CVE-2024-21410KEV · OVERDUECWE-287

Microsoft Exchange Server Elevation of Privilege Vulnerability

Critical · published February 13, 2024

Patch now

Confirmed exploited, and the score agrees

CVSS calls it critical at 9.8. It is confirmed in active exploitation. It sits in the 96.2th percentile for exploit probability.

962
days past CISA
deadline
CVSS v3.1
9.8
EPSS
13%
Percentile
96.2
In the wild
Confirmed
What it is

🚨 A critical vulnerability in Microsoft Exchange Server allows attackers to elevate privileges without breaking a sweat! 🔥 Think of it like a disgruntled employee sneaking into the executive office without clearance—once inside, they can access all the confidential files and make themselves the boss! With this vulnerability, an attacker could gain superuser access to the system, potentially allowing them to read sensitive data, modify configurations, or even wreak havoc across the entire organization. This isn't just a minor breach; it's like handing an intruder the keys to your entire network!

Put simply

Think of it like a disgruntled employee sneaking into the executive office without clearance—once inside, they can access all the confidential files and make themselves the boss! This elevation of privilege vulnerability in Microsoft Exchange Server enables unauthorized users to access and control parts of the system by exploiting improper validation of user inputs. Simply put, the system trusts them more than it should—a classic case of misplaced trust!

What to do

With this vulnerability, an attacker could gain superuser access to the system, potentially allowing them to read sensitive data, modify configurations, or even wreak havoc across the entire organization. This isn't just a minor breach; it's like handing an intruder the keys to your entire network! To secure your systems, immediately upgrade to the latest patched version of Microsoft Exchange Server. Additionally, review user accounts for any suspicious activity and reinforce your access controls to minimize the risk of unauthorized access. Don't wait—act now! You've got this! Take these steps today, and you'll be a hero protecting your network! 🛡️

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
CVSS v4.0
Not supplied
EPSS
0.12561 · 96.2th percentile
Weakness
CWE-287 · Improper Authentication
Published
2024-02-13T18:02Z
KEV added
2024-02-15 · due 2024-03-07
EPSS history
Timeline
  • 15 FEB 00:00Z
    Added to CISA KEV — remediate by Mar 7
    kev
  • 13 FEB 18:02Z
    Microsoft Exchange Server Elevation of Privilege Vulnerability
    cvelistv5