Signal
CISA warns of active exploitation of critical Microsoft SharePoint vulnerability CVE-2026-45659
Evidence first: scan the strongest sources, then decide whether to go deeper.
Published 2026-07-02 05:46 UTCUpdated 2026-07-02 19:43 UTC
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Evidence trail (top sources)
top sources (4 domains)domains are deduped. counts indicate coverage, not truth.4 top sources shown
Overview
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added a critical remote code execution vulnerability in Microsoft SharePoint Server, CVE-2026-45659, to its Known Exploited Vulnerabilities catalog following evidence of active exploitation by threat actors....
Entities
MicrosoftCybersecurity and Infrastructure Security AgencyCanadian Centre for Cyber Security
Score total
1.61
Momentum 24h
5
Posts
5
Origins
5
Source types
1
Duplicate ratio
0%
Why now
- The flaw was recently added to CISA's Known Exploited Vulnerabilities list.
- Active exploitation has been observed in the wild, increasing urgency.
- The vulnerability was initially overlooked in patch releases, delaying mitigation efforts.
Why it matters
- The vulnerability allows remote code execution, risking full system compromise.
- SharePoint often contains sensitive organizational data, increasing impact severity.
- Active exploitation means organizations are currently at risk and must act quickly.
LLM analysis
Topic mix: lowPromo risk: lowSource quality: high
Recurring claims
- CVE-2026-45659 is a critical remote code execution vulnerability in Microsoft SharePoint Server actively exploited by threat actors.
- The vulnerability was mistakenly omitted from the May Patch Tuesday bulletin but is now recognized as a significant risk requiring immediate patching.
How sources frame it
- CISA And Cybersecurity News Sources: neutral
All evidence
All evidence
CISA adds SharePoint flaw to known exploited vulnerabilities list
SC Media · scworld.com · 2026-07-02 19:43 UTC
AL26-015 - Critical vulnerability impacting Microsoft SharePoint Server – CVE-2026-45659
Canadian Centre for Cyber Security - Alerts · cyber.gc.ca · 2026-07-02 14:37 UTC
US cyber agency warns over forgotten SharePoint flaw
ComputerWeekly IT Security · computerweekly.com · 2026-07-02 13:17 UTC
CISA Warns of Actively Exploited Microsoft SharePoint Vulnerability
SecurityWeek · securityweek.com · 2026-07-02 10:30 UTC
SharePoint RCE CVE-2026-45659 Added to CISA KEV After Active Exploitation
thehackernews · thehackernews.com · 2026-07-02 05:46 UTC
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Posts loaded: 0Publishers: 5Origin domains: 5Duplicates: -
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Top publishers (this list)
- SC Media (1)
- Canadian Centre for Cyber Security - Alerts (1)
- ComputerWeekly IT Security (1)
- SecurityWeek (1)
- thehackernews (1)
Top origin domains (this list)
- scworld.com (1)
- cyber.gc.ca (1)
- computerweekly.com (1)
- securityweek.com (1)
- thehackernews.com (1)