A new report from the Acronis Threat Research Unit has uncovered a vulnerability in Microsoft Exchange Online settings that could enable email spoofing attacks.
This issue primarily affects users with a hybrid configuration of on-premises Exchange and Exchange Online, and those utilizing third-party email security solutions. In July 2023, Microsoft introduced a major change in how it handles DMARC (Domain-based Message Authentication, Reporting, and Conformance) within Microsoft Exchange. This update was intended to bolster security by enhancing how email servers verify incoming emails’ legitimacy. Unfortunately, despite clear guidance from Microsoft, a considerable number of users have yet to implement these security measures.
Read more…
Source: TechRadar News
Related:
- Over a million WordPress sites hit in plugin flaw — so patch now or face the consequences
May 14, 2026
A popular WordPress plugin with roughly a million active installations contained two vulnerabilities that could have allowed malicious actors to exfiltrate sensitive data, such as password hashes and other valuable information. Security researchers at Wordfence said they were tipped off by a researcher Rafie Muhammad about the existence of an Arbitrary File Read and an SQL Injection vulnerability in Avada ...
- Patch Tuesday
May 13, 2026
Microsoft is publishing 137 vulnerabilities on May 2026 Patch Tuesday. Microsoft is not aware of exploitation in the wild or public disclosure for any of these vulnerabilities. So far this month, Microsoft has provided patches to address 133 browser vulnerabilities, which are not included in the Patch Tuesday count above. Windows Netlogon: critical RCE Anyone responsible for securing ...
- When IT Support Calls: Dissecting a ModeloRAT Campaign from Teams to Domain Compromise
May 13, 2026
Attackers do not need to break into the front door when they can convince employees to open it for them through the tools they already trust. In April 2026, Rapid7 investigated an enterprise intrusion that began with a Microsoft Teams message from a fake “IT Support” account and quickly escalated into a full compromise chain involving ...
- Yarbo responds to robot flaws that could mow down their owners
May 11, 2026
A researcher found that Yarbo yard robots came with a host of vulnerabilities which, among others, allowed an attacker to harvest WiFi passwords. Security researcher Andreas Makris found he could remotely hijack thousands of Yarbo yard robots worldwide, and proved it by having his mower run him over. The root cause was a cluster of “legacy” design choices: ...
- Adversaries Leverage AI for Vulnerability Exploitation, Augmented Operations, and Initial Access
May 11, 2026
Since our February 2026 report on AI-related threat activity, Google Threat Intelligence Group (GTIG) has continued to track a maturing transition from nascent AI-enabled operations to the industrial-scale application of generative models within adversarial workflows. This report, based on insights derived from Mandiant incident response engagements, Gemini, and GTIG’s proactive research, highlights the dual nature ...
- ‘Dirty Frag’ Linux flaw one-ups CopyFail with no patches and public root exploit
May 8, 2026
Broken disclosure embargo left admins facing a fresh root-level flaw with no CVE A fresh Linux privilege escalation bug dubbed “Dirty Frag” has dropped into the wild with no patches, no CVE, and a public exploit that hands attackers root access across major distributions.Security researcher Hyunwoo Kim disclosed the local privilege escalation flaw on Friday after what he ...