Security Resilience

CVE-2018-8653

Memory Safety in Microsoft Internet Explorer 10 … 9

CISA KEVActive ExploitationEUVD ExploitedMemory Safety
Published
20 December 2018
Modified
29 October 2025
KEV Added
03 November 2021
Patch / advisory
View advisory
CVSS Score v3.1 7.5
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS Score 0.30 98th percentile
Risk Priority 82 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2018-8653 is a high-severity Out-of-bounds Write (CWE-787) vulnerability in Microsoft Internet Explorer. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Security Account Manager (T1003.002); ranked in the top 2% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

A remote code execution vulnerability exists in the scripting engine's handling of objects in memory within Internet Explorer, resulting in memory corruption classified under CWE-787. The issue affects Internet Explorer 9, Internet Explorer 10, and Internet Explorer 11, and is distinct from the related CVE-2018-8643. It carries a CVSS 3.1 score of 7.5 reflecting network attack vector, high attack complexity, no required privileges, and required user interaction.

An unauthenticated remote attacker can exploit the flaw by serving malicious content that triggers the memory corruption when rendered in a vulnerable IE instance. Successful exploitation grants the ability to execute arbitrary code with the privileges of the current user, potentially leading to full confidentiality, integrity, and availability impacts on the affected system.

Microsoft's security advisory and the CISA Known Exploited Vulnerabilities catalog reference available patches and mitigations for this issue, confirming observed real-world exploitation activity.

EU & UK References

Vulnerability Data

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…

more

is unique from CVE-2018-8643.

CWE(s)
CWE-787
KEV Date Added
03 November 2021

Related Threats

MITRE ATT&CK Enterprise Techniques

T1003.002 Security Account Manager Credential Access
Adversaries may attempt to extract credential material from the Security Account Manager (SAM) database either through in-memory techniques or through the Windows Registry where the SAM database is stored.
attack.mitre.org →
T1003.004 LSA Secrets Credential Access
Adversaries with SYSTEM access to a host may attempt to access Local Security Authority (LSA) secrets, which can contain a variety of different credential materials, such as credentials for service accounts.
attack.mitre.org →
T1003.008 /etc/passwd and /etc/shadow Credential Access
Adversaries may attempt to dump the contents of <code>/etc/passwd</code> and <code>/etc/shadow</code> to enable offline password cracking.
attack.mitre.org →
T1006 Direct Volume Access Stealth
Adversaries may directly access a volume to bypass file access controls and file system monitoring.
attack.mitre.org →
T1007 System Service Discovery Discovery
Adversaries may try to gather information about registered local system services.
attack.mitre.org →
T1012 Query Registry Discovery
Adversaries may interact with the Windows Registry to gather information about the system, configuration, and installed software.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2019-1367Same product: Microsoft Internet Explorerboth on KEV
CVE-2018-8373Same product: Microsoft Internet Explorerboth on KEV
CVE-2020-0968Same product: Microsoft Internet Explorerboth on KEV
CVE-2020-1380Same product: Microsoft Internet Explorerboth on KEV
CVE-2018-8174Same product: Microsoft Windows 10 1607both on KEV
CVE-2020-0878Same product: Microsoft Internet Explorerboth on KEV
CVE-2020-1020Same product: Microsoft Windows 10 1507both on KEV
CVE-2017-0222Same product: Microsoft Internet Explorerboth on KEV
CVE-2020-1054Same product: Microsoft Windows 10 1507both on KEV
CVE-2020-0938Same product: Microsoft Windows 10 1507both on KEV

Affected Assets

microsoft
internet explorer
10, 11, 9

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-16 Memory Protection
addresses: CWE-787

Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

ID.RA-01 partial match
blocks

Vulnerability scanning and recording can discover out-of-bounds write flaws so they can be remediated.

PR.PS-02 partial match
blocks

Patching or replacing vulnerable software directly eliminates known instances of this coding weakness.

PR.PS-06 partial match
blocks

Secure-development practices (static analysis, bounds checking, code review) are the primary means of preventing out-of-bounds writes.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.5.14 Information transfer partial match
removes
A.5.15 Access control partial match
removes
A.5.16 Identity management partial match
removes
A.5.17 Authentication information partial match
removes
A.5.18 Access rights partial match
removes
A.7.2 Physical entry partial match
removes

References