CVE-2018-8315 — An information disclosure vulnerability exists when the browser scripting engine improperly handle object types, aka "Microsoft Scripting Engine Information Disclosure Vulnerability." This affects ChakraCore, Internet Explorer 11, Microsoft Edge, Internet Explorer 10

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MEDIUM

An information disclosure vulnerability exists when the browser scripting engine improperly handle object types, aka "Microsoft Scripting Engine Information Disclosure Vulnerability." This affects ChakraCore, Internet Explorer 11, Microsoft Edge, Internet Explorer 10

Published Sep 13, 2018

4.2

MEDIUM

CVSS 3.0

EPSS 3.12%

Description

An information disclosure vulnerability exists when the browser scripting engine improperly handle object types, aka "Microsoft Scripting Engine Information Disclosure Vulnerability." This affects ChakraCore, Internet Explorer 11, Microsoft Edge, Internet Explorer 10.

Affected products

Vendor Microsoft Product ChakraCore Default
n/a
- Version
  ChakraCore
  Status
  affected
  Constraints
  -
Vendor Microsoft Product Internet Explorer 10 Default
n/a
- Version
  Windows Server 2012
  Status
  affected
  Constraints
  -
Vendor Microsoft Product Internet Explorer 11 Default
n/a
- Version
  Windows 10 Version 1607 for 32-bit Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 Version 1607 for x64-based Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 Version 1703 for 32-bit Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 Version 1703 for x64-based Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 Version 1709 for 32-bit Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 Version 1709 for x64-based Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 Version 1803 for 32-bit Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 Version 1803 for x64-based Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 for 32-bit Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 for x64-based Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 7 for 32-bit Systems Service Pack 1
  Status
  affected
  Constraints
  -
- Version
  Windows 7 for x64-based Systems Service Pack 1
  Status
  affected
  Constraints
  -
- Version
  Windows 8.1 for 32-bit systems
  Status
  affected
  Constraints
  -
- Version
  Windows 8.1 for x64-based systems
  Status
  affected
  Constraints
  -
- Version
  Windows RT 8.1
  Status
  affected
  Constraints
  -
- Version
  Windows Server 2008 R2 for x64-based Systems Service Pack 1
  Status
  affected
  Constraints
  -
- Version
  Windows Server 2012 R2
  Status
  affected
  Constraints
  -
- Version
  Windows Server 2016
  Status
  affected
  Constraints
  -
Vendor Microsoft Product Microsoft Edge Default
n/a
- Version
  Windows 10 Version 1607 for 32-bit Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 Version 1607 for x64-based Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 Version 1703 for 32-bit Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 Version 1703 for x64-based Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 Version 1709 for 32-bit Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 Version 1709 for x64-based Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 Version 1803 for 32-bit Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 Version 1803 for x64-based Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 for 32-bit Systems
  Status
  affected
  Constraints
  -
- Version
  Windows 10 for x64-based Systems
  Status
  affected
  Constraints
  -
- Version
  Windows Server 2016
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Microsoft

ChakraCore

n/a

Version	Status	Constraints
ChakraCore	affected	-

Microsoft

Internet Explorer 10

n/a

Version	Status	Constraints
Windows Server 2012	affected	-

Microsoft

Internet Explorer 11

n/a

Version	Status	Constraints
Windows 10 Version 1607 for 32-bit Systems	affected	-
Windows 10 Version 1607 for x64-based Systems	affected	-
Windows 10 Version 1703 for 32-bit Systems	affected	-
Windows 10 Version 1703 for x64-based Systems	affected	-
Windows 10 Version 1709 for 32-bit Systems	affected	-
Windows 10 Version 1709 for x64-based Systems	affected	-
Windows 10 Version 1803 for 32-bit Systems	affected	-
Windows 10 Version 1803 for x64-based Systems	affected	-
Windows 10 for 32-bit Systems	affected	-
Windows 10 for x64-based Systems	affected	-
Windows 7 for 32-bit Systems Service Pack 1	affected	-
Windows 7 for x64-based Systems Service Pack 1	affected	-
Windows 8.1 for 32-bit systems	affected	-
Windows 8.1 for x64-based systems	affected	-
Windows RT 8.1	affected	-
Windows Server 2008 R2 for x64-based Systems Service Pack 1	affected	-
Windows Server 2012 R2	affected	-
Windows Server 2016	affected	-

Microsoft

Microsoft Edge

n/a

Version	Status	Constraints
Windows 10 Version 1607 for 32-bit Systems	affected	-
Windows 10 Version 1607 for x64-based Systems	affected	-
Windows 10 Version 1703 for 32-bit Systems	affected	-
Windows 10 Version 1703 for x64-based Systems	affected	-
Windows 10 Version 1709 for 32-bit Systems	affected	-
Windows 10 Version 1709 for x64-based Systems	affected	-
Windows 10 Version 1803 for 32-bit Systems	affected	-
Windows 10 Version 1803 for x64-based Systems	affected	-
Windows 10 for 32-bit Systems	affected	-
Windows 10 for x64-based Systems	affected	-
Windows Server 2016	affected	-

Remediation

No remediation recorded yet.

