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Fencer Intel
medium 5.9

CVE-2026-123395 json

Microsoft Office Excel Information Disclosure Vulnerability

published yesterday modified 17h ago also EUVD-2026-122301

cvss
5.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 31%
public exploits
0
none known

Summary

Improper control of generation of code ('code injection') in Microsoft Office Excel allows an authorized attacker to disclose information locally.

Patch / fix

  • Microsoft Microsoft Office 365 for Mac 16.115.26110837
  • Microsoft Microsoft Office LTSC 2021 16.0.14334.21048
  • Microsoft Microsoft Office LTSC 2024 16.0.17932.21140
  • Microsoft Microsoft Office LTSC for Mac 2021 16.115.26110837
  • Microsoft Microsoft Office LTSC for Mac 2024 16.115.26110837

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
yesterday

Exploit prediction

0.37% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 5.9 CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C
CNA 3.1 5.9 CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N

Affected products

  • Microsoft Microsoft 365 Apps for Enterprise
  • Microsoft Microsoft Office 365 for Mac
  • Microsoft Microsoft Office LTSC 2021
  • Microsoft Microsoft Office LTSC 2024
  • Microsoft Microsoft Office LTSC for Mac 2021
  • Microsoft Microsoft Office LTSC for Mac 2024

Classification

Weakness
  • CWE-94 Improper Control of Generation of Code

References

Sources

Fencer Intel 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.