CVE-2026-83670
Status: Awaiting AnalysisHigh (7.5)—
Severity7.5High · CVSS 3.1
Exploitation probability0.96 %higher than 61% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitNot knownno public code found
Out-of-bounds read in Function Discovery Service (fdwsd.dll) allows an unauthorized attacker to disclose information over a network.
CVSS
- Base score
- 7.5
- Version
- 3.1
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days
- 0.96 %
- Percentile among all scored CVEs
- 61
- Score date
- 10/20/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
ATT&CK techniques
How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.
- Exploitation
T1190Exploit Public-Facing Applicationinitial access90 % - Primary impact
T1005Data from Local Systemcollection45 %
Lectura fuera de límites en fdwsd.dll sin autenticación ni interacción por red (AV:N/PR:N/UI:N, C:H); el texto solo menciona divulgación de información, no ejecución de comandos, así que se descarta T1059 de la pista.
Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.
ATT&CK mitigations that cover these techniques
Affected technologies (1)
⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.
CWEs
- CWE-125
References
Show 1 references
Raw JSON (NVD)
Show
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"published": "2026-10-13T19:20:08.860",
"references": [
{
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83670",
"source": "secure@microsoft.com"
}
],
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"type": "Secondary",
"source": "secure@microsoft.com",
"description": [
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}
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}
],
"descriptions": [
{
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"value": "Out-of-bounds read in Function Discovery Service (fdwsd.dll) allows an unauthorized attacker to disclose information over a network."
}
],
"lastModified": "2026-10-16T16:21:14.900",
"sourceIdentifier": "secure@microsoft.com"
}