CISA KEV · Known exploitedCritical

CVE-2023-23397

Microsoft Office

CVE-2023-23397 affects Microsoft Office. Review the CVSS score, exploitation signals, affected versions, remediation status, and linked source material before making a change.

CVSS
9.8
EPSS
97.4%
99.9% percentile
CISA KEV
Listed
Published
2023.03.15
PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV
Exploit probability97.4%
Technical severityCVSS 9.8

Vulnerability overview

CVE-2023-23397 affects Microsoft Office. Review the CVSS score, exploitation signals, affected versions, remediation status, and linked source material before making a change.

Affected product and versions

Product
Microsoft Office
Affected versions
16.0.1, 16.0.0.0, 19.0.0, 15.0.0.0, 2019, 2021, 2013, 2016
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
CISA required action

Apply updates per vendor instructions.

Due date: 2023.04.04
  1. 1
    Identify

    Confirm that Microsoft Office and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-20, CWE-294
KEV added
2023.03.14
Ransomware use
미확인