How severe is CVE-2014-3756?

CVE-2014-3756 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2014-3756 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2014-3756?

CVE-2014-3756 primarily affects Mumble. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2014-3756?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2014-3756 published?

CVE-2014-3756 was published on 2014-11-16 and last updated on 2026-06-17.

CVE-2014-3756

CVE-2014-3756 is a medium-severity vulnerability in Mumble with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-19.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 1% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-19
Affected product: Mumble
Published: 2014-11-16
Last modified: 2026-06-17

Description

The client in Mumble 1.2.x before 1.2.6 allows remote attackers to force the loading of an external file and cause a denial of service (hang and resource consumption) via a crafted string that is treated as rich-text by a Qt widget, as demonstrated by the (1) user or (2) channel name in a Qt dialog, (3) subject common name or (4) email address to the Certificate Wizard, or (5) server name in a tooltip.

Frequently asked questions

What is CVE-2014-3756?: The client in Mumble 1.2.x before 1.2.6 allows remote attackers to force the loading of an external file and cause a denial of service (hang and resource consumption) via a crafted string that is treated as rich-text by a Qt widget, as demonstrated by the (1) user or (2) channel name in a Qt dialog, (3) subject common name or (4) email address to the Certificate Wizard, or (5) server name in a tooltip.
How severe is CVE-2014-3756?: CVE-2014-3756 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2014-3756 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2014-3756?: CVE-2014-3756 primarily affects Mumble. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2014-3756?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2014-3756 published?: CVE-2014-3756 was published on 2014-11-16 and last updated on 2026-06-17.

References

Affected products (11)

cpe:2.3:a:mumble:mumble:1.2.0:*:*:*:*:*:*:*
cpe:2.3:a:mumble:mumble:1.2.1:*:*:*:*:*:*:*
cpe:2.3:a:mumble:mumble:1.2.2:*:*:*:*:*:*:*
cpe:2.3:a:mumble:mumble:1.2.3:*:*:*:*:*:*:*
cpe:2.3:a:mumble:mumble:1.2.3:rc1:*:*:*:*:*:*
cpe:2.3:a:mumble:mumble:1.2.3:rc2:*:*:*:*:*:*
cpe:2.3:a:mumble:mumble:1.2.3:rc3:*:*:*:*:*:*
cpe:2.3:a:mumble:mumble:1.2.4:*:*:*:*:*:*:*
cpe:2.3:a:mumble:mumble:1.2.4:beta1:*:*:*:*:*:*
cpe:2.3:a:mumble:mumble:1.2.4:rc1:*:*:*:*:*:*
cpe:2.3:a:mumble:mumble:1.2.5:*:*:*:*:*:*:*

More vulnerabilities in Mumble

CVE-2021-27229 — High (CVSS 8.8): Mumble before 1.3.4 allows remote code execution if a victim navigates to a crafted URL on a server list and clicks on…
CVE-2020-13962 — High (CVSS 7.5): Qt 5.12.2 through 5.14.2, as used in unofficial builds of Mumble 1.3.0 and other products, mishandles OpenSSL's error…
CVE-2018-20743 — High (CVSS 7.5): murmur in Mumble through 1.2.19 before 2018-08-31 mishandles multiple concurrent requests that are persisted in the…
CVE-2010-2490 — Medium (CVSS 6.5): Mumble: murmur-server has DoS due to malformed client query
CVE-2014-3755 — Medium (CVSS 5.0): The QSvg module in Qt, as used in the Mumble client 1.2.x before 1.2.6, allows remote attackers to cause a denial of…
CVE-2025-71264 — Low (CVSS 3.7): Mumble before 1.6.870 is prone to an out-of-bounds array access, which may result in denial of service (client crash).

All CVEs affecting Mumble →

Other CWE-19 vulnerabilities

CVE-2015-2373 — Critical (CVSS 10.0): The Remote Desktop Protocol (RDP) server service in Microsoft Windows 7 SP1, Windows 8, and Windows Server 2012 allows…
CVE-2014-8822 — Critical (CVSS 10.0): IOHIDFamily in Apple OS X before 10.10.2 allows attackers to execute arbitrary code in a kernel context or cause a…
CVE-2014-8817 — Critical (CVSS 10.0): coresymbolicationd in CoreSymbolication in Apple OS X before 10.10.2 does not verify that expected data types are…
CVE-2014-4488 — Critical (CVSS 10.0): IOHIDFamily in Apple iOS before 8.1.3, Apple OS X before 10.10.2, and Apple TV before 7.0.3 does not properly validate…
CVE-2014-7247 — Critical (CVSS 10.0): Unspecified vulnerability in JustSystems Ichitaro 2008 through 2011; Ichitaro Government 6, 7, 2008, 2009, and 2010;…
CVE-1999-0226 — Critical (CVSS 10.0): Windows NT TCP/IP processes fragmented IP packets improperly, causing a denial of service.

Browse all CWE-19 vulnerabilities →