CVE-2016-5289: mozilla firefox
Vulnerability summary
CVE-2016-5289 is a critical (CVSS 9.8) vulnerability in mozilla firefox. EPSS estimates a 2.02% chance of exploitation in the next 30 days, higher than 80.9% of scored vulnerabilities.
Severe, CVSS 9.8 (NVD); no exploitation reported by the 5 checked sources; EPSS 2% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 5 · Related 4Timeline
- 11-06-2018PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
Memory safety bugs were reported in Firefox 49. 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. This vulnerability affects Firefox < 50.
CVSS metrics
3 scores · 2 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
2.02%
Chance of exploitation in the next 30 days
Percentile
81%
Versus all other CVEs
30-day change
Increase +0.02 pp
From 1.99% 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
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Mozilla1 product
- firefox≥ unspecified, < 50 | < 50.0
Ubuntu1 product
- firefox< 50.0+build2-0ubuntu0.14.04.2 | < 50.0+build2-0ubuntu0.16.04.2
2 vendors · 2 products