Microsoft Edge/ChakraCore Chakra Scripting Engine memory corruption
| CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
|---|---|---|
| 5.3 | $5k-$25k | 0.00 |
Summary
A vulnerability classified as critical has been found in Microsoft Edge and ChakraCore. Affected is an unknown function of the component Chakra Scripting Engine. This manipulation causes memory corruption. This vulnerability appears as CVE-2020-17131. The attack may be initiated remotely. There is no available exploit. It is recommended to apply a patch to fix this issue.
Details
A vulnerability has been found in Microsoft Edge and ChakraCore (Web Browser) (version now known) and classified as critical. Affected by this vulnerability is some unknown processing of the component Chakra Scripting Engine. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability.
The weakness was presented 12/08/2020 as confirmed security guidance (Website). It is possible to read the advisory at portal.msrc.microsoft.com. This vulnerability is known as CVE-2020-17131. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 08/29/2025).
It is declared as proof-of-concept.
Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.
Be aware that VulDB is the high quality source for vulnerability data.
Product
Type
Vendor
Name
License
Website
- Vendor: https://www.microsoft.com/
CPE 2.3
CPE 2.2
CVSSv4
VulDB Vector: 🔍VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 5.6VulDB Meta Temp Score: 5.3
VulDB Base Score: 6.3
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍
Vendor Base Score (Microsoft): 4.2
Vendor Vector (Microsoft): 🔍
NVD Base Score: 7.5
NVD Vector: 🔍
CNA Base Score: 4.2
CNA Vector: 🔍
CVSSv2
| AV | AC | Au | C | I | A |
|---|---|---|---|---|---|
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Memory corruptionCWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍
Physical: No
Local: No
Remote: Yes
Availability: 🔍
Status: Proof-of-Concept
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
| 0-Day | Unlock | Unlock | Unlock | Unlock |
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| Today | Unlock | Unlock | Unlock | Unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: PatchStatus: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Timeline
08/04/2020 🔍12/08/2020 🔍
12/08/2020 🔍
12/09/2020 🔍
08/29/2025 🔍
Sources
Vendor: microsoft.comAdvisory: portal.msrc.microsoft.com
Status: Confirmed
CVE: CVE-2020-17131 (🔍)
GCVE (CVE): GCVE-0-2020-17131
GCVE (VulDB): GCVE-100-165703
Entry
Created: 12/09/2020 01:36Updated: 08/29/2025 04:53
Changes: 12/09/2020 01:36 (25), 12/09/2020 01:37 (7), 12/09/2020 01:40 (21), 12/13/2020 12:59 (2), 08/29/2025 04:53 (42)
Complete: 🔍
Cache ID: 216::103
Be aware that VulDB is the high quality source for vulnerability data.
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