CASCACascade Atlas

Evidence dossier

CVE-2023-23397

Microsoft Outlook Elevation of Privilege Vulnerability

84.2–99.2Priority evidence range
As known Jul 19, 2026, 5:00 AM UTCgen-56ccdaf9

Normalized restatement

Microsoft Outlook Elevation of Privilege Vulnerability

State
PUBLISHED
Published
Mar 14, 2023
Updated
Oct 21, 2025
Evidence coverage
85%
CISA KEVCatalog member

Apply updates per vendor instructions.

FIRST EPSS97.41%

2026-07-18 · v2026.06.15 · percentile 99.9%

Source stateNo scored conflict

Distinct CVSS assessments remain side by side; none are averaged.

Source comparison

Who said what

CISA-ADPindependent enrichment
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CISA ADP Vulnrichment

CVEderivative copy
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CVE Program Container

microsoftoriginal assertion
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Microsoft Outlook Elevation of Privilege Vulnerability

CISA KEVoriginal assertion
observed_exploitation

Microsoft Office Outlook Privilege Escalation Vulnerability

FIRST EPSSoriginal assertion
model_probability

Probability 0.974080000000; percentile 0.998900000000

Applicability

Cited product scope

Trace impact →
MicrosoftMicrosoft 365 Apps for Enterprise
[{"status": "affected", "version": "16.0.1", "lessThan": "https://aka.ms/OfficeSecurityReleases", "versionType": "custom"}]unknown
MicrosoftMicrosoft Office 2019
[{"status": "affected", "version": "19.0.0", "lessThan": "https://aka.ms/OfficeSecurityReleases", "versionType": "custom"}]unknown
MicrosoftMicrosoft Office LTSC 2021
[{"status": "affected", "version": "16.0.1", "lessThan": "https://aka.ms/OfficeSecurityReleases", "versionType": "custom"}]unknown
MicrosoftMicrosoft Outlook 2013 Service Pack 1
[{"status": "affected", "version": "15.0.0.0", "lessThan": "15.0.5537.1000", "versionType": "custom"}]unknown
MicrosoftMicrosoft Outlook 2016
[{"status": "affected", "version": "16.0.0.0", "lessThan": "16.0.5387.1000", "versionType": "custom"}]unknown
Unknown vendorUnknown product
cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:a:microsoft:outlook:2013:sp1:*:*:-:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:a:microsoft:outlook:2013:sp1:*:*:rt:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:a:microsoft:outlook:2016:*:*:*:*:*:*:*supported

Assessments

CVSS by origin

9.8
nvd@nist.govCVSS 3.1 · role PrimaryCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8
secure@microsoft.comCVSS 3.1 · role SecondaryCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8
microsoftCVSS 3.1 · role unknownCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C

Limitations and unknowns

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; unresolved scope remains unknown.
  • NVD-carried upstream facts remain derivative and are not independent corroboration.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Factor D is unknown in Public Core because no accepted canonical mapping-obligation ledger is present.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.