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Threat intelligence API
Get started
Live feed
Recipes
Free feeds
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The data
Incident records
Dark web
Validated IOCs
Vulnerabilities
Entity graph
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For service providers
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Back
UnDefend
Vulnerability
Threat entity extracted from intelligence sources
Entities
›
vulnerability
›
UnDefend
Frequency
38
occurrences
First Seen
April 17, 2026
Last Seen
September 23, 2026
API
Overview
Recent Events
Profile
Profile
MITRE ATT&CK
1 / 2
Exploited By
Chaotic Eclipse
Fancy Bear
Uac-0001
APT28
Associated Malware
BigDiskBuster
BeigeBurrow
Closedquorum
FunnyApp
Tools Used
MRT.exe
PowerShell
BitUnlocker
Cloud Filter API
Nightmare-Eclipse
OneDrive
SandboxEscaper
VMware
Related CVEs
CVE-2026-33825
CVE-2026-45585
CVE-2026-45498
CVE-2026-50656
CVE-2026-41091
CVE-2026-45586
CVE-2026-49160
CVE-2026-50507
MITRE Techniques
T1068 - Exploitation for Privilege Escalation
T1003 - OS Credential Dumping
T1059 - Command and Scripting Interpreter
T1547 - Boot Or Logon Autostart Execution
T1486 - Data Encrypted for Impact
T1071 - Application Layer Protocol
T1059.001 - PowerShell
T1055 - Process Injection
Campaigns
Nightmare
Affected Platforms
Windows
BitLocker
Windows Defender
Microsoft Defender
Windows 11
Ctfmon
Regions
Belgium
China
Portugal
Russia
Singapore
Sectors Affected
Finance
Government
Healthcare
-
REC
Recon
No techniques detected
-
RD
Resource Dev
No techniques detected
2
IA
Initial Access
T1566 - Phishing
T1133 - External Remote Services
2
EX
Execution
T1059 - Command and Scripting Interpreter
T1203 - Exploitation for Client Execution
1
PE
Persistence
T1547 - Boot Or Logon Autostart Execution
3
PE
Priv Esc
T1068 - Exploitation for Privilege Escalation
T1055 - Process Injection
T1548.002 - Bypass User Account Control
2
DE
Defense Evasion
T1112 - Modify Registry
T1562.001 - Disable Or Modify Tools
1
CA
Cred Access
T1003 - OS Credential Dumping
-
DI
Discovery
No techniques detected
1
LM
Lateral Mov
T1021 - Remote Services
-
CO
Collection
No techniques detected
1
C2
C2
T1071 - Application Layer Protocol
1
EX
Exfil
T1567.002 - Exfiltration to Cloud Storage
1
IM
Impact
T1486 - Data Encrypted for Impact
16
techniques detected across
10
tactics
Related Clusters (7)
Nightmare-Eclipse Tools Exploit FortiGate VPNs in Live Attacks
Apr 22
·
2 sources
74
Microsoft June 2026 Patch Tuesday: Record 206 Vulnerabilities Addressed
Jun 9
·
36 sources
71
MiniPlasma Zero-Day Exploit Grants SYSTEM Access on Patched Windows Systems
May 18
·
17 sources
70
Nightmare-Eclipse Banned from GitHub and GitLab for Zero-Day Exploits
May 27
·
86 sources
68
Critical RCE Vulnerability in BeyondTrust Software Requires Immediate Patching
Feb 9
·
860 sources
67
BlueHammer Zero-Day Exploit Released, Exposing Windows Users to Privilege Escalation
Apr 7
·
86 sources
67
New BigDiskBuster Zero-Day Blocks Microsoft Defender Updates
Sep 22
·
7 sources
55
Prev
1 / 2
Next
Related Articles (38)
Chaotic Eclipse Released BigDiskBuster, A PoC For Windows Defender Update DoS Zero
Securityaffairs
·
Sep 23
