CVE-2026-21514

CVE Enrichment

CVSS: 7.8 HIGH
EPSS: 1.59%
EPSS Percentile: 75.78%
CISA KEV: YES — Known Exploited Vulnerability

Description

Reliance on untrusted inputs in a security decision in Microsoft Office Word allows an unauthorized attacker to bypass a security feature locally.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: [email protected]
Published: 11-Feb-2026 01:16
Last Modified: 17-Jun-2026 17:18
EPSS Date: 2026-11-08
CWE: CWE-807

CVSS Vector


            CVSS:3.1                            AV:L /
                            AC:L /
                            PR:N /
                            UI:R /
                            S:U /
                            C:H /
                            I:H /
                            A:H

CISA KEV Details

Date Added: 2026-02-10
Remediation Due: 2026-03-03
Known Ransomware Campaign Use: Unknown
Required Action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Notes: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21514 ; https://nvd.nist.gov/vuln/detail/CVE-2026-21514

CNA Products / Version Status

Microsoft · Microsoft 365 Apps for Enterprise Source: CNA · [email protected]
Default status: unknown

16.0.1 ≤ version < https://aka.ms/OfficeSecurityReleases — affected (custom)

Platforms: 32-bit Systems, x64-based Systems
Microsoft · Microsoft Office LTSC 2021 Source: CNA · [email protected]
Default status: unknown

16.0.1 ≤ version < https://aka.ms/OfficeSecurityReleases — affected (custom)

Platforms: 32-bit Systems, x64-based Systems
Microsoft · Microsoft Office LTSC 2024 Source: CNA · [email protected]
Default status: unknown

16.0.0 ≤ version < https://aka.ms/OfficeSecurityReleases — affected (custom)

Platforms: 32-bit Systems, x64-based Systems
Microsoft · Microsoft Office LTSC for Mac 2021 Source: CNA · [email protected]
Default status: unknown

16.0.1 ≤ version < 16.106.26020821 — affected (custom)
Microsoft · Microsoft Office LTSC for Mac 2024 Source: CNA · [email protected]
Default status: unknown

16.0.0 ≤ version < 16.106.26020821 — affected (custom)

Affected Products / Versions

microsoft / 365_apps Source: NVD CPE · affected
Version / affected range: -
cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*
microsoft / 365_apps Source: NVD CPE · affected
Version / affected range: -
cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:*
microsoft / office_long_term_servicing_channel Source: NVD CPE · affected
Version / affected range: 2021
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:x64:*
microsoft / office_long_term_servicing_channel Source: NVD CPE · affected
Version / affected range: 2021
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:x86:*
microsoft / office_long_term_servicing_channel Source: NVD CPE · affected
Version / affected range: 2021
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:macos:*:*
microsoft / office_long_term_servicing_channel Source: NVD CPE · affected
Version / affected range: 2024
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:-:x64:*
microsoft / office_long_term_servicing_channel Source: NVD CPE · affected
Version / affected range: 2024
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:-:x86:*
microsoft / office_long_term_servicing_channel Source: NVD CPE · affected
Version / affected range: 2024
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:macos:*:*

References

Last enrichment sync: 09-Nov-2026 12:10
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (1)

Notable exploited CVEs include CVE-2026-1281 (Ivanti EPMM), CVE-2024-4577 (PHP on Windows), CVE-2026-21514 (Microsoft Word), CVE-2025-32433 (Erlang SSH RCE), CVE-2025-52691 (SmarterMail), and CVE-2025-9316 (N-able Rapid7 Reports Middle East Cyber Escalation Fueled by Exploitation and Hacktivist Disruption

CVE (5)

Threat Actors (7)

MITRE ATT&CK (3)

Vendors (4)

Products (5)

Countries (2)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.