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PatchSiren cyber security CVE debrief

CVE-2023-23391 Microsoft CVE debrief

CVE-2023-23391 is a Microsoft Office for Android spoofing vulnerability with a medium CVSS score of 5.5. The NVD record shows a user-interaction-dependent issue that can affect integrity, with no listed confidentiality or availability impact. Microsoft’s MSRC advisory is the primary vendor reference for remediation. For defenders, the main concern is Android deployments of Microsoft Office, especially where app versions are centrally managed and users may trust the app interface to represent content or identity accurately. The NVD record specifically identifies the vulnerable Android CPE for Microsoft Office, indicating that update verification should focus on Android builds rather than desktop Office installations.

Vendor
Microsoft
Product
Microsoft Office for Android
CVSS
MEDIUM 5.5
CISA KEV
Not listed in stored evidence
Original CVE published
2023-03-14
Original CVE updated
2024-11-21
Advisory published
2023-03-14
Advisory updated
2024-11-21

Who should care

Organizations and users running Microsoft Office for Android, especially in managed mobile fleets where app versions are centrally deployed and trust in the app UI matters.

Technical summary

NVD classifies CVE-2023-23391 as CVSS 3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N. That means the issue requires user interaction, has no privileges required, and is primarily an integrity problem. NVD also lists a vulnerable Microsoft Office Android CPE: cpe:2.3:a:microsoft:office:16.0.16026.20172:*:*:*:*:android:*:*.

Defensive priority

Medium priority. Update Microsoft Office for Android promptly, validate that managed devices are not pinned to the vulnerable build, and use the Microsoft advisory as the authoritative remediation source.

Recommended defensive actions

  • Review the Microsoft MSRC advisory for CVE-2023-23391 and apply the recommended update path for Office for Android.
  • Check managed Android app deployments to confirm Office for Android is not running the vulnerable build identified by NVD.
  • Prioritize updates on devices where Office is used to view or share trusted business content.
  • Communicate to users that this issue involves spoofing and depends on user interaction, so visual trust cues should not be taken at face value until patched.

Evidence notes

Official sources provided in the corpus include the CVE record, the NVD detail page, and Microsoft’s MSRC advisory. The NVD metadata lists the CVSS vector CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N and identifies the vulnerable Android CPE cpe:2.3:a:microsoft:office:16.0.16026.20172:*:*:*:*:android:*:*. The record was published on 2023-03-14 and later modified on 2024-11-21. NVD also lists Microsoft’s MSRC advisory as the patch/vendor reference.

Sources and references

Verified primary and authoritative sources

  • CVE-2023-23391 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2023-23391

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2023-23391 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2023-23391

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.