CVE-2023-21709CWE-307

CVE-2023-21709

Critical ยท published August 8, 2023

CVSS v3.1
9.8
EPSS
2%
Percentile
80.4
In the wild
Unconfirmed
What it is

๐Ÿšจ An elevation of privilege vulnerability in Microsoft Exchange Server could turn an ordinary user into the superhero of the system with just a well-timed action! ๐Ÿ”ฅ Think of it like a hotel where a guest accidentally finds an unguarded staff-only door and suddenly has access to all the secret rooms โ€” a sneak peek into the inner workings that nobody should be able to access! If exploited, attackers could gain unauthorized access to sensitive data or even take control of critical systems, leading to potentially devastating consequences like data breaches or tampered communications. This vulnerability poses a serious risk to organizations relying on Exchange Server as it can compromise the entire environment.

Put simply

Think of it like a hotel where a guest accidentally finds an unguarded staff-only door and suddenly has access to all the secret rooms โ€” a sneak peek into the inner workings that nobody should be able to access! CVE-2023-21709 allows attackers to escalate their privileges, potentially granting them advanced access to the server's functionalities and data by exploiting flaws in the authentication mechanisms.

What to do

If exploited, attackers could gain unauthorized access to sensitive data or even take control of critical systems, leading to potentially devastating consequences like data breaches or tampered communications. This vulnerability poses a serious risk to organizations relying on Exchange Server as it can compromise the entire environment. To safeguard your systems, immediately apply the latest security updates from Microsoft, review user roles and permissions, and conduct a thorough security audit of your Exchange Server configurations. Staying vigilant is key! Youโ€™ve got this! By taking action now, youโ€™ll keep your systems secure and ready for anything. ๐Ÿ›ก๏ธ

The record
Technical detail
CVSS v3.1
9.8 ยท CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.01983 ยท 80.4th percentile
Weakness
CWE-307 ยท Improper Restriction of Excessive Authentication Attempts
Published
2023-08-08T22:15Z
Affected products (35)
ProductVersionsFixed in
microsoft/exchange_serverall versionsโ€”
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microsoft/exchange_serverall versionsโ€”
microsoft/exchange_serverall versionsโ€”
microsoft/exchange_serverall versionsโ€”
microsoft/exchange_serverall versionsโ€”
microsoft/exchange_serverall versionsโ€”
microsoft/exchange_serverall versionsโ€”
microsoft/exchange_serverall versionsโ€”
microsoft/exchange_serverall versionsโ€”
microsoft/exchange_serverall versionsโ€”
microsoft/exchange_serverall versionsโ€”
microsoft/exchange_serverall versionsโ€”
microsoft/exchange_serverall versionsโ€”
microsoft/exchange_serverall versionsโ€”
microsoft/exchange_serverall versionsโ€”
microsoft/exchange_serverall versionsโ€”
microsoft/exchange_serverall versionsโ€”
microsoft/exchange_serverall versionsโ€”
microsoft/exchange_serverall versionsโ€”
microsoft/exchange_serverall versionsโ€”
microsoft/exchange_serverall versionsโ€”
microsoft/exchange_serverall versionsโ€”
microsoft/exchange_serverall versionsโ€”
microsoft/exchange_serverall versionsโ€”
microsoft/exchange_serverall versionsโ€”
microsoft/exchange_serverall versionsโ€”
microsoft/exchange_serverall versionsโ€”
microsoft/exchange_serverall versionsโ€”
microsoft/exchange_serverall versionsโ€”
References (2)
EPSS history
Timeline
  • 08 AUG 17:08Z
    Microsoft Exchange Server Elevation of Privilege Vulnerability
    cvelistv5