SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2018-8288

A remote code execution vulnerability exists in the way the scripting engine handles objects in memory in Microsoft browsers, aka "Scripting Engine Memory Corruption Vulnerability." This affects ChakraCore, Internet Explorer 11, Microsoft Edge.

EXPLOIT ✓HIGH 7.5EPSS 69.2%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 69.2%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.

Description

A remote code execution vulnerability exists in the way the scripting engine handles objects in memory in Microsoft browsers, aka "Scripting Engine Memory Corruption Vulnerability." This affects ChakraCore, Internet Explorer 11, Microsoft Edge. This CVE ID is unique from CVE-2018-8242, CVE-2018-8283, CVE-2018-8287, CVE-2018-8291, CVE-2018-8296, CVE-2018-8298.

CVSS 3.0
7.5 HIGHCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
69.22% probability · 99th percentile
Public exploits
1 in Exploit-DB · verified · first 17 August 2018
CISA KEV
Not listed
Weakness
CWE-787
Affected
microsoft/internet explorer · microsoft/edge · microsoft/chakracore
Source
secure@microsoft.com
EPSS trend
0%35%70%21 September 2026: 62.48%22 September 2026: 69.01%27 October 2026: 69.22%21 September 202627 October 2026

EPSS moved from 62.5% on 21 September 2026 to 69.2% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.

Public exploits (1)

Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.

EDB-IDTitleTypePublishedVerified
EDB-45213source ↗Microsoft Edge Chakra JIT - ImplicitCallFlags Check Bypass with Intlwindows · Google Security Researchdos17 August 2018yes

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.