New Microsoft Defender Zero
Linkedin
·
Sep 22
NightmareEclipse's latest zero
Theregister
·
Sep 22
Researcher Drops BigDiskBuster Zero
Thehackernews
·
Sep 22
A Shared Responsibility Protecting Customers Through Coordinated Vulnerability Disclosure
www.microsoft.com
·
Sep 22
New Windows Defender zero-day blocks Microsoft antivirus updates
Bleepingcomputer
·
Sep 22
Microsoft
Theregister
·
Aug 12
Microsoft
Theregister
·
Aug 12
New Microsoft Defender 'ShieldBreak' zero
Bleepingcomputer
·
Aug 12
Defender Zero
Techtimes
·
Jul 9
Microsoft releases patch for Defender zero
Feeds.Feedburner
·
Jul 9
RoguePlanet Zero-Day: Microsoft releases new Windows patch
Heise.De
·
Jul 9
Nightmare-Eclipse Drops Yet Another Microsoft Exploit, RoguePlanet
Darkreading
·
Jun 10
Microsoft June 2026 Patch Tuesday fixes 5 zero-days, 200 flaws
Bleepingcomputer
·
Jun 9
Microsoft June 2026 Patch Tuesday fixes 6 zero-days, 200 flaws
Bleepingcomputer
·
Jun 9
Microsoft June 2026 Patch Tuesday fixes 3 zero-day, 200 flaws
Bleepingcomputer
·
Jun 9
VS Code zero
Bleepingcomputer
·
Jun 3
Critical Windows Netlogon RCE flaw now exploited in attacks
Bleepingcomputer
·
Jun 1
Critical Windows Netlogon RCE flaw now exploited in attacks
Bleepingcomputer
·
Jun 1
Disgruntled 0-Day Hunter Promises 'Bone Shattering Drop' as Redmond Calls Police
Gadgetreview
·
May 29
Too many zero-days: Microsoft threatens legal action
Heise.De
·
May 29
Microsoft's Security Team Published an Article Criticizing Researchers for Prematurely Disclosing Vulnerabilities, but Did Not Address the Conflict with the Researchers.
unsafe.sh
·
May 29
Six Zero-Days Revealed in Six Weeks: Microsoft Responds with Threat
www.heise.de
·
May 29
A Shared Responsibility Protecting Customers Through Coordinated Vulnerability Disclosure
www.microsoft.com
·
May 28
Disgruntled 0-day hunter 'humiliated' by Microsoft pledges 'bone shattering drop' as Redmond calls cops
Theregister
·
May 28
A shared responsibility: Protecting customers through Coordinated Vulnerability Disclosure
Microsoft
·
May 27
Picus Security: BlueHammer & RedSun
www.picussecurity.com
·
May 21
Microsoft Defender Zero-Day Vulnerabilities RedSun and UnDefend Actively Exploited ...
Rescana
·
May 21
Windows vulnerabilities: BitLocker problem and privilege escalation
Heise.De
·
May 19
'The exact same issue that was reported to Microsoft…
Inkl
·
May 18
MiniPlasma zero-day gives SYSTEM access on fully patched Windows 11
Notebookcheck
·
May 18
‘Patched’ Windows bug resurfaces 6 years later as working SYSTEM
Csoonline
·
May 18
Mystery Microsoft bug leaker keeps the zero
Theregister
·
May 13
“Dirty Frag”: Linux flaws grant root access
Heise.De
·
May 8
CISA orders feds to patch Windows flaw exploited as zero
Bleepingcomputer
·
Apr 29
Nightmare-Eclipse PoC Used in Real-World Attacks
Socprime
·
Apr 22
Hackers Use Nightmare
Cybersecuritynews
·
Apr 21
Researcher drops two more Microsoft Defender zero-days, all three now exploited in the wild
Feeds2.Feedburner
·
Apr 17
Prev
1 / 8
Next
Related Entities
Chaotic Eclipse
Fancy Bear
Uac-0001
APT28
Zero-day Exploit
DDoS
Malware
Ransomware
Phishing
Data Breach
Nightmare
Microsoft
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