Windows MSHTML Platform Security Feature Bypass Vulnerability
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for help- Published
- May 9, 2023
- Updated
- Jun 17, 2026
- EPSS
- 2.9% · 86th percentile
- CWE
- CWE-73
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Report tools
Action score
27
Monitor
Low priority for now.
- CVSS
- 26 / 40 · 6.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 2.9%
CNA vs NVD score
- NVD
- 6.5
- CNA · microsoft
- 6.5
- agree
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L/E:U/RL:O/RC:C
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| microsoft | windows 10 1507 | cpe:2.3:o:microsoft:windows_10_1507 |
| microsoft | windows 10 1607 | cpe:2.3:o:microsoft:windows_10_1607 |
| microsoft | windows 10 1809 | cpe:2.3:o:microsoft:windows_10_1809 |
| microsoft | windows 10 20h2 | cpe:2.3:o:microsoft:windows_10_20h2 |
| microsoft | windows 10 21h2 | cpe:2.3:o:microsoft:windows_10_21h2 |
| microsoft | windows 10 22h2 | cpe:2.3:o:microsoft:windows_10_22h2 |
| microsoft | windows 11 21h2 | cpe:2.3:o:microsoft:windows_11_21h2 |
| microsoft | windows 11 22h2 | cpe:2.3:o:microsoft:windows_11_22h2 |
| microsoft | windows server 2008 | cpe:2.3:o:microsoft:windows_server_2008 |
| microsoft | windows server 2012 | cpe:2.3:o:microsoft:windows_server_2012 |
| microsoft | windows server 2016 | cpe:2.3:o:microsoft:windows_server_2016 |
| microsoft | windows server 2022 | cpe:2.3:o:microsoft:windows_server_2022 |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- microsoft windows server 2008all versions
- microsoft windows server 2008r2
- microsoft windows server 2012all versions
- microsoft windows server 2012r2
- microsoft windows server 2016all versions
- microsoft windows server 2022all versions
Versions reported by the vendor
Affected version ranges reported by the assigning authority (microsoft). Independent of NVD's CPE analysis and usually ahead of it.
Microsoft Windows 10 Version 1507
- 10.0.10240.0 and later · before 10.0.10240.19926affected
Microsoft Windows 10 Version 1607
- 10.0.14393.0 and later · before 10.0.14393.5921affected
Microsoft Windows 10 Version 1809
- 10.0.17763.0 and later · before 10.0.17763.4377affected
- 10.0.0 and later · before 10.0.17763.4377affected
Microsoft Windows 10 Version 20H2
- 10.0.0 and later · before 10.0.19042.2965affected
Microsoft Windows 10 Version 21H2
- 10.0.19043.0 and later · before 10.0.19044.2965affected
Microsoft Windows 10 Version 22H2
- 10.0.19045.0 and later · before 10.0.19045.2965affected
Microsoft Windows 11 version 21H2
- 10.0.0 and later · before 10.0.22000.1936affected
Microsoft Windows 11 version 22H2
- 10.0.22621.0 and later · before 10.0.22621.1702affected
Microsoft Windows Server 2008 Service Pack 2
- 6.0.6003.0 and later · before 6.0.6003.22070affected
Microsoft Windows Server 2008 R2 Service Pack 1
- 6.1.7601.0 and later · before 6.1.7601.26519affected
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation)
- 6.1.7601.0 and later · before 6.1.7601.26519affected
Microsoft Windows Server 2008 Service Pack 2
- 6.0.6003.0 and later · before 6.0.6003.22070affected
Same product
microsoft: all recordsOther highest-scoring records for the same primary product.
- CVE-2021-34527Windows Print Spooler Remote Code Execution VulnerabilityKEV95Now
- CVE-2021-40444Microsoft MSHTML Remote Code Execution VulnerabilityKEV94Now
- CVE-2025-33053Internet Shortcut Files Remote Code Execution VulnerabilityKEV91Now
- CVE-2023-36025Windows SmartScreen Security Feature Bypass VulnerabilityKEV91Now
- CVE-2022-30190Microsoft Windows Support Diagnostic Tool (MSDT) Remote Code Execution VulnerabilityKEV91Now
- CVE-2017-8543Microsoft Windows XP SP3, Windows XP x64 XP2, Windows Server 2003 SP2, Windows Vista, Windows 7 SP1, Windows Server 2008 SP2 and R2 SP1, WinKEV91Now
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
Proof of concept available
A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.
Evidence
- Proof-of-concept repository on GitHub ×1
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Proof-of-concept repository on GitHub | stars:2 | 2023-05-13 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- Published
- First PoC+3 d
- TodaySep 30, 2026+1240 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- low · data or configuration can be modified
- Availability
- low · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- Low
- Availability impact
- Low
Weakness class (CWE)
CWE-73 · External Control of File Name or PathCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Subverting Environment Variable ValuesCAPEC-13likelihood: High · Very High
- Leverage Alternate EncodingCAPEC-267likelihood: High · High
- Using Slashes and URL Encoding Combined to Bypass Validation LogicCAPEC-64likelihood: High · High
- URL EncodingCAPEC-72likelihood: High · High
- Manipulating Web Input to File System CallsCAPEC-76likelihood: High · Very High
- Using Escaped Slashes in Alternate EncodingCAPEC-78likelihood: High · High
- Using Slashes in Alternate EncodingCAPEC-79likelihood: High · High
- Using UTF-8 Encoding to Bypass Validation LogicCAPEC-80likelihood: High · High
Change log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.