InfoSecBulletin Cybersecurity for mankind
Check Point Research warns of the active exploitation of a new vulnerability, CVE-2025-24054, which lets hackers leak NTLMv2-SSP hashes using specially crafted .library-ms files. Microsoft patched this vulnerability on March 11, 2025. It affects all supported Windows versions and has been weaponized less than two weeks after its disclosure.
Daily Cyber security update for 14.11. 2026
Huge European telecom leak exposes clients of Swedbank, SEB, airBaltic, and other companies
PHP2Shell attack exploited a Check Point 0-day to deploy malware
North Korean hackers steal more than $400 million using video images, FBI says
Microsoft’s November 2026 Patch Tuesday addresses 1,093 flaws, with Outlook zero-day
Barracuda ESG flaws exploited, gaining root access
Apple, SAP, and Ivanti Patch Critical flaws Affecting Messaging, Bluetooth, and Enterprise Systems
Jailbroken DeepSeek AI Agent Conducts Two-Week Cyberattack on European Telecom
Daily Cyber security update for 10.11. 2026
IBM fixes 208 API Connect vulnerabilities, 47 critical
The flaw enables NTLM hash disclosure via spoofing and is triggered simply by interacting with a malicious .library-ms file. “This event will trigger Windows Explorer to initiate an SMB authentication request to a remote server and, as a result, it leaks the user’s NTLM hash without any user interaction,” the report states.
CVE-2025-24054 can be exploited through passive actions like right-clicking, dragging, or simply opening the folder with the malicious file, unlike traditional attacks that need users to open or execute files.
Despite Microsoft’s timely patch, attackers moved quickly. “Threat actors began actively exploiting CVE-2025-24054 just eight days after the patch was released,” Check Point confirmed.
The NTLM Exploits Bomb campaign was first detected around March 20–21, 2025, targeting government and private organizations in Poland and Romania. Victims received malicious Dropbox-hosted archives, which, when extracted, leaked NTLM hashes to attacker-controlled SMB servers in Russia, Bulgaria, the Netherlands, Australia, and Turkey.
Mitigations:
Microsoft’s prompt patching of CVE-2025-24054 was a crucial step; however, the rapid exploitation indicates that organizations must act swiftly to mitigate risks. Key recommendations include:
Apply patches: Update all affected systems with the latest security patches.
Strengthen network defenses: Use SMB signing, relay protections, and monitor SMB traffic for unusual activity.
Raise user awareness: Educate users on the dangers of untrusted archives and suspicious files.
Segment the network: Limit SMB traffic between segments to minimize risk.
Perform regular audits: Conduct vulnerability assessments and monitor for compromises.
