CVE-2026-83670
7.5HighPublished 13 Oct 2026 · NVD status: Awaiting Analysis · AI triage by gemini-3.8-flash
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Impact
- High impact on confidentiality
- Weakness
- CWE-125
Impact
Unauthenticated attackers can read sensitive memory contents remotely over the network. They only need network reachability to the Function Discovery Service.
Root cause
An out-of-bounds read vulnerability exists in the Function Discovery Service library (fdwsd.dll).
Affected systems
Versions not listed — check the vendor advisory.
CVSS v3.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Fix & remediation
Install the Microsoft security update for CVE-2026-83670 from MSRC. As an interim mitigation, disable or restrict network access to the Function Discovery Provider Host and Function Discovery Resource Publication services.
$ Get-Service -Name fdPHost, FDResPub | Stop-Service -PassThru | Set-Service -StartupType DisabledAI-suggested. Run it in staging first and check it against the vendor advisory. Why?
NVD description
Out-of-bounds read in Function Discovery Service (fdwsd.dll) allows an unauthorized attacker to disclose information over a network.