Actively Exploited SharePoint and SMA1000 Zero-Days Lead the Week

Remote code execution in Microsoft SharePoint (Enterprise Server 2016, Server 2019, and Server Subscription Edition) allows an unauthenticated network attacker to run arbitrary code on the server by submitting maliciously crafted serialized data (CWE-502). The CVSS 3.1 base score is 9.8 with a fully remote, no-interaction, no-privilege vector (AV:N/AC:L/PR:N/UI:N), placing it among the most severe SharePoint flaws. There is no public exploit identified at time of analysis and it is not listed in CISA KEV, but insecure-deserialization RCE in SharePoint has historically been a high-value target for rapid weaponization.

Privilege elevation in Microsoft SharePoint Server (Enterprise Server 2016, Server 2019, and Subscription Edition) lets an unauthenticated network attacker reach a security-critical function that lacks any authentication check (CWE-306), gaining elevated privileges on the target farm. The flaw is confirmed actively exploited (CISA KEV) with publicly available exploit code, and its CVSS 3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N) reflects fully remote, unauthenticated exploitation with high confidentiality, integrity, and availability impact. Microsoft has released a patch via MSRC.

Server-side request forgery in the SonicWall SMA1000 Appliance Work Place interface lets remote, unauthenticated attackers (PR:N) coerce the appliance into issuing attacker-controlled requests to unintended internal or external destinations. It is confirmed actively exploited (CISA KEV), publicly available exploit code exists, and it carries a maximal CVSS 10.0 with a scope change, making internet-facing SMA1000 appliances a high-priority patch. EPSS is modest at 1.40% (69th percentile), which alongside KEV points to targeted rather than mass-scanning exploitation so far.

Post-authentication OS command execution in the SonicWall SMA1000 Appliance Management Console (AMC) allows a remote attacker holding administrator credentials to inject and run arbitrary operating-system commands on the appliance under specific conditions. It affects SMA1000 firmware branches 12.4.3 and 12.5.0, is confirmed actively exploited (CISA KEV), and has publicly available exploit code, though the EPSS probability sits at a moderate 1.65% (74th percentile), consistent with targeted rather than mass exploitation. Successful abuse yields total control of the management plane of an internet-facing remote-access appliance.

Local privilege escalation in Microsoft Active Directory Federation Services (AD FS) lets an already-authenticated low-privileged user on the host gain higher privileges due to insufficient granularity of access control (CWE-1220). Affected deployments span AD FS on Windows Server 2012 through Windows Server 2025, and the flaw carries a CVSS 7.8 with high confidentiality, integrity, and availability impact. There is no public exploit identified at time of analysis and it is not listed in CISA KEV, so this is a patch-priority-driven rather than exploitation-driven risk.

Remote code execution in Microsoft SharePoint Server (2016, 2019, and Subscription Edition) lets an unauthenticated attacker run arbitrary code by sending a crafted serialized payload over the network. The flaw is an untrusted-data deserialization (CWE-502) rated CVSS 9.8 with PR:N/UI:N, meaning no credentials or user interaction are required. No public exploit identified at time of analysis, but the pre-auth network vector and SharePoint's long history as an attacker target make this a high-priority patch.

Security feature bypass in Microsoft SharePoint (Enterprise Server 2016, Server 2019, and Server Subscription Edition) lets a network-based, unauthenticated attacker defeat a weak-authentication protection mechanism (CWE-1390) to gain high-impact access to confidentiality and integrity. Rated CVSS 9.1 with no attacker privileges or user interaction required, this is a serious pre-authentication issue in a widely deployed collaboration platform. Microsoft has published a fix, and there is no public exploit identified at time of analysis.

Local privilege escalation in the Microsoft Windows Kernel allows an unauthorized attacker to gain elevated (SYSTEM-level) privileges by triggering a use-after-free condition (CWE-416) in kernel memory. The flaw affects a broad range of supported Windows client and server releases, from Windows 10 1607 and Windows Server 2012 through Windows 11 26H1 and Windows Server 2025. Microsoft has released a patch; there is no public exploit identified at time of analysis and the issue is not listed in CISA KEV.