CVE-2025-60705 — Windows Client-Side Caching Elevation of Privilege Vulnerability

Executive Summary

Improper access control in Windows Client-Side Caching (CSC) Service allows an authorized attacker to elevate privileges locally.

Overview

7.8

CVSS HIGH

Important

MS Severity

Not Exploited

MS Exploit Status

More Likely

MS Exploit Likelihood

Category Elevation of Privilege

Weakness CWE-284: Improper Access Control

Released Nov 11 2025

Last Updated Nov 11 2025

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score 0.02351 — 0.81938 percentile

NVD CVSS 7.8 HIGH — matches MSRC

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

ATTACK VECTOR

Local

ATTACK COMPLEXITY

Low

PRIVILEGES REQUIRED

Low

USER INTERACTION

None

SCOPE

Unchanged

CONFIDENTIALITY

High

INTEGRITY

High

AVAILABILITY

High

EXPLOIT CODE MATURITY

Unproven

REMEDIATION LEVEL

Official Fix

REPORT CONFIDENCE

Confirmed

Temporal Score: 6.8

EPSS Score

0.02351

probability of exploitation in the next 30 days

0.81938 percentile - updated 2026-07-25

View on FIRST.org

Affected Products

21 affected products

Product	KB Article	Severity	Impact	Restart Required
Windows 10 Version 1607 for 32-bit Systems	`5068864 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 1607 for x64-based Systems	`5068864 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 1809 for 32-bit Systems	`5068791 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 1809 for x64-based Systems	`5068791 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 21H2 for 32-bit Systems	`5068781 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 21H2 for ARM64-based Systems	`5068781 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 21H2 for x64-based Systems	`5068781 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 22H2 for 32-bit Systems	`5068781 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 22H2 for ARM64-based Systems	`5068781 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 22H2 for x64-based Systems	`5068781 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 11 Version 23H2 for ARM64-based Systems	`5068865 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 11 Version 23H2 for x64-based Systems	`5068865 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 11 Version 24H2 for ARM64-based Systems 5068861 (Security Update) 5068966 (Security Hotpatch Update) Important Elevation of Privilege 5066835 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 10.0.26100.7171 10.0.26100.7092 Yes None Windows 11 Version 24H2 for x64-based Systems 5068861 (Security Update) 5068966 (Security Hotpatch Update) Important Elevation of Privilege 5066835 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 10.0.26100.7171 10.0.26100.7092 Yes None Windows 11 Version 25H2 for ARM64-based Systems 5068861 (Security Update) 5068966 (Security Hotpatch Update) Important Elevation of Privilege 5066835 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 10.0.26200.7171 10.0.26200.7092 Yes None Windows 11 Version 25H2 for x64-based Systems 5068861 (Security Update) 5068966 (Security Hotpatch Update) Important Elevation of Privilege 5066835 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 10.0.26200.7171 10.0.26200.7092 Yes None Windows Server 2008 for 32-bit Systems Service Pack 2 5068906 (Monthly Rollup) 5068909 (Security Only) Important Elevation of Privilege 5066874 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.0.6003.23624 Yes None Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 5068906 (Monthly Rollup) 5068909 (Security Only) Important Elevation of Privilege 5066874 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.0.6003.23624 Yes None Windows Server 2008 for x64-based Systems Service Pack 2 5068906 (Monthly Rollup) 5068909 (Security Only) Important Elevation of Privilege 5066874 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.0.6003.23624 Yes None Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 5068906 (Monthly Rollup) 5068909 (Security Only) Important Elevation of Privilege 5066874 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.0.6003.23624 Yes None Windows Server 2008 R2 for x64-based Systems Service Pack 1 5068904 (Monthly Rollup) 5068908 (Security Only) Important Elevation of Privilege 5066872 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.1.7601.28021 Yes None Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 5068904 (Monthly Rollup) 5068908 (Security Only) Important Elevation of Privilege 5066872 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.1.7601.28021 Yes None Windows Server 2012	`5068907 (Monthly Rollup)`	Important	Elevation of Privilege	Yes
Windows Server 2012 (Server Core installation)	`5068907 (Monthly Rollup)`	Important	Elevation of Privilege	Yes
Windows Server 2012 R2	`5068905 (Monthly Rollup)`	Important	Elevation of Privilege	Yes
Windows Server 2012 R2 (Server Core installation)	`5068905 (Monthly Rollup)`	Important	Elevation of Privilege	Yes
Windows Server 2016	`5068864 (Security Update)`	Important	Elevation of Privilege	Yes
Windows Server 2016 (Server Core installation)	`5068864 (Security Update)`	Important	Elevation of Privilege	Yes
Windows Server 2019	`5068791 (Security Update)`	Important	Elevation of Privilege	Yes
Windows Server 2019 (Server Core installation)	`5068791 (Security Update)`	Important	Elevation of Privilege	Yes
Windows Server 2022 5068787 (Security Update) 5068840 (Security Hotpatch Update) Important Elevation of Privilege 5066782 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 10.0.20348.4405 10.0.20348.4346 Yes None Windows Server 2022 (Server Core installation) 5068787 (Security Update) 5068840 (Security Hotpatch Update) Important Elevation of Privilege 5066782 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 10.0.20348.4405 10.0.20348.4346 Yes None Windows Server 2022, 23H2 Edition (Server Core installation)	`5068779 (Security Update)`	Important	Elevation of Privilege	Yes

