On-Prem Microsoft Exchange Server CVE-2026-42897 Exploited via Crafted Email
Microsoft has disclosed a new security vulnerability impacting on-premise versions of Exchange Server that it said has come under active exploitation in the wild
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Background for this topic.
Spoofing is a deceptive practice where an individual or program masquerades as a legitimate entity within a communication system. In the realm of information security, spoofing is a significant issue, because attackers often use it to gain unauthorized access to systems and networks.
There are various types of spoofing attacks, including but not limited to email spoofing, caller ID spoofing, IP address spoofing, and website spoofing. In each case, the attacker forges the header or address information to appear as a trusted source, thereby tricking users, systems, or networks into divulging sensitive information, granting access, or redirecting traffic. This can lead to data breaches, financial theft, and the spread of malware.
For instance, email spoofing might involve an attacker sending messages that appear to come from a known contact, enticing the recipient to reveal personal details or click on malicious links. Similarly, IP spoofing involves the creation of internet packets with a forged IP address to disguise the attacker's identity or to impersonate another computing system.
Mitigating spoofing attacks typically involves the use of authentication protocols, encryption, and network security tools that can detect and prevent unauthorized access. Users are also encouraged to be vigilant and to verify the authenticity of communications, especially when sensitive information is involved.
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Microsoft has disclosed a new security vulnerability impacting on-premise versions of Exchange Server that it said has come under active exploitation in the wild
Microsoft on Monday revised its advisory for a now-patched, high-severity security flaw impacting Windows Shell to acknowledge that it has been actively exploited in the wild
Grafana Labs is warning of a maximum severity vulnerability (CVE-2025-41115) in its Enterprise product that can be exploited to treat new users as administrators or for privilege escalation. [...]
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Wednesday added two security flaws impacting TP-Link wireless routers to its Known Exploited Vulnerabilities (KEV) catalog, noting that there is evidence of them being exploited in the wild
A recently fixed "Windows MSHTML spoofing vulnerability" tracked under CVE-2024-43461 is now marked as previously exploited after it was used in attacks by the Void Banshee APT hacking group. [...]
The security flaw tracked as CVE-2022-30216 could allow attackers to perform server spoofing or trigger authentication coercion on the victim.