Lucene search
K
Database
Vendors
Products
Years
CVSS
Scanner
Agent Scanning
API Scanning
Manual Audit
Perimeter Scanner
Scanning
Projects
Email
Webhook
Plugins
Resources
Documents
Blog
Glossary
FAQ
Pricing
Contacts
About Us
Partners
Branding Guideline
msrcMicrosoft Security Response CenterMSRC:C28CD823FBB321014DB6D53A28DA0CD1
HistoryApr 13, 2021 - 7:00 a.m.

April 2021 Update Tuesday packages now available

2021-04-1307:00:00
Microsoft Security Response Center
link
18

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

10 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:C/I:C/A:C

0.975 High

EPSS

Percentile

99.9%

JSON

Update August 25, 2021: Microsoft strongly recommends that you update your servers with the most recent security updates available. CVE-2021-34473 (ProxyShell) CVE-2021-34523 (ProxyShell) CVE-2021-33766 Today is Update Tuesday – our commitment to provide a predictable monthly schedule to release updates and provide the latest protection to our customers. Update Tuesday is a monthly cycle when Microsoft releases patches for vulnerabilities that we have found proactively or that have been disclosed to us through our security partnerships under a coordinated vulnerability disclosure.

Related

msrc 1
checkpoint_advisories 2
githubexploit 10
packetstorm 1
malwarebytes 7
thn 11
threatpost 17
rapid7blog 6
cisa 2
hivepro 8
pentestpartners 1
attackerkb 5
trellix 2
fireeye 1
metasploit 1
zdt 1
nessus 1
mskb 1
kaspersky 1
qualysblog 8
zdi 3
cve 3
ics 5
prion 3
cisa_kev 3
mscve 3
securelist 3
mmpc 2
krebs 1
nuclei 1
impervablog 1
avleonov 2
mssecure 1
msrc
msrc
April 2021 Update Tuesday packages now available
2021-04-13 07:00:00
checkpoint_advisories
checkpoint_advisories
Microsoft Exchange Server Remote Code Execution (CVE-2021-34473; CVE-2021-34523)
2021-07-14 00:00:00
Microsoft Exchange Information Disclosure (CVE-2021-33766)
2021-09-05 00:00:00
githubexploit
githubexploit
Exploit for Vulnerability in Microsoft
2021-10-02 07:29:24
Exploit for Improper Authentication in Microsoft
2021-08-31 22:03:13
Exploit for Improper Authentication in Microsoft
2021-09-15 09:09:20
packetstorm
packetstorm
Microsoft Exchange ProxyShell Remote Code Execution
2021-08-20 00:00:00
malwarebytes
malwarebytes
Patch now! Microsoft Exchange is being attacked via ProxyShell
2021-08-23 13:21:08
IIS extensions are on the rise as backdoors to servers
2022-07-27 13:58:06
AvosLocker ransomware uses Microsoft Exchange Server vulnerabilities, says FBI
2022-03-21 21:09:12
thn
thn
New Incident Report Reveals How Hive Ransomware Targets Organizations
2022-04-21 10:00:00
WARNING: Microsoft Exchange Under Attack With ProxyShell Flaws
2021-08-22 09:51:00
Hackers Exploiting ProxyLogon and ProxyShell Flaws in Spam Campaigns
2021-11-22 11:47:00
threatpost
threatpost
IKEA Hit by Email Reply-Chain Cyberattack
2021-11-29 21:22:12
Microsoft Breaks Silence on Barrage of ProxyShell Attacks
2021-08-26 12:39:54
Attackers Hijack Email Using Proxy Logon/Proxyshell Flaws
2021-11-22 19:26:25
rapid7blog
rapid7blog
For Microsoft Exchange Server Vulnerabilities, Patching Remains Patchy
2021-10-06 14:07:12
Metasploit Wrap-Up
2021-08-20 19:12:00
ProxyShell: More Widespread Exploitation of Microsoft Exchange Servers
2021-08-12 21:08:43
cisa
cisa
Urgent: Protect Against Active Exploitation of ProxyShell Vulnerabilities
2021-08-21 00:00:00
CISA Adds 13 Known Exploited Vulnerabilities to Catalog
2022-01-18 00:00:00
hivepro
hivepro
BlackByte ransomware exploits Microsoft Servers ProxyShell Vulnerabilities
2021-12-07 13:24:49
Magic Hound Exploiting Old Microsoft Exchange ProxyShell Vulnerabilities
2022-03-25 04:05:09
Hive Ransomware targets organizations with ProxyShell exploit
2022-04-22 14:34:47
pentestpartners
pentestpartners
Hive Ransomware is on the rise. How should you deal with it?
2022-11-18 06:44:42
attackerkb
attackerkb
ProxyShell Exploit Chain
2021-08-20 00:00:00
CVE-2021-33766 ProxyToken
2021-07-14 00:00:00
CVE-2021-34523
2021-07-14 00:00:00
trellix
trellix
Trellix Global Defenders: Analysis and Protections for BlackByte Ransomware
2022-02-28 00:00:00