Patches

7 patches

Article	Type	Restart
`5068864`	Security Update	Yes
`5068791`	Security Update	Yes
`5068781`	Security Update	Yes
`5068865`	Security Update	Yes
`5068907`	Monthly Rollup	Yes
`5068905`	Monthly Rollup	Yes
`5068779`	Security Update	Yes

Patch Diff

capstone (x86_64 disassembly) + pefile — ZwCreateKey/ZwOpenKey IAT cross-reference and Attributes pattern matching; PDB symbols not available in analysis environment · csc.sys (KB5068861)

CVE-2025-60705 patch (KB5068861, November 11 2025) fixes a privilege check bypass in csc.sys (Windows Client-Side Caching kernel driver). Root cause: CscRebootRenamepOpenKey called ZwCreateKey/ZwOpenKey with OBJECT_ATTRIBUTES.Attributes = 0x240 (OBJ_KERNEL_HANDLE | OBJ_CASE_INSENSITIVE) — missing OBJ_FORCE_ACCESS_CHECK (0x400). A low-privileged user triggers the vulnerable path via IOfflineFilesCache::RenameItem (COM) → IRP_MJ_FILE_SYSTEM_CONTROL → CscRebootRenameAddEntry → CscRebootRenamepOpenKey. By placing a registry symbolic link at HKLM\SYSTEM\CurrentControlSet\Services\CSC\Parameters\RebootRename, the attacker causes csc.sys (running as SYSTEM) to create arbitrary registry keys in protected hives. Patch adds a feature flag-gated explicit caller privilege check: function grew 162→406 bytes; new helper at 0x140050420 validates caller identity before ZwCreateKey/ZwOpenKey; feature disabled (kill-switch) path preserves old behavior for controlled rollout. Fix approach differs from CVE-2025-62455 (mqac.sys): instead of adding OBJ_FORCE_ACCESS_CHECK to Attributes, an explicit pre-call access check is inserted. Reporter: T0 (@t0zhang). Similar CVE: CVE-2022-35820.

Pre-patch version 10.0.26100.5074 Download

Post-patch version 10.0.26100.7171 Download

Function	Address	Change	Note
`CscRebootRenamepOpenKey`	`0x140050870 → 0x140050974`	code, length, address	162 → 406 bytes (+244 bytes). Primary patch site. Pre-patch: calls ZwCreateKey/ZwOpenKey directly with OBJECT_ATTRIBUTES.Attributes = 0x240 (OBJ_KERNEL_HANDLE \| OBJ_CASE_INSENSITIVE), no caller privilege check. Post-patch: feature flag evaluator (call 0x1400220c4) added at function entry; when feature enabled, new explicit caller access-check helper (call 0x140050420, pool tag 'CsrR') validates the caller's security context before any registry operation; if check fails (NTSTATUS < 0), ZwCreateKey/ZwOpenKey are skipped and error returned. Feature disabled (kill-switch) path at 0x140050a95 falls through to original behavior with Attributes = 0x240. The Attributes value itself is NOT changed to 0x640 — fix is an explicit privilege check, not OBJ_FORCE_ACCESS_CHECK.
`CscRebootRenamepOpenKey::PrivilegeCheckHelper`	`new → 0x140050420`	new function	New helper added to post-patch binary. ~0xe9 bytes. Acquires current thread security context, allocates kernel buffer (ExAllocatePoolWithTag, pool tag 'CsrR', 0x100 bytes), performs Object Manager access check via ObReferenceObjectByPointer-class routine against the caller's token. Returns NTSTATUS — negative means caller lacks privileges, positive means check passed. Called only when feature flag is enabled.
`FeatureFlagEvaluator`	`new → 0x1400220c4`	new function	41 bytes. Reads global feature state from .data section (RVA 0x3d850, VA 0x14003d850). If state & 0x10 (initialized bit): returns state & 1 (enabled=1, disabled=0). Otherwise calls internal feature computation helper. Return value 0 = feature disabled (old path), non-zero = feature enabled (new privilege-check path). Same Windows Feature Experimentation/Velocity kill-switch pattern as CVE-2025-62455 (mqac.sys).

View full diff report View RCA report Download PoC

Known Exploits

No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.

Acknowledgments

T0

References

MSRC Advisory MITRE NVD