CVE & CISA-KEV Catalog

CVE-2019-8271

CRITICALEPSS 94th pctl
9.8
CVSS v3
NVD

Description

UltraVNC revision 1211 has a heap buffer overflow vulnerability in VNC server code inside file transfer handler, which can potentially result code execution. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1212.

CWE-122Heap-based Buffer OverflowCWE-787Out-of-bounds Write

How to fix

Remediation Available
sinumerik access mymachine\/p2pNVD
Affected:< 4.8Fixed in:4.8CVE-2019-8271derived from NVD
sinumerik pcu base win10 software\/ipcNVD
Affected:< 14.00Fixed in:14.00CVE-2019-8271derived from NVD
ultravncNVD
Affected:< 1.2.2.3Fixed in:1.2.2.3CVE-2019-8271derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

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

Exploit Intelligence

8.26%probability of exploitation in 30 days
94thpercentile

High risk: more likely to be exploited than 94% of all known CVEs.

References

Related Vulnerabilities

Other CWE-122 (Heap-based Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2015-3113Critical9.8100%KEVFix
CVE-2024-26256High7.888%-Fix
CVE-2020-25687Medium5.987%-Fix
CVE-2009-3459High8.887%KEVFix
CVE-2021-21017High8.886%KEV-
CVE-2020-25683Medium5.986%-Fix

Common questions

How do I fix CVE-2019-8271?

Published advisories record a fix for 3 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2019-8271 being actively exploited?

Not that we know of. CVE-2019-8271 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 8.3% is the estimated probability that it will be exploited in the next 30 days. That is higher than 94% of all scored CVEs.

How severe is CVE-2019-8271?

CVE-2019-8271 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2019-8271 affect?

Published advisories record a fix for sinumerik access mymachine\/p2p (NVD), sinumerik pcu base win10 software\/ipc (NVD), ultravnc (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.