CISA Issues Emergency Directive on In-the-Wild Microsoft Exchange Flaws

Following Microsoft's release of out-of-band patches to address multiple zero-day flaws in on-premises versions of Microsoft Exchange Server, the U.S. Cybersecurity and Infrastructure Security Agency CISA has issued an emergency directive warning of "active exploitation" of the vulnerabilities. T...

Mass Exploitation of Exchange Server Zero-Day CVEs: What You Need to Know

On March 2, 2021, the Microsoft Threat Intelligence Center MSTIC released details on an active state-sponsored threat campaign exploiting four zero-day vulnerabilities in on-premises instances of Microsoft Exchange Server. MSTIC attributes this campaign to HAFNIUM, a group “assessed to be...

Microsoft Exchange 0-Day Attackers Spy on U.S. Targets

Microsoft has spotted multiple zero-day exploits in the wild being used to attack on-premises versions of Microsoft Exchange Server. Adversaries have been able to access email accounts, steal a raft of data and drop malware on target machines for long-term remote access, according to the computin...

Patch now! Exchange servers attacked by Hafnium zero-days

Microsoft has detected multiple zero-day exploits being used to attack on-premises versions of Microsoft Exchange Server in limited and targeted attacks. Microsoft attributes the attacks to a group they have dubbed Hafnium. “HAFNIUM primarily targets entities in the United States across a number ...

URGENT — 4 Actively Exploited 0-Day Flaws Found in Microsoft Exchange

Microsoft has released emergency patches to address four previously undisclosed security flaws in Exchange Server that it says are being actively exploited by a new Chinese state-sponsored threat actor with the goal of perpetrating data theft. Describing the attacks as "limited and targeted,"...

New Chrome 0-day Bug Under Active Attacks – Update Your Browser ASAP!

Exactly a month after patching an actively exploited zero-day flaw in Chrome, Google today rolled out fixes for yet another zero-day vulnerability in the world's most popular web browser that it says is being abused in the wild. Chrome 89.0.4389.72, released by the search giant for Windows, Mac,...

New Chrome 0-day Bug Under Active Attacks – Update Your Browser ASAP!

Exactly a month after patching an actively exploited zero-day flaw in Chrome, Google today rolled out fixes for yet another zero-day vulnerability in the world's most popular web browser that it says is being abused in the wild. Chrome 89.0.4389.72, released by the search giant for Windows, Mac,...

Rapid7’s InsightIDR Enables Detection And Response to Microsoft Exchange Zero-Day

Starting February 27, 2021, Rapid7 has observed a notable increase in the exploitation of Microsoft Exchange through existing detections in InsightIDR’s Attacker Behavior Analytics ABA. The Managed Detection and Response MDR identified multiple, related compromises in the past 72 hours. In most...

Microsoft: Chinese Cyberspies Used 4 Exchange Server Flaws to Plunder Emails

Microsoft Corp. today released software updates to plug four security holes that attackers have been using to plunder email communications at companies that use its Exchange Server products. The company says all four flaws are being actively exploited as part of a complex attack chain deployed by...

Multiple Microsoft Exchange zero-day vulnerabilities - ProxyLogon Exploit Chain

Microsoft Exchange Server Remote Code Execution Vulnerability Recent assessments: ccondon-r7 at March 03, 2021 4:10pm UTC reported: Microsoft released details on an active state-sponsored threat campaign attributed to HAFNIUM that is exploiting on-prem Exchange Server installations. Microsoft’s...

Hackers Exploit Accellion Zero-Days in Recent Data Theft and Extortion Attacks

Cybersecurity researchers on Monday tied a string of attacks targeting Accellion File Transfer Appliance FTA servers over the past two months to data theft and extortion campaign orchestrated by a cybercrime group called UNC2546. The attacks, which began in mid-December 2020, involved exploiting...

Hackers Exploit Accellion Zero-Days in Recent Data Theft and Extortion Attacks

Cybersecurity researchers on Monday tied a string of attacks targeting Accellion File Transfer Appliance FTA servers over the past two months to data theft and extortion campaign orchestrated by a cybercrime group called UNC2546. The attacks, which began in mid-December 2020, involved exploiting...

Accellion FTA Zero-Day Attacks Tied to Clop, FIN11

Researchers have identified a set of threat actors dubbed UNC2546 and UNC2582 with connections to the FIN11 and the Clop ransomware gang as the cybercriminal group behind the global zero-day attacks on users of the Accellion legacy File Transfer Appliance product. Click to Register Multiple...

Cyber Criminals Exploit Accellion FTA for Data Theft and Extortion

Starting in mid-December 2020, malicious actors that Mandiant tracks as UNC2546 exploited multiple zero-day vulnerabilities in Accellion’s legacy File Transfer Appliance FTA to install a newly discovered web shell named DEWMODE. The motivation of UNC2546 was not immediately apparent, but starting...

Exploit Details Emerge for Unpatched Microsoft Bug

New details have emerged about an unpatched security vulnerability in Microsoft’s Internet Explorer that was recently used in a complex campaign against security researchers. A fresh analysis from 0patch offers further insight into where the bug exists and how it can be triggered in real-world...

Malvertisers Exploited WebKit 0-Day to Redirect Browser Users to Scam Sites

A malvertising group known as "ScamClub" exploited a zero-day vulnerability in WebKit-based browsers to inject malicious payloads that redirected users to fraudulent websites gift card scams. The attacks, first spotted by ad security firm Confiant in late June 2020, leveraged a bug CVE-2021–1801...

On Vulnerability-Adjacent Vulnerabilities

At the virtual Enigma Conference, Googles Project Zeros Maggie Stone gave a talk about zero-day exploits in the wild. In it, she talked about how often vendors fix vulnerabilities only to have the attackers tweak their exploits to work again. From a MIT Technology Review article: Soon after they...

Singtel Suffers Zero-Day Cyberattack, Damage Unknown

Singtel, Tier 1 telecom carrier throughout Asia and owner of Australian telco Optus, has been impacted by a software security hole in a third-party file transfer appliance targeted by attackers. Singtel is one of multiple organizations affected by the bug, including an Australian medical research...

Microsoft Issues Patches for In-the-Wild 0-day and 55 Others Windows Bugs

Microsoft on Tuesday issued fixes for 56 flaws, including a critical vulnerability that's known to be actively exploited in the wild. In all, 11 are listed as Critical, 43 are listed as Important, and two are listed as Moderate in severity — six of which are previously disclosed vulnerabilities...

Microsoft Issues Patches for In-the-Wild 0-day and 55 Others Windows Bugs

Microsoft on Tuesday issued fixes for 56 flaws, including a critical vulnerability that's known to be actively exploited in the wild. In all, 11 are listed as Critical, 43 are listed as Important, and two are listed as Moderate in severity — six of which are previously disclosed vulnerabilities...