CVE-2023-21716

CRITICALNVD 9.89.8—Elevated

9.8

Microsoft Word Remote Code Execution Vulnerability

CVSS v3: 9.8
EG Score: 9.8(high)
EPSS: 99.7%
KEV: Not listed

Published

February 14, 2023

Last Modified

November 21, 2024

References (2)

secure@microsofthttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21716
af854a3a-2127-422b-91ae-364da2661108https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21716

Weakness Classification(1)

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

CWE-190Integer Overflow or Wraparound

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-2023-217162023-02-14
Microsoft Word Remote Code Execution Vulnerability

Data Freshness Timeline

(refreshed 11× 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.

2026-06-05 22:46 UTCepss_batch
2026-06-05 22:46 UTCepss_batch
2026-06-05 22:46 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
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2026-06-01 13:51 UTCepss_batch
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2026-05-31 22:29 UTCepss_batch
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2026-05-28 13:43 UTCepss_batch
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2026-05-26 07:18 UTCepss_batch
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2026-05-26 07:17 UTCepss_batch
2026-05-25 06:45 UTCEG score recompute

Publicly available exploits

(8 references)

Working exploit code is in the public domain (8 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

GitHub PoCRonF98/CVE-2023-21716-POC
First seen Sep 16, 2024
Proof Of Concept for CVE-2023-21716 Microsoft Word Heap Corruption
Open source ↗
GitHub PoCMojithaR/CVE-2023-21716-EXPLOIT.py
First seen Nov 4, 2023
This is an exploit file which is used to check CVE-2021-21716 vulnerability
Open source ↗
GitHub PoCLord-of-the-IoT/CVE-2023-21716
First seen Jun 13, 2023
python program to exploit CVE-2023-21716
Open source ↗
GitHub PoCJMousqueton/CVE-2023-21716
First seen Apr 16, 2023
POC : CVE-2023-21716 Microsoft Word RTF Font Table Heap Corruption
Open source ↗
GitHub PoChv0l/CVE-2023-21716_exploit
First seen Mar 24, 2023
test of exploit for CVE-2023-21716
Open source ↗
GitHub PoCgyaansastra/CVE-2023-21716
First seen Mar 8, 2023
A vulnerability within Microsoft Office's wwlib allows attackers to achieve remote code execution with the privileges of the victim that opens a malicious RTF document. The attacker could deliver this file as an email attachment (or other means).
Open source ↗
GitHub PoCFeatherStark/CVE-2023-21716
First seen Mar 7, 2023
Open source ↗
GitHub PoCXnuvers007/CVE-2023-21716
First seen Mar 7, 2023
RTF Crash POC Python 3.11 Windows 10
Open source ↗

Frequently asked(5)

What is CVE-2023-21716?

CVE-2023-21716 is a critical vulnerability published on February 14, 2023. Microsoft Word Remote Code Execution Vulnerability

When was CVE-2023-21716 disclosed?

CVE-2023-21716 was first published in the National Vulnerability Database on February 14, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-21716 actively exploited?

CVE-2023-21716 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-21716?

CVE-2023-21716 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2023-21716?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-21716, 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-2023-21716

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CVE-2023-21716

Published

Last Modified

References (2)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Publicly available exploits

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-21716?

Same vendor

Same CWE

CVE-2023-21716

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-21716?

🔗 Related CVEs(same vendor + same CWE)

Same vendor

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Last Modified

References (2)

Frequently asked(5)

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