CVE-2017-5392: mozilla firefox
Vulnerability summary
CVE-2017-5392 is a critical (CVSS 9.8) vulnerability in mozilla firefox. EPSS estimates a 1.73% chance of exploitation in the next 30 days, higher than 77.6% 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 2 · Related 2Timeline
- 11-06-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
Weak proxy objects have weak references on multiple threads when they should only have them on one, resulting in incorrect memory usage and corruption, which leads to potentially exploitable crashes. Note: This issue only affects Firefox for Android. Other operating systems are not affected. This vulnerability affects Firefox < 51.
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
1.73%
Chance of exploitation in the next 30 days
Percentile
78%
Versus all other CVEs
30-day change
Decrease -0.04 pp
From 1.77% 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, < 51 | < 51.0
1 vendor · 1 product