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Microsoft has fixed a flaw in its Authenticator app for Android that let a malicious app with no permissions pose as a trusted Microsoft app, such as Teams, and collect sign-in tokens for a victim's work account. Microsoft tracks the flaw as  CVE-2026-80097  and fixed it in Authenticator for Android version 6.2606.4246, so anyone using the app should update. In the researchers' tests, the tokens gave full access to the account's email, files, and calendar. Microsoft says exploitation also needs the victim to complete a sign-in step in Authenticator, and that the flaw has not been used in attacks. The research comes from Ofek Levin, working through a fellowship program at the security firm  Enclave , which published the technical details on October 23, 2026. Microsoft assigned the CVE on September 8 and rated it 8.6 on the CVSS scale, which it labels "Important." On Android, Authenticator does more than show six-digit codes. It also acts as a broker: when ...

Microsoft has said that it's ending support for passwords in its Authenticator app starting August 1, 2025. Microsoft’s move is part of a much larger shift away from traditional password-based logins. The company said the changes are also meant to streamline autofill within its two-factor authentication (2FA) app, making the experience simpler and more secure. Over the past few years, Microsoft has been pushing for a passwordless future using technologies like passkeys , Windows Hello, and FIDO2-based authentication. These methods offer better protection against phishing and password reuse, which are still major attack vectors. While it may feel like a hassle at first, this change is actually aimed at reducing your risk in the long run. "Starting July 2025, the autofill feature in Authenticator will stop working, and from August 2025, passwords will no longer be accessible in Authenticator," Microsoft said in a support document for Authenticator. It's worth noti...

Microsoft today launched a new bug bounty program for bug hunters and researchers finding security vulnerabilities in its "identity services." Hacking into networks and stealing data have become common and easier than ever but not all data holds the same business value or carries the same risk. Since new security today depends on the collaborative communication of identities and identity data within, and across domains, digital identities of customers are usually the key to accessing services and interacting across the Internet. Microsoft said the company has heavily invested in the "creation, implementation, and improvement of identity-related specifications" that encourage "strong authentication, secure sign-on, sessions, API security, and other critical infrastructure tasks." Therefore, to further bolster its customers' security, the tech giant has launched an all-new, and independent bug bounty program. Dubbed Microsoft Identity Bounty ...

Microsoft on Wednesday announced a new passwordless mechanism that allows users to access their accounts without a password by using Microsoft Authenticator, Windows Hello, a security key, or a verification code sent via SMS or email. The change is expected to be rolled out in the coming weeks. "Except for auto-generated passwords that are nearly impossible to remember, we largely create our own passwords,"  said  Vasu Jakkal, Microsoft's corporate vice president for Security, Compliance, and Identity. "But, given the vulnerability of passwords, requirements for them have gotten increasingly complex in recent years, including multiple symbols, numbers, case sensitivity, and disallowing previous passwords." "Passwords are incredibly inconvenient to create, remember, and manage across all the accounts in our lives," Jakkal added. Over the years, weak passwords have emerged as the entry point for a vast majority of attacks across enterprise and cons...

A fake LastPass Authenticator installer offered on GitHub installs a Windows kernel driver that shuts off antivirus and other security software before a password stealer runs if a victim downloads and runs it, researchers at LastPass and Delphos Labs said on September 17. Microsoft's own hardware-compatibility program signs the driver, scored zero detections on VirusTotal when researchers checked it in August, and was not on Microsoft's list of blocked drivers. LastPass says none of its own systems, services, or customer vaults were touched, and that the attackers only borrowed its name. The lure is a fake GitHub page (github.com/LastPass-Authenticator) that ranks in search results for terms like "LastPass Authenticator download" and looks like a real LastPass product page. Clicking the download button sends the visitor through several GitHub pages to an attacker server, which serves a large ZIP file. The real LastPass Authenticator comes from lastpass.com and ...

Microsoft on Wednesday disclosed that it identified a set of highly targeted social engineering attacks mounted by a Russian nation-state threat actor using credential theft phishing lures sent as Microsoft Teams chats. The tech giant attributed the attacks to a group it tracks as  Midnight Blizzard  (previously Nobelium). It's also called APT29, BlueBravo, Cozy Bear, Iron Hemlock, and The Dukes. "In this latest activity, the threat actor uses previously compromised Microsoft 365 tenants owned by small businesses to create new domains that appear as technical support entities," the company  said . "Using these domains from compromised tenants, Midnight Blizzard leverages Teams messages to send lures that attempt to steal credentials from a targeted organization by engaging a user and eliciting approval of multi-factor authentication (MFA) prompts." Microsoft said the campaign, observed since at least late May 2023, affected less than 40 organizations global...

