CVE-2018-0818 — Microsoft ChakraCore allows an attacker to bypass Control Flow Guard (CFG) in conjunction with another vulnerability to run arbitrary code on a target system, due to how the Chakra scripting engine handles accessing memory, aka "Scripting Engine Security Feature Bypass"

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HIGH

Microsoft ChakraCore allows an attacker to bypass Control Flow Guard (CFG) in conjunction with another vulnerability to run arbitrary code on a target system, due to how the Chakra scripting engine handles accessing memory, aka "Scripting Engine Security Feature Bypass"

Published Jan 10, 2018

7.5

HIGH

CVSS 3.0

EPSS 3.69%

Description

Microsoft ChakraCore allows an attacker to bypass Control Flow Guard (CFG) in conjunction with another vulnerability to run arbitrary code on a target system, due to how the Chakra scripting engine handles accessing memory, aka "Scripting Engine Security Feature Bypass".

Affected products

Vendor Microsoft Corporation Product ChakraCore Default
n/a
- Version
  ChakraCore
  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 Corporation

ChakraCore

n/a

Version	Status	Constraints
ChakraCore	affected	-

Remediation

No remediation recorded yet.

Metrics

3.69% 0.03686

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

EPSS probability 0.03686

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 (22 key points)

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

Date	Score	Percentile	Model
Oct 1, 2026	3.69% (0.03686)	89.34th	v5 (v2026.06.15)
Jun 15, 2026	3.76% (0.03757)	88.44th	v5 (v2026.06.15)
Jan 3, 2026	27.26% (0.27262)	96.26th	v4 (v2025.03.14)
Nov 21, 2025	14.73% (0.14729)	94.22th	v4 (v2025.03.14)
Nov 18, 2025	27.26% (0.27262)	96.11th	v4 (v2025.03.14)
Jun 28, 2025	15.37% (0.15373)	94.30th	v4 (v2025.03.14)
May 31, 2025	12.54% (0.12542)	93.55th	v4 (v2025.03.14)
May 4, 2025	8.17% (0.08174)	91.70th	v4 (v2025.03.14)
Mar 30, 2025	6.19% (0.06190)	89.90th	v4 (v2025.03.14)
Mar 29, 2025	14.49% (0.14490)	90.76th	v4 (v2025.03.14)
Mar 17, 2025	6.19% (0.06190)	90.15th	v4 (v2025.03.14)
Dec 12, 2024	0.22% (0.00225)	61.68th	v3 (v2023.03.01)
Jun 2, 2023	0.22% (0.00225)	59.44th	v3 (v2023.03.01)
Mar 7, 2023	0.27% (0.00273)	62.90th	v3 (v2023.03.01)
Mar 6, 2023	5.71% (0.05708)	90.31th	v2 (v2022.01.01)
May 2, 2022	5.71% (0.05708)	89.42th	v2 (v2022.01.01)
Apr 1, 2022	5.20% (0.05203)	88.64th	v2 (v2022.01.01)
Feb 4, 2022	5.20% (0.05203)	75.22th	v2 (v2022.01.01)
Feb 3, 2022	6.70% (0.06701)	83.28th	v1
Jan 6, 2022	6.70% (0.06701)	83.12th	v1
Sep 1, 2021	6.70% (0.06701)	91.08th	v1
Apr 14, 2021	6.70% (0.06701)	0.00th	v1

Weaknesses (0)

No CWE recorded.

References (7)

http://www.securityfocus.com/bid/102412
vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
https://github.com/advisories/GHSA-fv8m-p45w-gf38
Advisory
https://github.com/chakra-core/ChakraCore/pull/4427
https://github.com/chakra-core/ChakraCore/pull/4427/commits/84368681cf5cf1d33364638e2cd463ad1b13eba6
https://nvd.nist.gov/vuln/detail/CVE-2018-0818
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0818
x_refsource_CONFIRMVendor Advisory
https://web.archive.org/web/20210124130147/http://www.securityfocus.com/bid/102412

Link	Providers	Tags
http://www.securityfocus.com/bid/102412		vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
https://github.com/advisories/GHSA-fv8m-p45w-gf38		Advisory
https://github.com/chakra-core/ChakraCore/pull/4427
https://github.com/chakra-core/ChakraCore/pull/4427/commits/84368681cf5cf1d33364638e2cd463ad1b13eba6
https://nvd.nist.gov/vuln/detail/CVE-2018-0818
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0818		x_refsource_CONFIRMVendor Advisory
https://web.archive.org/web/20210124130147/http://www.securityfocus.com/bid/102412