---
title: "CVE-2016-5295\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2016-5295?format=md
keywords: index, follow
---

# CVE-2016-5295

Publication date 11 June 2018

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**7.8 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2016-5295?format=md#impact-score)

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## Description

This vulnerability allows an attacker to use the Mozilla Maintenance
Service to escalate privilege by having the Maintenance Service invoke the
Mozilla Updater to run malicious local files. This vulnerability requires
local system access and is a variant of MFSA2013-44. Note: this issue only
affects Windows operating systems. This vulnerability affects Firefox < 50.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2016-5295?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| firefox | 16.10 yakkety | Not affected |
| 16.04 LTS xenial | Not affected |
| 14.04 LTS trusty | Not in release |
| 12.04 LTS precise | Not affected |
| thunderbird | 16.10 yakkety | Not affected |
| 16.04 LTS xenial | Not affected |
| 14.04 LTS trusty | Not in release |
| 12.04 LTS precise | Not affected |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Notes

---

### [sbeattie](https://launchpad.net/~sbeattie)

windows only

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

7.8 · High

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Local |
  | Attack complexity | Low |
  | Privileges required | Low |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | High |
  | Integrity impact | High |
  | Availability impact | High |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.8 · High |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5295)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2016-5295)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2016-5295)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2016-5295)

### Other references

* <https://www.mozilla.org/en-US/security/advisories/mfsa2016-89/>
* <https://www.cve.org/CVERecord?id=CVE-2016-5295>