Vulnerability in Blackberry Qnx
CVE-2025-3939
Observable Response Discrepancy vulnerability in Tridium Niagara Framework on Windows, Linux, QNX, Tridium Niagara Enterprise Security on Windows, Linux, QNX allows Cryptanalysis. This issue affects Niagara Framework: before 4.14.2, before 4.15.1, before 4.10.11; Niagara Enterprise Security: before 4.14.2, before 4.15.1, before 4.10.11.Tridium recommends upgrading to Niagara Framework and Enterprise Security versions 4.14.2u2, 4.15.u1, or 4.10u.11.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (24.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 24.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Blackberry Qnx
- Linux Kernel
- Microsoft Windows
- Tridium Niagara — versions 4.10u10, 4.14u1, 4.15
- Tridium Niagara Enterprise Security — versions 0
- Tridium Niagara Enterprise Security — versions 4.10u10, 4.14u1, 4.15
- Tridium Niagara Framework — versions 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- honeywell.com/us/en/product-security (vendor-advisory, Vendor Advisory)
- docs.niagara-community.com/category/tech_bull (Permissions Required, vendor-advisory)
Frequently asked questions
- What is CVE-2025-3939?
- CVE-2025-3939 is a medium-severity vulnerability in Blackberry Qnx, classified under Observable Response Discrepancy. CVSS score: 5.3/10. Published 2025-05-22.
- How severe is CVE-2025-3939?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2025-3939 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.