5.8
CVSSv2

CVE-2021-26427

Published: 13/10/2021 Updated: 19/10/2021
CVSS v2 Base Score: 5.8 | Impact Score: 6.4 | Exploitability Score: 6.5
CVSS v3 Base Score: 9.6 | Impact Score: 6 | Exploitability Score: 2.8
Vector: AV:A/AC:L/Au:N/C:P/I:P/A:P

Vulnerability Summary

Microsoft Exchange Server Remote Code Execution Vulnerability

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Recent Articles

Microsoft Oct. Patch Tuesday Squashes 4 Zero-Day Bugs
Threatpost • Lisa Vaas • 12 Oct 2021

Today is Microsoft’s October 2021 Patch Tuesday, and it delivers fixes for four zero-day vulnerabilities, one of which is being exploited in a far-reaching espionage campaign that delivers the new MysterySnail RAT malware to Windows servers.
Microsoft reported a total of 74 vulnerabilities, three of which are rated critical.
Security researchers pointed to CVE-2021-40449, an elevation of privilege vulnerability in Win32k, as standing out from the crowd of patches, given that It’s...

Microsoft Patch Tuesday bug harvest festival comes to town
The Register • Thomas Claburn in San Francisco • 12 Oct 2021

Get our weekly newsletter With 71 new CVEs, there are patches enough for everyone

Microsoft's October Patch Tuesday has arrived with fixes for 71 new CVEs, two patch revisions to address bugs from previous months that just won't die, and three CVEs tied to OpenSSL flaws. That's in addition to eight Edge-Chromium CVEs dealt with earlier this month.
Two of the fresh bugs are rated Critical, 68 are designated Important, and one is rated Low severity.
Four among the overall October harvest have been publicly disclosed, including one from July, an Azure AD security fea...