CVE-2025-32706 KEVPublic exploit High · 7.8 EPSS 2.3%
Microsoft Windows Common Log File System (CLFS) Driver Heap-Based Buffer Overflow Vulnerability
Microsoft · Windows
Summary
A heap-based buffer overflow in the Common Log File System (CLFS) driver of Microsoft Windows, caused by improper input validation, lets a local user escalate privileges. An attacker needs an existing low-privilege authenticated account on the local machine, and no user interaction is required.
Official description · NVD
Improper input validation in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.
Priority scorePatchfirst’s 0 to 100 ranking. It adds points for CISA KEV listing, ransomware use, EPSS, threat reports, public exploit code and CVSS. Every CVE page shows the breakdown. Breakdown
65.2 / 100
- Exploited
- Yes, in CISA KEV
- Reports
- 0
- Tactics
- 5/15
How an attack unfolds
Based on MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. mappings. Select a step to see the evidence.How attackers get in
What they do
Exploitation timelineDated milestones for a CVE: when it was disclosed, when exploit code became public, when exploitation was confirmed, and when threat reports named it.
First seen exploited the day it was disclosed.
CISA KEV listing is when exploitation was confirmed, not necessarily the first attack.
MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. techniques
5 TechniqueOne specific attacker behaviour in MITRE ATT&CK, such as T1190 “Exploit Public-Facing Application”. IDs with a dot, like T1059.004, are sub-techniques., grouped by TacticThe attacker’s goal at a stage of an attack in MITRE ATT&CK, such as Initial Access or Persistence. Each technique belongs to one or more tactics. in kill-chain order 5Resource DevelopmentTA0042
Upload Malware T1608.001
MITRE CTID mapping of the KEV entry · primary impact
Attackers have exploited this heap-based buffer overflow vulnerability to escalate their privileges to SYSTEM-level, allowing them to execute arbitrary code, disable security tools, deploy malicious payloads, and extract credentials from memory.
ExecutionTA0002
MITRE CTID mapping of the KEV entry · how it is exploited
PersistenceTA0003
MITRE CTID mapping of the KEV entry · primary impact
Privilege EscalationTA0004
MITRE CTID mapping of the KEV entry · how it is exploited
Credential AccessTA0006
LSASS Memory T1003.001
MITRE CTID mapping of the KEV entry · primary impact
Detection
0 rules for this CVE · 214 general rules for its techniquesRules for this CVE
0Sigma ruleAn open, vendor-neutral detection rule for log data. Security teams convert Sigma rules into searches for their own SIEM. that reference CVE-2025-32706 directly.CVE-specific rules are not available in this build. Search SigmaHQ ↗
General rules for this CVE’s techniques
These detect the technique in general, not this specific vulnerability.
Command and Scripting InterpreterT105995 general rules
- HackTool - Sliver C2 Implant Activity Patterncriticaltest
- Lazarus Group Activitycriticaltest
- REvil Kaseya Incident Malware Patternscriticaltest
- Turla Group Lateral Movementcriticaltest
- Windows Defender AMSI Trigger Detectedhighstable
- Windows Defender Threat Detectedhighstable
- Abusable DLL Potential Sideloading From Suspicious Locationhightest
- Add Insecure Download Source To Wingethightest
Exploitation for Privilege EscalationT106831 general rules
- Exploiting CVE-2019-1388criticalstable
- Audit CVE Eventcriticaltest
- HackTool - SysmonEOP Executioncriticaltest
- InstallerFileTakeOver LPE CVE-2021-41379 File Create Eventcriticaltest
- Possible Coin Miner CPU Priority Paramcriticaltest
- Potential CVE-2021-41379 Exploitation Attemptcriticaltest
- Potential SystemNightmare Exploitation Attemptcriticaltest
- Sudo Privilege Escalation CVE-2019-14287 - Builtincriticaltest
Create or Modify System ProcessT15439 general rules
- CodeIntegrity - Blocked Driver Load With Revoked Certificatehightest
- CodeIntegrity - Blocked Image/Driver Load For Policy Violationhightest
- KrbRelayUp Service Installationhightest
- PUA - Process Hacker Driver Loadhightest
- Service Installed By Unusual Client - Securityhightest
- Service Installed By Unusual Client - Systemhightest
- PUA - Process Hacker Executionmediumtest
- PUA - System Informer Driver Loadmediumtest
LSASS MemoryT1003.00179 general rules
- Antivirus - Password Dumper Signaturecriticalstable
- APT31 Judgement Panda Activitycriticaltest
- HackTool - Credential Dumping Tools Named Pipe Createdcriticaltest
- HackTool - Dumpert Process Dumper Default Filecriticaltest
- HackTool - Dumpert Process Dumper Executioncriticaltest
- HackTool - Inveigh Executioncriticaltest
- HackTool - SafetyKatz Executioncriticaltest
- HackTool - Windows Credential Editor (WCE) Executioncriticaltest
Sigma rules © SigmaHQ, Detection Rule License 1.1; linked, not reproduced.
What security researchers reported
Not named in any threat report yetAlso mentioned in 50 community threat pulses (AlienVault OTX)
Weaker evidencePulses are indicator collections that anyone can publish. A mention is not confirmation of exploitation.
- Actively_Exploited_Kev | Oct 30, 202629 Oct 2026
- Actively_Exploited_Kev | Oct 29, 202628 Oct 2026
- Actively_Exploited_Kev | Oct 28, 202627 Oct 2026
- Actively_Exploited_Kev | Oct 27, 202626 Oct 2026
- Actively_Exploited_Kev | Oct 24, 202623 Oct 2026
- Actively_Exploited_Kev | Oct 23, 202622 Oct 2026
- 44 more on OTX