CVE-2021-43216
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Microsoft Local Security Authority (LSA) Server Information Disclosure Vulnerability
rank 26 = 1 + 16 + 1 + 8 + 0
rank@v1 · scheduled
Someone is already using it
CISA KEV catalog · public proof-of-concept · FIRST EPSS
EPSS 0.03246 · without this subject the record ranks 25
What it costs you if it fires
NVD CVSS base score, then the CNA's own
CVSS 6.5, from NVD · without this subject the record ranks 10
It is getting worse, not staying still
FIRST EPSS series, rescorings and bad loads removed
rose on 2025-10-01 · without this subject the record ranks 25
How much of the world it touches
NVD CPE configurations
11 products in the CPE ranges · without this subject the record ranks 18
Someone else already set the date
CISA KEV remediation due date
no CISA due date · without this subject the record ranks 26
$99,200 = $4.99M incident cost x 0.6121449559255632 exposure x 0.03246 likelihood
udv@v1 · unaudited · wrong for you until you say what you run
$4.99M is the cost of a breach that happened, from IBM Cost of a Data Breach Report 2026, global average. It is not the value of any asset of yours. That average already covers breaches of every severity, so scaling it by exposure understates a partial-impact record. That is an assumption, not a measurement. Your own asset value goes in the decision record.
Hindsight · the state
Foresight · where to check next
No weakness class or product neighbourhood is held for this record, so this index cannot name anywhere to check next. That is an absence in the record, not a finding about the software.
Running Microsoft Windows 10 Version 1809? Check your version
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Harm, if it fires from the vector and the weakness
Written for the ticket you're about to file.
CISA KEV & Federal Remediation Deadline from the record and CISA
The fix, and how long it's been waiting.
Exploit Status & Known PoCs a ladder, not a score
Current rung: Nothing observed in held sources.
- RUNG 1Nothing observed in held sources
- RUNG 2Proof-of-concept published
- RUNG 3Exploited in the wild · CISA KEV listed
- RUNG 4Ransomware campaign use known
Affected & Fixed Versions as published
Show all 11 published ranges
A rung lights from a row in the index, never from an assessment. "Held sources" is the true scope of the claim: this index reads the CVE record, NVD, CISA KEV, FIRST's EPSS and public proof-of-concept repositories, and it does not observe attacks.
What it is stated by the CNA
Microsoft Local Security Authority (LSA) Server Information Disclosure Vulnerability receipt
NVD's analysis a second authority
- severity
- 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- weakness
- CWE-668
- affected versions
- microsoft windows 10 20h2; microsoft windows 10 21h1; microsoft windows 10 1607; and 8 more, listed in full below
- also scored by
- [email protected] 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
check it yourself portal.msrc.microsoft.com receipt
Dated events
Movement the material steps
Show all 39 observations
39 observations held. A highlighted step crossed a promotion threshold. A step marked with a scoring model moved because the instrument was replaced, not because the vulnerability changed. receipt
The full biography
The record had been public for 4 years, 6 months when this index was last written.
Siblings and hubs
Records related to this one
No record cites this identifier and it carries no alias. Its defect family is below.
Its defect family
microsoft windows 10 version 1809
Of the 3 records in this family, this is the only one whose title names microsoft local security.
Grouped by shared product and weakness, not by shared vulnerability. Each record's own state is on its own page.
Family membership: held values
This record is one of a group, and the group's page describes all of them. This page is kept and dated, and the defect family's own page is the one we offer for indexing: the whole group.
Browse the index from here
These are index-wide views, not findings about CVE-2021-43216.
What usually comes next
Everything above needs no account. What is below is work: assembling it, scoping it to your estate, watching it, and handing it to someone else.