SharePoint Server

Related CVEsby mentions

• CVE-2026-338249.873%
  Unauthenticated Double-Free RCE in Microsoft Windows IKE Extension
  A double-free memory-corruption flaw (CWE-415) in the Microsoft Windows Internet Key Exchange (IKE) service extension allows a remote, unauthenticated attacker to trigger the bug with crafted network traffic, with no privileges or user interaction required. Successful exploitation yields remote code execution with full system impact, reflected in the critical 9.8 CVSS score (high confidentiality, integrity, and availability). The vulnerable IKE component is present in Windows 10 (1607, 1809, 21H2, 22H2), Windows 11 (23H2, 24H2, 25H2, 26H1), and Windows Server 2016, 2019, and 2022 (including 23H2), which ship it as a built-in feature. CISA added the flaw to the Known Exploited Vulnerabilities catalog on 2026-08-18, and security reporting confirms it is being actively exploited in the wild, though ransomware use is not yet confirmed. No public proof-of-concept is known, but the high EPSS score (72.7%, 99th percentile) signals a very strong likelihood of imminent or ongoing exploitation.
  · Microsoft Windows 10 1607 · Microsoft Windows 10 1809 KEVmass
• CVE-2026-654009.810%
  Authentication Bypass in Apple macOS Screen Sharing
  CVE-2026-65400 is a critical (CVSS 9.8) improper authentication flaw (CWE-287) in Apple macOS's Screen Sharing service, caused by an authentication state-management defect. An attacker who can reach a vulnerable Mac's Screen Sharing service over the network can authenticate without valid credentials, gaining full remote access with high impact to confidentiality, integrity, and availability. All three currently supported macOS branches are affected: Sequoia, Sonoma, and Tahoe, in versions prior to the fixed releases. The flaw is being actively exploited on the internet, with public reporting that attackers use the bypass to deploy Monero cryptominers, and CISA added it to the Known Exploited Vulnerabilities catalog on 2026-08-18. EPSS estimates a 9.9% probability of exploitation within 30 days (95th percentile).
  · Apple macOS (Screen Sharing service) supported macOS releases prior to the fixed builds listed below · Apple macOS Sequoia all versions prior to 15.7.9 KEVmass
• CVE-2026-593109.846%
  Unauthenticated Path Traversal RCE in Broadcom VMware vCenter Server Syslog
  CVE-2026-59310 is a directory traversal (CWE-22) vulnerability in the Syslog server component of VMware vCenter Server, rated critical at CVSS 9.8. It can be triggered over the network without authentication or user interaction, allowing a malicious actor with network access to vCenter to achieve arbitrary code execution. An attacker who exploits it gains code execution on the vCenter appliance, and reported campaigns show it has been used to establish persistent remote access and, by a suspected China-nexus actor, to deploy Babuk ransomware. Any organization running an affected version of vCenter Server is exposed, especially where the management interface is reachable from the internet; the available data does not specify affected version ranges. Exploitation is confirmed in the wild: CISA added the flaw to its Known Exploited Vulnerabilities catalog on 2026-08-18, it was reportedly exploited just five days after disclosure, and EPSS estimates a 45.9% probability of exploitation within 30 days (99th percentile).
  · Broadcom (VMware) vCenter Server KEV ransomwarelarge
• CVE-2026-550409.151%
  Authentication Bypass in Microsoft SharePoint Server
  Microsoft SharePoint Server is affected by a weak authentication vulnerability (CWE-1390) that allows an unauthorized attacker to bypass a security feature over a network. Per the CVSS vector, exploitation requires no privileges and no user interaction with low attack complexity, so any unauthenticated attacker with network access to a vulnerable server can trigger it remotely. Impact to confidentiality and integrity is rated high (CVSS 9.1, critical), meaning the bypass effectively grants the attacker access that authentication should have prevented, with no direct availability impact. All organizations running on-premises Microsoft SharePoint Server are potentially affected; the source data does not specify affected version ranges or fixed builds, so defenders should consult Microsoft's advisory for those details. The flaw is under active exploitation: a public proof-of-concept is available on GitHub, attackers began exploiting it after the PoC went public, and CISA added it to the Known Exploited Vulnerabilities catalog on 2026-08-18 (EPSS ~40%, 99th percentile; ransomware association unknown).
  · Microsoft SharePoint Server KEV PoC ×2mass
• CVE-2026-456598.876%
  Authenticated Deserialization RCE in Microsoft SharePoint Server (Actively Exploited)
