CVE-2023-23397

CRITICALNVD 9.89.8—Trending — 5 sources updated this weekExploited in the wild

9.8

Microsoft Outlook Elevation of Privilege Vulnerability

CVSS v3: 9.8
EG Score: 9.8(high)
EPSS: 99.8%
KEV: ⚠ Exploited

Published

March 14, 2023

Last Modified

October 27, 2025

Advisory Details (2)

Auto-updated Jun 1, 2026

⚠️ Active exploitation confirmed. Patch available. Sources: microsoft, cisa.

cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-23397

microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-23397

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Microsoft MSRCCVE-2023-233972023-03-14
Microsoft Outlook Elevation of Privilege Vulnerability

Data Freshness Timeline

(refreshed 20× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-03 20:35 UTCEG score recompute
2026-06-03 20:35 UTCVendor advisory
2026-06-03 20:35 UTCGHSA enrichment
2026-06-03 19:09 UTCkev_newly_listed
2026-06-03 16:32 UTCEG score recompute
2026-06-03 16:32 UTCVendor advisory
2026-06-03 16:32 UTCGHSA enrichment
2026-06-03 12:29 UTCEG score recompute
2026-06-03 12:29 UTCVendor advisory
2026-06-03 12:29 UTCGHSA enrichment
2026-06-03 08:26 UTCEG score recompute
2026-06-03 08:26 UTCVendor advisory
2026-06-03 08:26 UTCGHSA enrichment
2026-06-03 04:23 UTCEG score recompute
2026-06-03 04:23 UTCVendor advisory
2026-06-03 04:23 UTCGHSA enrichment
2026-06-03 00:20 UTCEG score recompute
2026-06-03 00:20 UTCVendor advisory
2026-06-03 00:20 UTCGHSA enrichment
2026-06-02 20:17 UTCEG score recompute

Publicly available exploits

(10 references)

Working exploit code is in the public domain (10 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

GitHub PoCMuhammad-Ali007/OutlookNTLM_CVE-2023-23397
First seen Jul 14, 2023
Open source ↗
GitHub PoCvlad-a-man/CVE-2023-23397
First seen May 7, 2023
CVE-2023-23397 PoC
Open source ↗
GitHub PoCBronzeBee/cve-2023-23397
First seen Mar 22, 2023
Python script for sending e-mails with CVE-2023-23397 payload using SMTP
Open source ↗
GitHub PoCtiepologian/CVE-2023-23397
First seen Mar 21, 2023
Proof of Concept for CVE-2023-23397 in Python
Open source ↗
GitHub PoCTrackflaw/CVE-2023-23397
First seen Mar 20, 2023
Simple PoC of the CVE-2023-23397 vulnerability with the payload sent by email.
Open source ↗
GitHub PoCdjackreuter/CVE-2023-23397-PoC
First seen Mar 18, 2023
Open source ↗
GitHub PoCBillSkiCO/CVE-2023-23397_EXPLOIT
First seen Mar 17, 2023
Generates meeting requests taking advantage of CVE-2023-23397. This requires the outlook thick client to send.
Open source ↗
GitHub PoCapi0cradle/CVE-2023-23397-POC-Powershell
First seen Mar 16, 2023
Open source ↗
GitHub PoCka7ana/CVE-2023-23397
First seen Mar 16, 2023
Simple PoC in PowerShell for CVE-2023-23397
Open source ↗
GitHub PoCapi0cradle/LOLBAS-Exchange-CVE-2023-23397✓ verified
First seen Mar 15, 2023
Outlook NTLM relay PoC — credential theft via crafted calendar invites.
Open source ↗

Frequently asked(6)

What is CVE-2023-23397?

CVE-2023-23397 is a critical vulnerability published on March 14, 2023. Microsoft Outlook Elevation of Privilege Vulnerability

When was CVE-2023-23397 disclosed?

CVE-2023-23397 was first published in the National Vulnerability Database on March 14, 2023, with the most recent update on October 27, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-23397 actively exploited?

Yes. CISA added CVE-2023-23397 to the Known Exploited Vulnerabilities catalog on March 14, 2023, affecting Microsoft Office. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.

What is the CVSS score of CVE-2023-23397?

CVE-2023-23397 has a CVSS v3 base score of 9.8 (NVD).

Which products are affected by CVE-2023-23397?

CVE-2023-23397 affects Microsoft Office. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.

How do I remediate CVE-2023-23397?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-23397, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2023-23397

Explore →

Is Your Infrastructure Affected by CVE-2023-23397?

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CVE-2023-23397

Published

Last Modified

Advisory Details (2)

Known Exploited Vulnerabilities Catalog | CISA

Security Update Guide - Microsoft Security Response Center

Weakness Classification(2)

All Vendor Advisories

Data Freshness Timeline

Publicly available exploits

Frequently asked(6)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-23397?

Same vendor

Same CWE

CVE-2023-23397

📅 Published

🔄 Last Modified

📋 Advisory Details (2)

Known Exploited Vulnerabilities Catalog | CISA

Security Update Guide - Microsoft Security Response Center

Weakness Classification(2)

All Vendor Advisories

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(6)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-23397?

🔗 Related CVEs(same vendor + same CWE)

Same vendor

Same CWE

Published

Last Modified

Advisory Details (2)

Frequently asked(6)

Related CVEs(same vendor + same CWE)