CVE tracker
Microsoft Exchange Server Remote Code Execution Vulnerability
CVE-2026-70571High 8.1
Research and translation in progress – available shortly.
Information from Microsoft (Patch Tuesday October 2026)
- Severity (Microsoft)
- Critical
- Impact
- Remote code execution – Microsoft Exchange Server
- Status on Patch Tuesday
- Neither exploited nor publicly disclosed
- Exploitability assessment
- Exploitation more likely
- Product family
- Windows ESU (Extended Security Updates), Server software (Exchange, SharePoint …)
- Updates (KB)
- KB5128896, KB5128895, KB5128898, KB5128897
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Original description (NVD)
Stack-based buffer overflow in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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