CVE-2017-0037
HighExploitedPublic exploitMicrosoft Internet Explorer 10 and 11 and Microsoft Edge have a type confusion issue in the Layout::MultiColumnBoxBuilder::HandleColumnBreakOnColumnSpanningElement function in mshtml.dll, which allows remote attackers to execute arbitrary code via vectors involving a crafted…
Published Feb 26, 2017 · Updated Apr 22, 2026
Key Facts
Patch immediately- CVE-2017-0037 is a high-severity vulnerability (CVSS 8.1 v3.1) affecting Edge (Microsoft), Internet Explorer (Microsoft), Internet Browser.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Aug 30, 2017. Public exploit code is available.
- EPSS estimates a 80% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
8.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
80%
Higher than 99.6% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2017-0037 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Microsoft Internet Explorer 10 and 11 and Microsoft Edge have a type confusion issue in the Layout::MultiColumnBoxBuilder::HandleColumnBreakOnColumnSpanningElement function in mshtml.dll, which allows remote attackers to execute arbitrary code via vectors involving a crafted Cascading Style Sheets (CSS) token sequence and crafted JavaScript code that operates on a TH element.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Mar 28, 2022 | Apr 18, 2022 | Not reported |
| Industry KEV feed | Aug 30, 2017 | Apr 18, 2022 | Not reported |
| CIRCL KEV | Mar 28, 2022 | Apr 18, 2022 | Not reported |
| ENISA EUVD | Mar 28, 2022 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| EdgeMicrosoft | See advisory | n/a |
| Internet ExplorerMicrosoft | 11 | n/a |
| Internet Browser | >= Internet Explorer 10 and 11 and Edge | n/a |
Timeline
Publicly disclosed
Feb 26, 2017
Added to Industry KEV feed
Aug 30, 2017
Added to CISA KEV
Mar 28, 2022
Added to CIRCL KEV
Mar 28, 2022
Added to ENISA EUVD
Mar 28, 2022
Last updated
Apr 22, 2026
Weakness Type
- CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')
References
- advisory96088
- advisory1037905
- advisory1037906
- patchhttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0037
- exploithttps://0patch.blogspot.si/2017/03/0patching-another-0-day-internet.html
FAQ
Common Questions.
Microsoft Internet Explorer 10 and 11 and Microsoft Edge have a type confusion issue in the Layout::MultiColumnBoxBuilder::HandleColumnBreakOnColumnSpanningElement function in mshtml.dll, which allows remote attackers to execute arbitrary code via vectors involving a crafted Cascading Style Sheets (CSS) token sequence…
Affected: Edge (Microsoft); Internet Explorer (Microsoft) versions 11; Internet Browser versions >= Internet Explorer 10 and 11 and Edge. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Aug 30, 2017.
Yes. It was added on Mar 28, 2022 with a federal remediation due date of Apr 18, 2022.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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