Windows 10 1607: Information disclosure in Print Spooler Components
Summary
Windows Print Spooler Components on Windows 10 Version 1607 and Windows Server 2016 contains an out-of-bounds read flaw (CWE-125). An unauthenticated attacker on the network can disclose information without user interaction. Microsoft says heap memory from a privileged process on a server could be exposed. Only confidentiality is affected.
Affected
- Windows 10 Version 1607: builds 10.0.14393.0 to below 10.0.14393.9612
- Windows Server 2016: builds 10.0.14393.0 to below 10.0.14393.9612
Fixed in
- Windows 10 Version 1607 and Windows Server 2016: build 10.0.14393.9612 or later, released with the October 13, 2026 Patch Tuesday updates
- KB number: Unknown. Take it from the MSRC Security Updates section.
Workaround
- Unknown. Microsoft's advisory is patch-first and no vendor workaround was verified.
- Third-party guidance (not from Microsoft): stop and disable the Print Spooler on systems that do not need printing.
Exploitation
- Not exploited in the wild, according to Microsoft.
- Not publicly disclosed.
- Microsoft rates exploitation as Less Likely.
- No public proof of concept found.
- EPSS is about 1.0%.
- CISA SSVC: exploitation none, automatable yes.
Our recommendation
- Identify Windows 10 1607 and Windows Server 2016 hosts with the Print Spooler running.
- Install the October 2026 security update on these hosts.
- Disable the Print Spooler on servers and domain controllers that do not print.
- Confirm that no Print Spooler service is reachable from the internet, a DMZ or untrusted networks.
- Check the Microsoft lifecycle status of Windows 10 1607, as it is an old release.
Information from Microsoft (Patch Tuesday October 2026)
- Severity (Microsoft)
- Important
- Impact
- Information disclosure – Windows Print Spooler Components
- Status on Patch Tuesday
- Neither exploited nor publicly disclosed
- Exploitability assessment
- Exploitation less likely
- Product family
- Windows, Windows ESU (Extended Security Updates)
- Updates (KB)
- KB5127648, KB5126651, KB5126655, KB5126657, KB5126646, KB5126653
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Microsoft Security Update Guide: CVE-2026-85353 msrc.microsoft.com
- NVD mirror on Vulners: CVE-2026-85353 vulners.com
- SentinelOne vulnerability database: CVE-2026-85353 www.sentinelone.com
- OpenCVE: CVE-2026-85353 app.opencve.io
- Rapid7 record on Vulners: CVE-2026-85353 vulners.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 2 Nov 2026, 18:36.
Original description (NVD)
Out-of-bounds read in Windows Print Spooler Components allows an unauthorized attacker to disclose information over a network.
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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