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Windows Internet Information Services

CVE-2022-35748 — HTTP.sys Denial of Service Vulnerability

Important CVSS 7.5 EPSS 0.47226 2022-08 archive

Executive Summary

None

Overview

7.5
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
More Likely
MS Exploit Likelihood
Category Denial of Service
Released Aug 9 2022
Last Updated Aug 9 2022
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.47226 — 0.98688 percentile
NVD CVSS 7.5 HIGH — matches MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
None
INTEGRITY
None
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 6.5

EPSS Score

0.47226
probability of exploitation in the next 30 days
0.98688 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

7 affected products
Product KB Article Severity Impact Restart Required
Windows Server 2012 5016672 (Monthly Rollup) 5016684 (Security Only) Important Denial of Service 5015863 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C 6.2.9200.23817 Yes None Windows Server 2012 (Server Core installation) 5016672 (Monthly Rollup) 5016684 (Security Only) Important Denial of Service 5015863 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C 6.2.9200.23817 Yes None Windows Server 2012 R2 5016681 (Monthly Rollup) 5016683 (Security Only) Important Denial of Service 5015874 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C 6.3.9600.20520 Yes None Windows Server 2012 R2 (Server Core installation) 5016681 (Monthly Rollup) 5016683 (Security Only) Important Denial of Service 5015874 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C 6.3.9600.20520 Yes None Windows Server 2016 5016622 (Security Update) Important Denial of Service Yes
Windows Server 2016 (Server Core installation) 5016622 (Security Update) Important Denial of Service Yes
Windows Server 2019 5016623 (Security Update) Important Denial of Service Yes
Windows Server 2019 (Server Core installation) 5016623 (Security Update) Important Denial of Service Yes
Windows Server 2022 5016627 (Security Update) Important Denial of Service Yes
Windows Server 2022 (Server Core installation) 5016627 (Security Update) Important Denial of Service Yes
Windows Server, version 20H2 (Server Core Installation) 5016616 (Security Update) Important Denial of Service Yes

Patches

4 patches
Article Type Restart
5016622 Security Update Yes
5016623 Security Update Yes
5016627 Security Update Yes
5016616 Security Update Yes

Known Exploits

Acknowledgments

Polar Bear

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