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CVE-2016-5294

The Mozilla Updater can be made to choose an arbitrary target working directory for output files...

5.5 Medium

The Mozilla Updater can be made to choose an arbitrary target working directory for output files resulting from the update process. This vulnerability requires local system access. Note: this issue only affects Windows operating systems. This vulnerability affects Thunderbird < 45.5, Firefox ESR < 45.5, and Firefox < 50.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
High
Availability
None

Exploit likelihood

0.41%Down 0.6 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 5.5

The Mozilla Updater can be made to choose an arbitrary target working directory for output files resulting from the update process. This vulnerability requires local system access. Note: this issue only affects Windows operating systems. This vulnerability affects Thunderbird < 45.5, Firefox ESR < 45.5, and Firefox < 50.

Record
CVE-2016-5294
CVSS 3.0
5.5 MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CVSS 2.0
2.1 LowAV:L/AC:L/Au:N/C:N/I:P/A:N
Weakness
CWE-20
Updated
2026-11-02
CVE List No score

The Mozilla Updater can be made to choose an arbitrary target working directory for output files resulting from the update process. This vulnerability requires local system access. Note: this issue only affects Windows operating systems. This vulnerability affects Thunderbird < 45.5, Firefox ESR < 45.5, and Firefox < 50.

Record
CVE-2016-5294
Updated
2026-11-02
EUVDEUVD-2016-6245 No score

The Mozilla Updater can be made to choose an arbitrary target working directory for output files resulting from the update process. This vulnerability requires local system access. Note: this issue only affects Windows operating systems. This vulnerability affects Thunderbird < 45.5, Firefox ESR < 45.5, and Firefox < 50.

Record
EUVD-2016-6245
Updated
2026-11-03
GitHub AdvisoriesGHSA-pwq7-q338-mgmf 5.5

The Mozilla Updater can be made to choose an arbitrary target working directory for output files...

The Mozilla Updater can be made to choose an arbitrary target working directory for output files resulting from the update process. This vulnerability requires local system access. Note: this issue only affects Windows operating systems. This vulnerability affects Thunderbird < 45.5, Firefox ESR < 45.5, and Firefox < 50.

Record
GHSA-pwq7-q338-mgmf
CVSS 3.0
5.5 MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Weakness
CWE-20
Updated
2026-11-02
OSVMGASA-2016-0409 No score

Updated thunderbird packages fix security vulnerabilities

A heap-buffer-overflow in Cairo when processing SVG content caused by compiler optimization, resulting in a potentially exploitable crash (CVE-2016-5296).

The Mozilla Updater can be made to choose an arbitrary target working directory for output files resulting from the update process. This vulnerability requires local system access (CVE-2016-5294).

An error in argument length checking in JavaScript, leading to potential integer overflows or other bounds checking issues (CVE-2016-5297).

A buffer overflow resulting in a potentially exploitable crash due to memory allocation issues when handling large amounts of incoming data (CVE-2016-9066).

A same-origin policy bypass with local shortcut files to load arbitrary local content from disk (CVE-2016-5291).

Mozilla developers and community members Olli Pettay, Christian Holler, Ehsan Akhgari, Jon Coppeard, Gary Kwong, Tooru Fujisawa, Philipp, and Randell Jesup reported memory safety bugs present in Thunderbird ESR 45.4. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code (CVE-2016-5290).

A use-after-free vulnerability in SVG Animation has been discovered. An exploit built on this vulnerability has been discovered in the wild targeting Firefox and Tor Browser users on Windows (CVE-2016-9079).

Record
MGASA-2016-0409
Updated
2026-11-02
OSVopenSUSE-SU-2024:10071-1 No score

MozillaFirefox-50.1.0-1.1 on GA media

These are all security issues fixed in the MozillaFirefox-50.1.0-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:10071-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:14572-1 No score

firefox-esr-128.5.1-1.1 on GA media

These are all security issues fixed in the firefox-esr-128.5.1-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:14572-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
thunderbird
Mageia:5
From an advisory covering 7 CVEs
before 45.5.1-1.mga5
45.5.1-1.mga5
thunderbird-l10n
Mageia:5
From an advisory covering 7 CVEs
before 45.5.1-1.mga5
45.5.1-1.mga5
MozillaFirefox
openSUSE:Tumbleweed
From an advisory covering 899 CVEs
before 50.1.0-1.1
50.1.0-1.1
firefox-esr
openSUSE:Tumbleweed
From an advisory covering 1860 CVEs
before 128.5.1-1.1
128.5.1-1.1

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2016-5294 is a medium vulnerability (CVSS 5.5) in Mozilla Firefox, published December 5, 2016. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.41%, the 35th percentile. No source names a fixed version.

References

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