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Fencer Vulns
high 8.8

CVE-2024-21378 in the critical feed json

Microsoft Outlook Remote Code Execution Vulnerability

published 2024-02-13 2 y ago modified 2026-08-10 2 mo ago also EUVD-2024-19090

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
11.0%
EPSS 11.0% chance of exploitation in 30 days, percentile 95%
public exploits
0
none known

Summary

Microsoft Outlook Remote Code Execution Vulnerability

Patch / fix

  • Microsoft Microsoft Outlook 2016 16.0.5435.1000

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2 y ago

Exploit prediction

10.98% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Microsoft Microsoft 365 Apps for Enterprise
  • Microsoft Microsoft Office 2019
  • Microsoft Microsoft Office LTSC 2021
  • Microsoft Microsoft Outlook 2016

Classification

Weakness
  • CWE-94 Improper Control of Generation of Code

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.