7.7

CVE-2021-1638: microsoft windows_10

CVSS: 7.7v3.1HighModified
Published 12-01-2021Last modified 08-10-2024
Open JSON

Vulnerability summary

CVE-2021-1638 is a high (CVSS 7.7) vulnerability in microsoft windows_10. EPSS estimates a 1.23% chance of exploitation in the next 30 days, higher than 68.4% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.7/10
010
High · v3.1 (CVE.org)
EPSS score
1.23%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 12-01-2021
    PublishedVulnerability first disclosed.
  2. 08-10-2024
    Last modifiedVulnerability information updated.

Description

Microsoft is aware of the "Impersonation in the Passkey Entry Protocol" vulnerability. For more information regarding the vulnerability, please see this statement from the Bluetooth SIG. To address the vulnerability, Microsoft has released a software update that will fail attempts to pair if the remote device exchanges a public key with the same X coordinate as the locally exchanged public key

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.23%

Chance of exploitation in the next 30 days

Percentile

68%

Versus all other CVEs

30-day change

+0.02 pp

From 1.21% on 20-09-2026

20-09-202620-10-2026
EPSS score
1.23%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Microsoft12 products

1 vendor · 12 products

References

2 links