What is CVE-2017-0238?

CVE-2017-0238 is a high-severity vulnerability in Microsoft Edge, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2017-05-12.

How severe is CVE-2017-0238?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2017-0238 known to be exploited?

4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Microsoft Edge

CVE-2017-0238

A remote code execution vulnerability exists in Microsoft browsers in the way JavaScript scripting engines handle objects in memory, aka "Scripting Engine Memory Corruption Vulnerability." This CVE ID is unique from CVE-2017-0224, CVE-2017-0228, CVE-2017-0229, CVE-2017-0230, CVE-2017-0234, CVE-2017-0235, and CVE-2017-0236.

Vulnerability class: Buffer Overflow

Published 2017-05-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.181 (97.1th percentile), scored 2026-10-06.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 97.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.181 · newest: 0.181 · change: 0.000

Affected products

Microsoft Edge
Microsoft Internet Explorer — versions 9, 10, 11
Microsoft Corporation Browsers — versions Windows Server 2008 for 32-bit Systems Service Pack 2, Windows Server 2008 for x64-based Systems Service Pack 2, Windows 8.1 for 32-bit systems, Windows 8.1 for x64-based systems, Windows RT 8.1, Windows Server 2012, Windows Server 2012 R2, Windows 10 for 32-bit Systems, Windows 10 for x64-based Systems, Windows 10 Version 1511 for 32-bit Systems, Windows 10 Version 1511 for x64-based Systems, Windows 10 Version 1607 for 32-bit Systems, Windows 10 Version 1607 for x64-based Systems, Windows 10 Version 1703 for 32-bit Systems, and Windows 10 Version 1703 for x64-based Systems, and Windows Server 2016.

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

Public proof-of-concept exploits

References

portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0238 (Patch, Vendor Advisory)
www.securityfocus.com/bid/98237 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2017-0238?: CVE-2017-0238 is a high-severity vulnerability in Microsoft Edge, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2017-05-12.
How severe is CVE-2017-0238?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2017-0238 known to be exploited?: 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.