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EMERGENCY CVE-2026-20963 9.8 Microsoft Office SharePoint contains a deserialization vulnerability (CVE-2026-20963) that allows authenticated users to execute arbitrary code over the network through crafted serialized objects. KEV-listed with public PoC, this CVSS 8.8 vulnerability enables any SharePoint user to escalate to server-level code execution, making it a critical threat for organizations relying on SharePoint for document management and collaboration. | ACT NOW CVE-2026-20805 5.5 Desktop Windows Manager on Windows 10, Windows 11, and Windows Server 2022 leaks sensitive information to local authenticated users, enabling disclosure of confidential data without modifying or disrupting system functionality. This vulnerability is confirmed actively exploited and affects multiple Windows versions with no patch currently available. An authorized attacker can exploit this with minimal complexity to extract sensitive information from the system. | ACT NOW CVE-2026-22200 7.5 Arbitrary file disclosure in osTicket 1.18.x before 1.18.3 and 1.17.x before 1.17.7 allows unauthenticated attackers to read sensitive server files by injecting malicious PHP filter expressions into ticket descriptions that are processed during PDF export. The vulnerability exploits insufficient sanitization in the mPDF library integration, enabling attackers to embed arbitrary file contents as images in generated PDFs when exporting tickets. Public exploit code exists and the issue affects default configurations where guest ticket creation is enabled. | EMERGENCY CVE-2026-21891 9.4 ZimaOS (fork of CasaOS) through 1.5.0 has an authentication bypass where passwords for system service accounts are not properly validated during login. Attackers can access the system using known service account names with any password. PoC available, EPSS 13.6%. | ACT NOW CVE-2025-66376 7.2 Zimbra Collaboration Suite (ZCS) 10.x contains a stored XSS vulnerability in the Classic UI that allows attackers to execute arbitrary JavaScript through CSS @import directives in HTML emails. KEV-listed, this vulnerability (CVE-2025-66376) enables session hijacking and account takeover when administrators or users view malicious emails, making it a high-value target for email-based espionage campaigns. | ACT NOW CVE-2025-43529 8.8 WebKit arbitrary code execution via use-after-free memory corruption affects Safari 26.2, iOS/iPadOS 18.7.3 through 26.2, macOS Tahoe 26.2, tvOS 26.2, visionOS 26.2, and watchOS 26.2, allowing remote attackers to execute arbitrary code by convincing users to visit malicious websites. This vulnerability is confirmed actively exploited (CISA KEV) in extremely sophisticated targeted attacks against specific individuals on iOS versions prior to iOS 26, per Apple's security bulletin. EPSS score of 0.12% (32nd percentile) significantly understates real-world risk given confirmed exploitation. Related vulnerability CVE-2025-14174 was issued for the same exploitation campaign, suggesting a complex attack chain targeting Apple ecosystem users. |

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