  CVE-2026-45659 is a deserialization-of-untrusted-data vulnerability (CWE-502) in Microsoft SharePoint Server in which an authorized (authenticated, low-privilege) attacker can submit crafted serialized data over the network, with no user interaction required, to execute code on the server. Successful exploitation carries high impact on confidentiality, integrity, and availability within the SharePoint service context, giving attackers a foothold for follow-on activity, and CISA notes that ransomware use is known. Organizations running on-premises Microsoft SharePoint Server are affected; the source data lists no specific version ranges, and the CPE scope (sharepoint server) points to the on-premises product rather than the Microsoft-managed SharePoint Online service. The flaw was added to CISA's Known Exploited Vulnerabilities catalog on 2026-07-01 after active exploitation, and its EPSS score of 76.1% (100th percentile) indicates a high probability of near-term exploitation. The CVE record lists no public proof-of-concept, though related reporting describes exploitation activity following a public PoC release for a SharePoint authentication bypass.
  · Microsoft SharePoint Server KEV ransomwaremass
• CVE-2026-209639.833%
  Deserialization RCE in Microsoft SharePoint Exploited in the Wild
  CVE-2026-20963 is a deserialization of untrusted data flaw (CWE-502) in Microsoft SharePoint that allows an unauthorized attacker to execute code remotely over the network. The flaw is triggered when SharePoint processes maliciously crafted serialized data without validating it, enabling an attacker to run arbitrary code in the context of the SharePoint service. Successful exploitation gives the attacker code execution on the affected SharePoint server, a foothold that typically supports further lateral movement and data access within the environment. Organizations running affected SharePoint deployments are in scope, though affected version ranges have not yet been published in the available data. The vulnerability was added to CISA's Known Exploited Vulnerabilities catalog on 2026-03-18, confirming active exploitation, and its EPSS of 31.6% (98th percentile) indicates a high near-term probability of exploitation; no public proof-of-concept is known and CVSS scoring is not yet available.
  · Microsoft SharePoint KEVmass
• CVE-2025-113717.592%
  Unauthenticated Local File Inclusion in Gladinet CentreStack and Triofox
  Gladinet CentreStack and Triofox, in their default installation and configuration, contain an unauthenticated local file inclusion flaw (CWE-552) that allows unintended disclosure of system files to remote attackers. The flaw requires no privileges or user interaction (CVSS 3.1: AV:N/PR:N/UI:N, 7.5 High), so any internet-facing deployment is directly reachable over the network. An attacker gains access to system files that should not be externally readable, and related reporting indicates active attacks have chained the flaw — including with Gladinet's hardcoded keys — toward unauthorized access, code execution, and deployment of remote access tools. All versions prior to and including 16.7.10368.56560 of both products are affected. Exploitation has been observed in the wild: the vulnerability was added to CISA's KEV on 2025-11-04 and carries a 92.1% EPSS probability of exploitation within 30 days.
  · gladinet centrestack All versions prior to and including 16.7.10368.56560 · gladinet triofox All versions prior to and including 16.7.10368.56560 KEV PoC moderate
• CVE-2026-322016.543%
  Improper Input Validation Spoofing Vulnerability in Microsoft SharePoint Server
  Microsoft SharePoint Server contains an improper input validation flaw (CWE-20) that can be triggered by an unauthenticated, network-based attacker submitting crafted input to the server. Successful exploitation allows the attacker to perform spoofing over the network, impersonating a trusted user or source within SharePoint; detailed impact mechanics have not been published and no CVSS score or public proof-of-concept is available. Any organization running on-premises Microsoft SharePoint Server is potentially affected, and the available data does not specify affected version ranges. CISA added the vulnerability to the Known Exploited Vulnerabilities catalog on 2026-04-14, indicating evidence of active exploitation, and EPSS assigns a 42.8% probability of exploitation within 30 days (99th percentile). Ransomware association is currently unknown.
  · Microsoft SharePoint Server KEVmass
• CVE-2026-261068.81%
  Improper input validation in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
  Improper input validation in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
  · microsoft sharepoint server—
• CVE-2026-261137.8<1%
  Untrusted pointer dereference in Microsoft Office allows an unauthorized attacker to execute code locally.
  Untrusted pointer dereference in Microsoft Office allows an unauthorized attacker to execute code locally.
  · microsoft 365 apps · microsoft office—

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