CVE-2016-5291: debian debian_linux Improper Input Validation
Vulnerability summary
CVE-2016-5291 is a medium (CVSS 5.5) Improper Input Validation vulnerability in debian debian_linux. EPSS estimates a 0.43% chance of exploitation in the next 30 days, higher than 37.6% of scored vulnerabilities. 1 public exploit is recorded.
Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 17 · Related 9Timeline
- 11-06-2018PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
A same-origin policy bypass with local shortcut files to load arbitrary local content from disk. This vulnerability affects Thunderbird < 45.5, Firefox ESR < 45.5, and Firefox < 50.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS trend
Probability
0.43%
Chance of exploitation in the next 30 days
Percentile
38%
Versus all other CVEs
30-day change
Decrease -0.01 pp
From 0.44% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundExploit Reference (bugzilla.mozilla.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Mozilla3 products
- firefox≥ unspecified, < 50 | < 45.5.0 | < 50.0
- firefox esr≥ unspecified, < 45.5
- thunderbird≥ unspecified, < 45.5 | < 45.5.0
Debian2 products
- firefox-esr< 45.5.0esr-1
- debian_linuxEOL8.0
Ubuntu2 products
- firefox< 50.0+build2-0ubuntu0.14.04.2 | < 50.0+build2-0ubuntu0.16.04.2
- thunderbird< 1:45.5.1+build1-0ubuntu0.14.04.1 | < 1:45.5.1+build1-0ubuntu0.16.04.1
3 vendors · 7 products
