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UK Cyber Defence
VulnerabilityModified

CVE-2018-8353

A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer, aka "Scripting Engine Memory Corruption Vulnerability." This affects Internet Explorer 9, Internet Explorer 11, Internet…

EXPLOIT ✓HIGH 7.5EPSS 67.3%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 67.3%, 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 that the scripting engine handles objects in memory in Internet Explorer, aka "Scripting Engine Memory Corruption Vulnerability." This affects Internet Explorer 9, Internet Explorer 11, Internet Explorer 10. This CVE ID is unique from CVE-2018-8355, CVE-2018-8359, CVE-2018-8371, CVE-2018-8372, CVE-2018-8373, CVE-2018-8385, CVE-2018-8389, CVE-2018-8390.

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
67.34% probability · 99th percentile
Public exploits
1 in Exploit-DB · verified · first 28 August 2018
CISA KEV
Not listed
Weakness
CWE-416
Affected
microsoft/internet explorer
Source
secure@microsoft.com
EPSS trend
0%35%70%21 September 2026: 62.65%22 September 2026: 67.69%27 October 2026: 67.34%21 September 202627 October 2026

EPSS moved from 62.6% on 21 September 2026 to 67.3% on 27 October 2026, peaking at 67.7% on 22 September 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-45279source ↗Microsoft Windows - JScript RegExp.lastIndex Use-After-Freewindows · Google Security Researchdos28 August 2018yes

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