CVE-2020-17131: microsoft chakracore Out-of-bounds Write
CVSS: 5.1v2.0MediumModified
AliasesGHSA-qwwg-gc55-qqrv
Published 09-12-2020Last modified 09-06-2026
Vulnerability summary
CVE-2020-17131 is a medium (CVSS 5.1) Out-of-bounds Write vulnerability in microsoft chakracore. EPSS estimates a 2.04% chance of exploitation in the next 30 days, higher than 80.9% of scored vulnerabilities.
CVSS score
5.1/10
010
Medium · v2.0 (NVD)EPSS score
2.04%
0%100%
Low · +0.15 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 09-12-2020PublishedVulnerability first disclosed.
- 09-06-2026Last modifiedVulnerability information updated.
Description
Chakra Scripting Engine Memory Corruption Vulnerability
CVSS metrics
4 scores · 3 sources · 2 versionsMedium 4.2Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N/E:P/RL:O/RC:CSources3 sources · 4.2–7.5
- OSV · NugetEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:HDiffers
- NVDNIST4.2MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
Medium 5.1Preferred score · NVD (NIST)
AV:N/AC:H/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
2.04%
Chance of exploitation in the next 30 days
Percentile
81%
Versus all other CVEs
30-day change
+0.15 pp
From 1.89% on 20-09-2026
20-09-202620-10-2026
EPSS score2.04%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Microsoft3 products
- chakracore< publication | < 1.11.0
- edgena
- microsoft edge (edgehtml-based)≥ 1.0..0, < publication
NuGet1 product
- Microsoft.ChakraCore< 1.11.24
2 vendors · 4 products
References
5 links
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17131X Refsource MISCX TransferredPatchVendor Advisory
