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Security Affairs newsletter Round 532 by Pierluigi Paganini – INTERNATIONAL EDITION

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Microsoft Exchange

Pierluigi Paganini March 30, 2024
German BSI warns of 17,000 unpatched Microsoft Exchange servers

The German Federal Office for Information Security (BSI) warned of thousands of Microsoft Exchange servers in the country vulnerable to critical flaws. The German Federal Office for Information Security (BSI) issued an alert about at least 17,000 Microsoft Exchange servers in the country that are vulnerable to one or more critical vulnerabilities. The BSI also added […]

Pierluigi Paganini February 21, 2024
Microsoft Exchange flaw CVE-2024-21410 could impact up to 97,000 servers

Researchers from Shadowserver Foundation identified roughly 28,000 internet-facing Microsoft Exchange servers vulnerable to CVE-2024-21410. The vulnerability CVE-2024-21410 is a bypass vulnerability that can be exploited by an attacker to bypass the SmartScreen user experience and inject code to potentially gain code execution, which could lead to some data exposure, lack of system availability, or both. […]

Pierluigi Paganini February 16, 2024
CISA adds Microsoft Exchange and Cisco ASA and FTD bugs to its Known Exploited Vulnerabilities catalog

U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds Microsoft Exchange and Cisco ASA and FTD bugs to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added the following two vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog: The vulnerability CVE-2020-3259 is an information disclosure issue that resides in the web services […]

Pierluigi Paganini November 03, 2023
ZDI discloses four zero-day flaws in Microsoft Exchange

Researchers disclosed four zero-day flaws in Microsoft Exchange that can be remotely exploited to execute arbitrary code or disclose sensitive information on vulnerable installs. Trend Micro’s Zero Day Initiative (ZDI) disclosed four zero-day vulnerabilities in Microsoft Exchange that can be remotely exploited by an authenticated attacker to execute arbitrary code or disclose sensitive information on […]

Pierluigi Paganini August 13, 2023
The DHS’s CSRB to review cloud security practices following the hack of Microsoft Exchange govt email accounts

The DHS’s CSRB will review cloud security practices following recent hacks of Microsoft Exchange accounts used by US govt agencies. The US DHS announced that the Cyber Safety Review Board (CSRB) will review the security measure to protect cloud computing environments following the recent compromise of Microsoft Exchange accounts used by US govt agencies. “The […]

Pierluigi Paganini January 27, 2023
Patch management is crucial to protect Exchange servers, Microsoft warns

Microsoft warns customers to patch their Exchange servers because attackers always look to exploit unpatched installs. Microsoft published a post to urge its customers to protect their Exchange servers because threat actors actively attempt to exploit vulnerabilities in unpatched installs. The IT giant recommends installing the latest available Cumulative Update (CU) and Security Update (SU) […]

Pierluigi Paganini December 21, 2022
Play ransomware attacks use a new exploit to bypass ProxyNotShell mitigations on Exchange servers

Play ransomware attacks target Exchange servers with a new exploit that bypasses Microsoft’s ProxyNotShell mitigations. Play ransomware operators target Exchange servers using a new exploit chain, dubbed OWASSRF by Crowdstrike, that bypasses Microsoft’s mitigations for ProxyNotShell vulnerabilities. The ProxyNotShell flaws are: they impact Exchange Server 2013, 2016, and 2019, an authenticated attacker can trigger them […]

Pierluigi Paganini November 20, 2022
PoC exploit code for ProxyNotShell Microsoft Exchange bugs released online

Proof-of-concept exploit code for two actively exploited Microsoft Exchange ProxyNotShell flaws released online. Proof-of-concept exploit code has been released online for two actively exploited vulnerabilities in Microsoft Exchange, known as ProxyNotShell. The two flaws are: they impact Exchange Server 2013, 2016, and 2019, an authenticated attacker can trigger them to elevate privileges to run PowerShell […]

Pierluigi Paganini October 04, 2022
Microsoft mitigations for recently disclosed Exchange zero-days can be easily bypassed

The mitigation shared by Microsoft for the two recently disclosed Exchange zero-day vulnerabilities can be bypassed, expert warns. Last week, Microsoft confirmed that two zero-day vulnerabilities in Microsoft Exchange recently disclosed by researchers at cybersecurity firm GTSC are being actively exploited in the wild. The first flaw, tracked as CVE-2022-41040, is a Server-Side Request Forgery (SSRF) issue. […]

Pierluigi Paganini September 30, 2022
Unpatched Microsoft Exchange Zero-Day actively exploited in the wild

Security researchers are warning of a new Microsoft Exchange zero-day that are being exploited by malicious actors in the wild. Cybersecurity firm GTSC discovered two Microsoft Exchange zero-day vulnerabilities that are under active exploitation in attacks in the wild. Both flaws were discovered by the researchers as part of an incident response activity in August […]

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    recent articles

    Android Malware Konfety evolves with ZIP manipulation and dynamic loading

    Malware / July 15, 2025

    Belk hit by May cyberattack: DragonForce stole 150GB of data

    Data Breach / July 15, 2025

    North Korea-linked actors spread XORIndex malware via 67 malicious npm packages

    Hacking / July 15, 2025

    FBI seized multiple piracy sites distributing pirated video games

    Cyber Crime / July 15, 2025

    An attacker using a $500 radio setup could potentially trigger train brake failures or derailments from a distance

    Hacking / July 15, 2025

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