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Microsoft patches high-severity SharePoint remote code execution vulnerability CVE-2026-45659

Evidence first: scan the strongest sources, then decide whether to go deeper.

Published 2026-05-26 10:44 UTCUpdated 2026-05-26 14:00 UTC
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cvevulnerabilitysecurity_updatemicrosoftsharepointrce
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Evidence trail (top sources)
top sources (3 domains)domains are deduped. counts indicate coverage, not truth.
3 top sources shown
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Overview

Microsoft has issued patches for a high-severity remote code execution vulnerability in multiple SharePoint Server versions. The flaw, CVE-2026-45659, involves deserialization of untrusted data and can be exploited by authenticated attackers without user interaction. Given the low complexity of attacks, organizations using affected SharePoint editions should apply updates immediately to mitigate risks of remote code execution and potential server compromise.

Score total
1.29
Momentum 24h
3
Evidence documents
-
Independent publishers
-
Independent origins
-
Primary sources
-
Secondary sources
-
Source types
-
Duplicate ratio
0%
Why now
  • Microsoft has just released patches, making immediate updates critical to prevent exploitation.
  • The vulnerability affects widely used SharePoint Server versions, impacting many organizations.
  • Recent disclosures and updates highlight active attention to SharePoint security risks in 2026.
Why it matters
  • The SharePoint vulnerability allows remote code execution with low attack complexity, posing a serious risk to affected servers.
  • Exploitation requires no user interaction, increasing the urgency for patching in enterprise environments.
  • Prompt patching reduces the risk of attackers gaining control over SharePoint servers, protecting sensitive data and infrastructure.
LLM analysis
Topic mix: lowPromo risk: lowSource quality: medium
Recurring claims
  • CVE-2026-45659 is a critical remote code execution vulnerability in SharePoint allowing authenticated attackers to execute code remotely with low attack complexity and no user interaction.
How sources frame it
  • The Hacker News, Help Net Security: neutral
Consolidated multiple reports on CVE-2026-45659 SharePoint RCE vulnerability patching.
All evidence
All evidence
CVE-2026-45495 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
Microsoft · msrc.microsoft.com · 2026-05-26 14:00 UTC
Microsoft Patches SharePoint RCE Flaw CVE-2026-45659 Across Server Versions
Thehackernews · thehackernews.com · 2026-05-26 11:49 UTC
High-severity SharePoint RCE bug patched by Microsoft (CVE-2026-45659)
Helpnetsecurity · helpnetsecurity.com · 2026-05-26 10:44 UTC
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Posts loaded: 0Publishers: 3Origin domains: 3Duplicates: -
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Top publishers (this list)
  • Microsoft (1)
  • Thehackernews (1)
  • Helpnetsecurity (1)
Top origin domains (this list)
  • msrc.microsoft.com (1)
  • thehackernews.com (1)
  • helpnetsecurity.com (1)