CVE-2026-45461
Microsoft Office Remote Code Execution Vulnerability
No known exploitation. EPSS puts it in the 27th percentile. A vendor fix is available.
What to do
The vendor has published a fix. Version details are below where the sources state them.
What it is
From the CVE record
Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.4% chance of exploitation activity in the next 30 days, which ranks it in the 27th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
10 events over 44 days, from the signal feeds we watch.
- Patch availablerecord updated
- Patch availablerecord updated
- OpenVAS check added
- Patch availablerecord updated
- Publishedweakness classified, att&ck mapped
Affected products
- Microsoft 365 Apps for EnterpriseConsumer Software / productivity
- Microsoft Office LTSC 2021Consumer Software / productivity
- Microsoft Office 365 for MacConsumer Software / productivity
- Microsoft Office for AndroidConsumer Software / productivity
- Microsoft Office LTSC for Mac 2021Consumer Software / productivity
- Microsoft Office LTSC for Mac 2024Consumer Software / productivity
- 365 copilotCloud & SaaS / saas-application
- microsoft 365Cloud & SaaS / saas-application
And 15 more affected products. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Scored 8.4 by NVD.
How it is reached
- Attack Vector LocalRequires local access to the vulnerable system (e.g. local login, malicious file)
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
- Initial AccessT1190Exploit Public-Facing Applicationhigh confidence
- Privilege EscalationT1068Exploitation for Privilege Escalationhigh confidence
Sources
References in the record
In the news
- Microsoft Patch Tuesday Fixes Address Critical Zero-Day Flaws
- Microsoft Patch Tuesday for June 2026 — Snort rules and prominent vulnerabilities
- Rapid7
- Microsoft and Adobe Patch Tuesday, June 2026 Security Update Review
- Microsoft June 2026 Patch Tuesday fixes 3 zero-day, 200 flaws
- Microsoft June 2026 Patch Tuesday fixes 6 zero-days, 200 flaws
- Microsoft June 2026 Patch Tuesday - SANS Internet Storm Center
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