Detections
Analytics
Microsoft Exchange Server Authentication Bypass
critical Nessus Plugin ID 147171
Language:
Synopsis
The remote mail server is affected by an authentication bypass vulnerability.Description
The Microsoft Exchange running on the remote host is affected by an authentication bypass vulnerability. An unauthenticated remote attacker can exploit this to execute arbitrary code.Solution
Microsoft has released the following security updates to address this issue:-KB5000871
See Also
http://www.nessus.org/u?14b26c05
http://www.nessus.org/u?fedb98e4
Plugin Details
Severity: Critical
ID: 147171
File Name: exchange_cve-2021-26855.nbin
Version: 1.63
Type: remote
Agent: windows
Family: Windows
Published: 3/8/2021
Updated: 4/15/2024
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Critical
Score: 9.1
CVSS v2
Risk Factor: High
Base Score: 7.5
Temporal Score: 6.5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS Score Source: CVE-2021-26855
CVSS v3
Risk Factor: Critical
Base Score: 9.1
Temporal Score: 8.7
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Temporal Vector: CVSS:3.0/E:H/RL:O/RC:C
Vulnerability Information
CPE: cpe:/a:microsoft:exchange_server
Required KB Items: installed_sw/Exchange Server
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 3/2/2021
Vulnerability Publication Date: 3/2/2021
CISA Known Exploited Vulnerability Due Dates: 4/16/2021
Exploitable With
CANVAS (CANVAS)
Core Impact
Metasploit (Microsoft Exchange ProxyLogon RCE)
Reference Information
CVE: CVE-2021-26855