Metrics

3.12% 0.03121

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.03121

Score over time

2021–2026

EPSS v1
EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v1
EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (37 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	3.12% (0.03121)	87.38th	v5 (v2026.06.15)
Sep 22, 2026	3.12% (0.03121)	87.27th	v5 (v2026.06.15)
Sep 21, 2026	4.79% (0.04792)	91.55th	v5 (v2026.06.15)
Sep 6, 2026	3.12% (0.03121)	86.98th	v5 (v2026.06.15)
Sep 5, 2026	4.79% (0.04792)	91.37th	v5 (v2026.06.15)
Aug 30, 2026	3.12% (0.03121)	86.91th	v5 (v2026.06.15)
Aug 28, 2026	4.79% (0.04792)	91.32th	v5 (v2026.06.15)
Aug 24, 2026	3.12% (0.03121)	86.83th	v5 (v2026.06.15)
Aug 23, 2026	4.79% (0.04792)	91.28th	v5 (v2026.06.15)
Jun 15, 2026	3.09% (0.03095)	85.99th	v5 (v2026.06.15)
Mar 30, 2026	5.65% (0.05649)	90.31th	v4 (v2025.03.14)
Feb 1, 2026	3.28% (0.03282)	86.92th	v4 (v2025.03.14)
Jan 5, 2026	1.82% (0.01817)	82.39th	v4 (v2025.03.14)
Mar 30, 2025	0.78% (0.00777)	71.38th	v4 (v2025.03.14)
Mar 29, 2025	2.28% (0.02277)	74.41th	v4 (v2025.03.14)
Mar 17, 2025	0.78% (0.00777)	71.95th	v4 (v2025.03.14)
Dec 17, 2024	1.74% (0.01744)	87.60th	v3 (v2023.03.01)
Jun 28, 2024	0.63% (0.00634)	79.23th	v3 (v2023.03.01)
May 2, 2024	0.75% (0.00748)	80.76th	v3 (v2023.03.01)
Feb 25, 2024	0.87% (0.00866)	81.85th	v3 (v2023.03.01)
Feb 3, 2024	0.91% (0.00907)	81.08th	v3 (v2023.03.01)
Sep 6, 2023	1.00% (0.01000)	81.75th	v3 (v2023.03.01)
Aug 22, 2023	1.03% (0.01025)	81.95th	v3 (v2023.03.01)
Jul 19, 2023	0.86% (0.00860)	80.09th	v3 (v2023.03.01)
Jul 8, 2023	0.91% (0.00907)	80.61th	v3 (v2023.03.01)
Mar 7, 2023	0.53% (0.00530)	73.49th	v3 (v2023.03.01)
Mar 6, 2023	6.42% (0.06416)	91.03th	v2 (v2022.01.01)
Jan 3, 2023	6.42% (0.06416)	90.61th	v2 (v2022.01.01)
Jul 26, 2022	5.85% (0.05853)	89.97th	v2 (v2022.01.01)
Jun 19, 2022	5.27% (0.05274)	89.02th	v2 (v2022.01.01)
Apr 1, 2022	4.79% (0.04794)	88.19th	v2 (v2022.01.01)
Mar 9, 2022	4.79% (0.04794)	74.96th	v2 (v2022.01.01)
Feb 4, 2022	4.00% (0.04004)	67.82th	v2 (v2022.01.01)
Feb 3, 2022	9.25% (0.09255)	86.70th	v1
Jan 6, 2022	9.25% (0.09255)	86.54th	v1
Sep 1, 2021	9.25% (0.09255)	93.94th	v1
Apr 14, 2021	9.25% (0.09255)	0.00th	v1

Weaknesses (1)

CWE-200

Exposure of Sensitive Information

References (9)

http://www.securityfocus.com/bid/105251
vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1041623
vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
https://github.com/advisories/GHSA-93c7-2942-3h47
Advisory
https://github.com/chakra-core/ChakraCore/commit/e03b3e30160ac5846b246931634962ce6bd1db83
https://github.com/chakra-core/ChakraCore/pull/5688
https://nvd.nist.gov/vuln/detail/CVE-2018-8315
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8315
x_refsource_CONFIRMPatchVendor Advisory
https://web.archive.org/web/20210124203128/http://www.securityfocus.com/bid/105251
https://web.archive.org/web/20211206083609/https://securitytracker.com/id/1041623

Link	Providers	Tags
http://www.securityfocus.com/bid/105251		vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1041623		vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
https://github.com/advisories/GHSA-93c7-2942-3h47		Advisory
https://github.com/chakra-core/ChakraCore/commit/e03b3e30160ac5846b246931634962ce6bd1db83
https://github.com/chakra-core/ChakraCore/pull/5688
https://nvd.nist.gov/vuln/detail/CVE-2018-8315
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8315		x_refsource_CONFIRMPatchVendor Advisory
https://web.archive.org/web/20210124203128/http://www.securityfocus.com/bid/105251
https://web.archive.org/web/20211206083609/https://securitytracker.com/id/1041623