Exploitation evidence
Known exploited · CISA KEV listed
Added 2026-02-10. Ransomware campaign use: Unknown.
CISA 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.
CISA due date: 2026-03-03. This is the catalog’s deadline, not an assessment of your organization’s exposure.
KEV checked 13 Nov 2026, 00:20 Jerusalem · Original catalog ↗Reported products and versions
Microsoft / Microsoft 365 Apps for Enterprise
Default status: Not specified
- affected: 16.0.1 to < https://aka.ms/OfficeSecurityReleases (custom)
Microsoft / Microsoft Office LTSC 2021
Default status: Not specified
- affected: 16.0.1 to < https://aka.ms/OfficeSecurityReleases (custom)
Microsoft / Microsoft Office LTSC 2024
Default status: Not specified
- affected: 16.0.0 to < https://aka.ms/OfficeSecurityReleases (custom)
Microsoft / Microsoft Office LTSC for Mac 2021
Default status: Not specified
- affected: 16.0.1 to < 16.106.26020821 (custom)
Microsoft / Microsoft Office LTSC for Mac 2024
Default status: Not specified
- affected: 16.0.0 to < 16.106.26020821 (custom)
Fixes and workarounds
No explicit solution text in the downloaded CVE record. Consult the vendor advisory; unaffected version ranges are shown above as reported, not inferred as a patch recommendation.
Sources and related reporting
Observed change timeline
History begins when Egret first downloads each source. It is not the complete upstream CVE history.
12 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-12",
"epss": 0.01587,
"percentile": 0.75963
}10 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-10",
"epss": 0.01587,
"percentile": 0.75819
}09 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-09",
"epss": 0.01587,
"percentile": 0.75789
}08 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-08",
"epss": 0.01587,
"percentile": 0.75778
}07 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-07",
"epss": 0.01587,
"percentile": 0.75761
}06 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-06",
"epss": 0.01587,
"percentile": 0.75722
}06 Nov 2026, 06:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-05",
"epss": 0.01587,
"percentile": 0.75702
}04 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-04",
"epss": 0.01587,
"percentile": 0.75684
}03 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-03",
"epss": 0.01587,
"percentile": 0.75639
}03 Nov 2026, 12:20 Jerusalem · CVE Program record changed
Stored CNA snapshot at this observation.
{
"containers": {
"adp": [
{
"metrics": [
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"other": {
"content": {
"id": "CVE-2026-21514",
"options": [
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"timestamp": "2026-02-11T04:56:01.104546Z",
"version": "2.0.3"
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"cna": {
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{
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],
"product": "Microsoft 365 Apps for Enterprise",
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{
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"product": "Microsoft Office LTSC 2024",
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"cpeApplicability": [
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],
"datePublic": "2026-02-10T16:00:00.000Z",
"descriptions": [
{
"lang": "en-US",
"value": "Reliance on untrusted inputs in a security decision in Microsoft Office Word allows an unauthorized attacker to bypass a security feature locally."
}
],
"metrics": [
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C",
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],
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"tags": [
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"patch"
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"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21514"
}
],
"title": "Microsoft Word Security Feature Bypass Vulnerability"
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},
"cveMetadata": {
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"datePublished": "2026-02-10T17:51:34.153Z",
"dateReserved": "2025-12-30T18:10:54.845Z",
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}03 Nov 2026, 02:22 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-02",
"epss": 0.01587,
"percentile": 0.75612
}03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed
Stored KEV snapshot at this observation.
{
"cveID": "CVE-2026-21514",
"cwes": [
"CWE-807"
],
"dateAdded": "2026-02-10",
"dueDate": "2026-03-03",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Unknown",
"notes": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21514 ; https://nvd.nist.gov/vuln/detail/CVE-2026-21514",
"product": "Office",
"requiredAction": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.",
"shortDescription": "Microsoft Office Word contains a reliance on untrusted inputs in a security decision vulnerability that could allow an authorized attacker to elevate privileges locally.",
"vendorProject": "Microsoft",
"vulnerabilityName": "Microsoft Office Word Reliance on Untrusted Inputs in a Security Decision Vulnerability"
}