An attacker running a live Microsoft 365 phishing operation left a Python web server listening on a public port with directory listing switched on. The command that did it:  python3 -m http.server 8080 , was still sitting in the readable  .bash_history . From that one lapse, French security firm  Lexfo  lifted the operator's entire toolkit and pivoted through it to two more phishing operators, three campaigns in all. Each ran a custom fork of the open-source Evilginx proxy , cloned from public GitHub. The largest of the three had been running for more than a year, its victims overwhelmingly corporate mailboxes. The three got past MFA in two mechanically different ways, one by proxying the live login , one by abusing a legitimate Microsoft sign-in flow. The two need different defenses, which is the part that matters most if you run Microsoft 365. Directory listing on a working attack server is close to a full confession. The listing exposed phishing conf...

A threat actor has been targeting organizations spanning multiple sectors with voice-based fake security requests that prompt Microsoft 365 users to enroll a new Entra passkey with an aim to carry out data extortion attacks. The threat actor, tracked by Okta under the moniker O-UNC-066 , has deployed a panel-controlled phishing kit that's capable of targeting the passkey enrollment process . The activity has singled out food and beverage, technology, healthcare, automotive, construction, and aviation industries. "The threat actor registers domains that incorporate the word passkey as part of a voice-enabled phishing ('vishing') scheme," Okta researcher Houssem Eddine Bordjiba said . "The threat actor then calls targeted users on the phone in an attempt to persuade them that they need to register a new passkey." Users are then directed to a phishing kit that's identical to the Microsoft passkey enrollment process, giving the impression that th...

Microsoft on Tuesday broke Patch Tuesday records by addressing an earth-shattering 974 vulnerabilities spanning its software portfolio, including two flaws that it said have been actively exploited in the wild. These include 723 flaws in Windows, 111 in Office and Office 2016, 62 in SQL, and 22 in Developer Tools. Of these, over 110 shortcomings have been assigned a critical severity rating. Three prominent vulnerability types, namely privilege escalation, remote code execution, and information disclosure, account for nearly 90% of the flaws patched this month. Along with Microsoft's fixes for 25 non-Microsoft CVEs, the update brings the total number of vulnerabilities resolved to 999. September's record-setting security updates come after Microsoft patched 457 vulnerabilities in August, 663 in July , 220 in June , and 161 in May . "At this scale, the challenge is not simply getting through the patch list but knowing what needs attention first," Jack Bicer...

Microsoft on Tuesday released its monthly security update,  addressing 61 different security flaws  spanning its software, including two critical issues impacting Windows Hyper-V that could lead to denial-of-service (DoS) and remote code execution. Of the 61 vulnerabilities, two are rated Critical, 58 are rated Important, and one is rated Low in severity. None of the flaws are listed as publicly known or under active attack at the time of the release, but six of them have been tagged with an "Exploitation More Likely" assessment. The fixes are in addition to  17 security flaws  that have been patched in the company's Chromium-based Edge browser since the release of the  February 2024 Patch Tuesday updates . Topping the list of critical shortcomings are  CVE-2024-21407  and  CVE-2024-21408 , which affect Hyper-V and could result in remote code execution and a DoS condition, respectively. Microsoft's update also addresses privilege escalation f...

Three separate research efforts last week demonstrated ways to defeat passkey protections without breaking the cryptography they rest on. Passkeys are designed to replace reusable passwords and resist phishing. The attacks instead reused signed authentication material that Windows had exposed, abused a cloud-synced passkey system from malware already on the victim's machine, and used a  Windows Hello for Business  key from a compromised user session without a fresh PIN or biometric check. None cracked the math. The impact is not the same in all three cases. SpecterOps showed a Windows and Microsoft Entra ID chain that could impersonate privileged users while satisfying phishing-resistant multifactor authentication (MFA); that chain reused signed authentication material rather than stealing the authenticator's private key. Unit 42 showed attacks against  Google Password Manager in Chrome , including a path that recovers the private keys for a victim's synced p...

Microsoft has disclosed details of two campaigns in which threat actors are abusing third-party email delivery infrastructure to blast financial fraud scam messages and using passkey-themed social engineering to breach cloud environments. The first campaign, per the tech giant, involved sending over a million scam emails between August 3 and 5, 2026, by masquerading as chief executive officers (CEOs) of various target companies, aiming to persuade accounts payable departments at those firms to initiate Automated Clearing House ( ACH ) transfers for a supposed ServiceNow annual subscription. Evidence indicates that the operators behind the campaign have leveraged generative artificial intelligence (AI) to facilitate the creation of email templates and draft emails tailored to their recipients. The activity primarily singled out enterprise users in the U.S., spanning IT services, consumer goods, real estate, and discrete manufacturing sectors. "The campaign follows steps bef...