Trellix Global Defenders: Analysis and Protections for BlackByte Ransomware
2022-02-28 00:00:00
fireeye
fireeye
PST, Want a Shell? ProxyShell Exploiting Microsoft Exchange Servers
2021-09-03 10:00:00
metasploit
metasploit
Microsoft Exchange ProxyShell RCE
2021-08-18 14:50:34
zdt
zdt
Microsoft Exchange ProxyShell Remote Code Execution Exploit
2021-08-21 00:00:00
nessus
nessus
Security Updates for Microsoft Exchange Server (April 2021)
2021-04-13 00:00:00
mskb
mskb
Description of the security update for Microsoft Exchange Server 2019, 2016, and 2013: April 13, 2021 (KB5001779)
2021-07-13 07:00:00
kaspersky
kaspersky
KLA12224 Multiple vulnerabilities in Microsoft Exchange Server
2021-07-13 00:00:00
qualysblog
qualysblog
AvosLocker Ransomware Behavior Examined on Windows & Linux
2022-03-07 05:18:46
Qualys Tackles 2022’s Top Routinely Exploited Cyber Vulnerabilities
2023-08-24 19:07:05
In-Depth Look Into Data-Driven Science Behind Qualys TruRisk
2022-10-10 14:32:29
zdi
zdi
Microsoft Exchange Server ECP Authentication Bypass Information Disclosure Vulnerability
2021-07-15 00:00:00
(Pwn2Own) Microsoft Exchange Server PowerShell Improper Authentication Remote Code Execution Vulnerability
2021-07-19 00:00:00
(Pwn2Own) Microsoft Exchange Server Autodiscover Server Side Request Forgery Authentication Bypass Vulnerability
2021-07-19 00:00:00
cve
cve
CVE-2021-33766
2021-07-14 18:15:00
CVE-2021-34523
2021-07-14 18:15:00
CVE-2021-34473
2021-07-14 18:15:00
ics
ics
#StopRansomware: Hive Ransomware
2022-11-25 12:00:00
Iranian Islamic Revolutionary Guard Corps-Affiliated Cyber Actors Exploiting Vulnerabilities for Data Extortion and Disk Encryption for Ransom Operations
2022-09-14 12:00:00
Iranian Government-Sponsored APT Cyber Actors Exploiting Microsoft Exchange and Fortinet Vulnerabilities in Furtherance of Malicious Activities
2021-11-19 12:00:00
prion
prion
Information disclosure
2021-07-14 18:15:00
Remote code execution
2021-07-14 18:15:00
Privilege escalation
2021-07-14 18:15:00
cisa_kev
cisa_kev
Microsoft Exchange Server Information Disclosure
2022-01-18 00:00:00
Microsoft Exchange Server Privilege Escalation Vulnerability
2021-11-03 00:00:00
Microsoft Exchange Server Remote Code Execution Vulnerability
2021-11-03 00:00:00
mscve
mscve
Microsoft Exchange Server Information Disclosure Vulnerability
2021-07-13 07:00:00
Microsoft Exchange Server Elevation of Privilege Vulnerability
2021-07-13 07:00:00
Microsoft Exchange Server Remote Code Execution Vulnerability
2021-07-13 07:00:00
securelist
securelist
CVE-2022-41040 and CVE-2022-41082 – zero-days in MS Exchange
2022-12-19 16:15:49
From Caribbean shores to your devices: analyzing Cuba ransomware
2023-09-11 10:00:26
IT threat evolution in Q3 2021. PC statistics
2021-11-26 12:00:36
mmpc
mmpc
The five-day job: A BlackByte ransomware intrusion case study
2023-07-06 17:00:00
Guidance for preventing, detecting, and hunting for exploitation of the Log4j 2 vulnerability
2021-12-12 05:29:03
krebs
krebs
Microsoft Patch Tuesday, July 2021 Edition
2021-07-13 21:41:47
nuclei
nuclei
Exchange Server - Remote Code Execution
2021-08-10 07:59:06
impervablog
impervablog
Microsoft Exchange Server Vulnerabilities CVE-2022-41040 and CVE-2022-41082
2022-09-30 16:47:34
avleonov
avleonov
Security News: Exchange ProxyShell, Zoom RCE, Citrix Canceled PT Acknowledgments, Cisco No Patch Router RCEs
2021-08-31 23:16:51
Vulnerability Management news and publications #2
2022-08-14 11:30:44
mssecure
mssecure
Guidance for preventing, detecting, and hunting for exploitation of the Log4j 2 vulnerability
2021-12-12 05:29:03

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

10 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:C/I:C/A:C

0.975 High

EPSS

Percentile

99.9%

JSON
Related for MSRC:C28CD823FBB321014DB6D53A28DA0CD1
msrc1checkpoint_advisories2githubexploit10packetstorm1malwarebytes7thn11threatpost17rapid7blog6cisa2hivepro8pentestpartners1attackerkb5trellix2fireeye1metasploit1zdt1nessus1mskb1kaspersky1qualysblog8zdi3cve3ics5prion3cisa_kev3mscve3securelist3mmpc2krebs1nuclei1impervablog1avleonov2mssecure1