Is CVE-2014-6053 in the CISA KEV catalog?

No. CVE-2014-6053 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2014-6053?

CVE-2014-6053 has a CVSS v2 base score of 5.0 (MEDIUM).

What is the EPSS score for CVE-2014-6053?

CVE-2014-6053 has an EPSS score of 7.56% (94th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2014-6053?

Upgrade libvncserver on debian 11 to 0.9.9+dfsg-6.1 or later. Fixes are available for 8 affected products.

CVE & CISA-KEV Catalog

CVE-2014-6053

MEDIUMEPSS 94th pctl

5.0

CVSS v2

NVD

Description

The rfbProcessClientNormalMessage function in libvncserver/rfbserver.c in LibVNCServer 0.9.9 and earlier does not properly handle attempts to send a large amount of ClientCutText data, which allows remote attackers to cause a denial of service (memory consumption or daemon crash) via a crafted message that is processed by using a single unchecked malloc.

CWE-19

How to fix

Remediation Available

libvncserverDebian

Fixed in:0.9.9+dfsg-6.1CVE-2014-6053

italcUbuntu

Fixed in:1:2.0.2+dfsg1-4ubuntu0.1USN-4587-1

italc-clientUbuntu

Fixed in:1:2.0.2+dfsg1-4ubuntu0.1USN-4587-1

italc-masterUbuntu

Fixed in:1:2.0.2+dfsg1-4ubuntu0.1USN-4587-1

libitalccoreUbuntu

Fixed in:1:2.0.2+dfsg1-4ubuntu0.1USN-4587-1

libvncserverUbuntu

Fixed in:0.9.9+dfsg-1ubuntu1.1USN-2365-1

libvncserver0Ubuntu

Fixed in:0.9.9+dfsg-1ubuntu1.1USN-2365-1

vinoUbuntu

Fixed in:3.8.1-0ubuntu9.3USN-4573-1

Fixed in:3.22.0-3ubuntu1.1USN-4573-1

Fixed in:3.22.0-5ubuntu2.1USN-4573-1

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

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

7.56%probability of exploitation in 30 days

94thpercentile

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

References

Patch1

github.com

Third-Party Advisory5

Other references9

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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 2026-05-06.