC code inside client CoRRE...
CVE-2019-8261 is a critical vulnerability (CVSS 9.8) in Ultravnc, published March 5, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.24%, the 83rd percentile. No source names a fixed version.
- Severity
- 9.8 CriticalCVSS 3.0, NVD
- Exploit chance
- 2.24%EPSS, 83rd percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
- No fix listedNo source names one
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
Affected products
What each source reports
NVD Score used
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.
- Record
CVE-2019-8261- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-125
- Updated
- 2026-11-02
CVE ListNo score
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.
- Record
CVE-2019-8261- Weakness
- CWE-125
- Updated
- 2026-11-02
EUVDEUVD-2019-17659No score
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.
- Record
EUVD-2019-17659- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-frcm-7p38-7j57
UltraVNC revision 1199 has a out-of-bounds read vulnerability in VNC code inside client CoRRE...
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.
- Record
GHSA-frcm-7p38-7j57- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-125
- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
References
ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-007-ultravnc-out-of-bound-read
cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf
us-cert.gov/ics/advisories/icsa-20-161-06
us-cert.cisa.gov/ics/advisories/icsa-21-131-11
nvd.nist.gov/vuln/detail/CVE-2019-8261
github.com/advisories/GHSA-frcm-7p38-7j57