CVE-2018-8275ChakraCore Out-of-Bounds Write
A remote code execution vulnerability exists when Microsoft Edge improperly accesses objects in memory, aka "Microsoft Edge Memory Corruption Vulnerability." This affects Microsoft Edge, ChakraCore.
Published Jul 10, 2018 · Updated Oct 20, 2026
Key Facts
Patch immediately- CVE-2018-8275 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting ChakraCore (Microsoft), Edge (Microsoft).
- It is exploited in the wild, listed in Industry KEV feed since Aug 17, 2021. No public exploit code is known.
- EPSS estimates a 21% probability of exploitation in the next 30 days.
- Fixed versions are available, including ChakraCore <=1.10.0, ChakraCore 1.10.0.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v3.1
7.5
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
21%
Higher than 97.5% of all scored CVEs
Exploit maturity
Exploited (KEV)
ATLAS score
48/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Aug 17, 2021
1134 days after publication
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Exploited (KEV)
Public exploit code
0
Proof-of-concept links
In-the-wild evidence
1
Reports of active use
Advisories And Exploit References
Description
A remote code execution vulnerability exists when Microsoft Edge improperly accesses objects in memory, aka "Microsoft Edge Memory Corruption Vulnerability." This affects Microsoft Edge, ChakraCore. This CVE ID is unique from CVE-2018-8125, CVE-2018-8262, CVE-2018-8274, CVE-2018-8279, CVE-2018-8301.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Aug 17, 2021 | n/a | Not reported |
Affected Products
4 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| ChakraCoreMicrosoft | >= ChakraCore | 1.10.0 |
| EdgeMicrosoft | >= Windows 10 Version 1607 for 32-bit Systems | n/a |
Patched Releases
ChakraCore
<=1.10.0
Timeline
Publicly disclosed
Jul 10, 2018
Added to Industry KEV feed
Aug 17, 2021
Last updated
Oct 20, 2026
Weakness Type
- CWE-787 Out-of-bounds Write
References
- advisory104632
- advisory1041256
- patchportal.msrc.microsoft.com · CVE-2018-8275
- exploitVulnCheck exploitation report
FAQ
Common Questions.
A remote code execution vulnerability exists when Microsoft Edge improperly accesses objects in memory, aka "Microsoft Edge Memory Corruption Vulnerability." This affects Microsoft Edge, ChakraCore.
Affected: ChakraCore (Microsoft) versions >= ChakraCore; Edge (Microsoft) versions >= Windows 10 Version 1607 for 32-bit Systems. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Aug 17, 2021.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including ChakraCore <=1.10.0, ChakraCore 1.10.0.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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