Scfilter Cid87d25e32ac0d4ef0b1e0502c6b7dfb77 Patched Patched -

and a unique Hardware ID (CID) associated with a card reader or driver instance.

Kernel-level filter drivers—such as scfilter.sys and the cloud file mini-filter cldflt.sys —are highly lucrative targets for security researchers and adversaries because they execute with advanced system-level privileges.

When a vulnerability targeting a device framework like SCFILTER\CID_87d25e32ac0d4ef0b1e0502c6b7dfb77 is designated as , it means a security update has modified how the system handles driver enumeration and driver store verification. Memory Sanitization & Strict Parsing

: Users may notice a negligible increase in initial latency (

Configure advanced audit logs to monitor anomalous write requests or pointer modifications intersecting with the HKLM\SYSTEM\CurrentControlSet\Services\scfilter registry keys. scfilter cid87d25e32ac0d4ef0b1e0502c6b7dfb77 patched

# Search the system for the target smart card hardware identifier Get-PnpDevice -PresentOnly | Where-Object $_.HardwareID -match "87D25E32" Use code with caution. Step 2: Extract and Inspect the Patched INF Package

This article explores what this hardware ID means, why it requires patching or driver updates, and how to resolve errors associated with it. What is SCFILTER and CID87D25E32AC0D4EF0B1E0502C6B7DFB77?

When a log notes that this specific CID has been "patched," it generally indicates one of three system events:

The string refers to resolving a specialized Windows driver conflict involving the Smart Card Plug and Play (PnP) Filter Driver . Windows assigns unique hardware identifiers (Hardware IDs) to smart cards based on their Answer to Reset (ATR) bytes or card identifiers. When a system reports that a specific SCFILTER\CID_... hardware instance has been "patched," it usually means that a corrupted entry, an unreadable driver state, or a registry permission block preventing the card reader from communicating with the Windows Cryptographic service has been successfully fixed. and a unique Hardware ID (CID) associated with

The string "scfilter cid87d25e32ac0d4ef0b1e0502c6b7dfb77 patched"

does not refer to a formal academic paper or a documented security vulnerability in standard databases. Instead, it appears to be a specific identifier found in Windows system logs antivirus scan reports (like Norton Power Eraser or Farbar Recovery Scan Tool). Microsoft Learn Context of the Term scfilter.sys : This is the legitimate Smart Card PnP Class Filter Driver

) indicating a kernel-mode driver that has been modified or "patched" by malicious software Breakdown of the Components : This is the legitimate Windows Smart card PnP Class Filter Driver scfilter.sys

). It is a standard system driver used to support smart card readers. cid87d25e32ac0d4ef0b1e0502c6b7dfb77 Memory Sanitization & Strict Parsing : Users may

If you are seeing this behavior on a specific type of machine, AI responses may include mistakes. Learn more Share public link

Command: ./sc_update --apply-patch --cid 87d25e32ac0d4ef0b1e0502c6b7dfb77

Smart Card Plug and Play - Windows drivers | Microsoft Learn

: This is a default Microsoft kernel-mode driver ( scfilter.sys ) that acts as an Upper Filter driver. Its job is to monitor Smart Card readers, read the Answer to Reset (ATR) string from an inserted card, and try to match it against known minidrivers in the Windows Registry so the card can function seamlessly.