Vulnerability in Apple macOS
CVE-2026-50659
Improper encoding or escaping of output in .NET allows an authorized attacker to perform spoofing over a network.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.007 (53.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.007 · change: +0.002
Affected products
- Apple macOS
- Linux Kernel
- Microsoft .Net Framework 3.5 — versions 3.5.0
- Microsoft .Net Framework 3.5 And 4.7.2 — versions 4.7.0
- Microsoft .Net Framework 3.5 And 4.8 — versions 4.8.0
- Microsoft .Net Framework 3.5 And 4.8.1 — versions 4.8.1
- Microsoft .Net Framework 4.6.2/4.7/4.7.1/4.7.2 — versions 4.7.0
- Microsoft .Net Framework 4.8 — versions 4.8.0
- Microsoft .Net Framework 4.8.1 — versions 4.8.0.0
- Microsoft Visual Studio 2022 Version 17.12 — versions 17.12.0
Weakness classification (CWE)
References
- .NET Spoofing Vulnerability (vendor-advisory, Patch, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-50659?
- CVE-2026-50659 is a medium-severity vulnerability in Apple macOS, classified under Improper Encoding or Escaping of Output. CVSS score: 6.5/10. Published 2026-07-14.
- How severe is CVE-2026-50659?
- Medium severity. CVSS v3 base score is 6.5 out of 10.