Cybersecurity researchers have disclosed a Microsoft 365 campaign that has been observed leveraging an adversary-in-the-middle ( AitM ) relay to capture sign-in sessions and then replay the stolen tokens to break into email accounts at 79 organizations. Huntress, which observed the activity between July 14 and September 22, 2026, said it detected 497 successful Microsoft 365 sign-in events across the victim organizations from over 200,000 login attempts, with the attackers ultimately compromising 97 accounts and registering 48 rogue Entra devices. "Rather than guessing passwords, the attacker replayed sign-in tokens stolen from victims, and we've traced more than 200,000 failed login attempts from the campaign window back to the 193.26.115[.]0/24 IP range," Huntress researchers Andrea Hatcher, Susannah Matt, Matt Poto, and Andrew Schwartz said. The attack has been found to employ an AitM login page, which sits between the victims and legitimate Microsoft infrastru...

Cybersecurity isn't just another checkbox on your business agenda. It's a fundamental pillar of survival. As organizations increasingly migrate their operations to the cloud, understanding how to protect your digital assets becomes crucial. The shared responsibility model , exemplified through Microsoft 365's approach, offers a framework for comprehending and implementing effective cybersecurity measures.  The Essence of Shared Responsibility  Think of cloud security like a well-maintained building: the property manager handles structural integrity and common areas, while tenants secure their individual units. Similarly, the shared responsibility model creates a clear division of security duties between cloud providers and their users. This partnership approach ensures comprehensive protection through clearly defined roles and responsibilities.  What Your Cloud Provider Handles  Microsoft maintains comprehensive responsibility for securing the foundational eleme...

A new phishing-as-a-service (PhaaS or PaaS) platform named  Greatness  has been leveraged by cybercriminals to target business users of the Microsoft 365 cloud service since at least mid-2022, effectively lowering the bar to entry for phishing attacks. "Greatness, for now, is only focused on Microsoft 365 phishing pages, providing its affiliates with an attachment and link builder that creates highly convincing decoy and login pages," Cisco Talos researcher Tiago Pereira  said . "It contains features such as having the victim's email address pre-filled and displaying their appropriate company logo and background image, extracted from the target organization's real Microsoft 365 login page." Campaigns involving Greatness have mainly manufacturing, health care, and technology entities located in the U.S., the U.K., Australia, South Africa, and Canada, with a spike in activity detected in December 2022 and March 2023. Phishing kits like Greatness offer t...

Password security has long been an issue for businesses and their cybersecurity standards. Account passwords are often the weakest link in the overall security posture for many organizations. Many companies have used Microsoft's default password policies for decades. While these can be customized, businesses often accept the default values for their organization. The Windows default password policy is a good start, but are there security vulnerabilities associated with it? Let's look at the current recommendations from leading cybersecurity authorities and see how they measure up against the Windows default password policy. Windows default password policy settings Many, if not most, business environments today use Microsoft Active Directory as their identity and access management solution in the enterprise. Active Directory has served organizations in this capacity for decades.  One of the built-in capabilities provided by Microsoft Active Directory Domain Services (ADDS)...

Some attacks take real skill. Others just need someone to leave a door open. This week has both. Exposed passwords, old bugs still getting exploited, and trusted software doing things it shouldn't. There's a strange mix of clever tricks and careless mistakes. Hackers are borrowing trust from familiar apps, websites, and AI tools. Some are using AI to speed things up. Others are leaving their own attack files exposed. Not exactly careful work. Different stories, familiar weak spots. Here's what showed up this week. The threats change every week. Subscribe, and we’ll alert you when each new ThreatsDay Bulletin is out.

During the last week of March, three major tech companies - Microsoft, Okta, and HubSpot - reported significant data breaches. DEV-0537, also known as LAPSUS$, performed the first two. This highly sophisticated group utilizes state-of-the-art attack vectors to great success. Meanwhile, the group behind the HubSpot breach was not disclosed. This blog will review the three breaches based on publicly disclosed information and suggest best practices to minimize the risk of such attacks succeeding against your organization.  HubSpot - Employee Access On March 21, 2022,  HubSpot reported the breach  which happened on March 18. Malicious actors compromised a HubSpot employee account that the employee used for customer support. This allowed malicious actors the ability to access and export contact data using the employee's access to several HubSpot accounts.  With little information regarding this breach, defending against an attack is challenging, but a key configuratio...