How severe is CVE-2018-8283?

CVE-2018-8283 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-8283 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 14% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-8283?

CVE-2018-8283 affects Microsoft Chakracore. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-8283?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-8283 published?

CVE-2018-8283 was published on 2018-07-11 and last updated on 2026-06-17.

CVE-2018-8283

CVE-2018-8283 is a high-severity vulnerability in Microsoft Chakracore with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 14% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-787.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 7.6
EPSS exploit prediction: 14% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Microsoft Chakracore
Published: 2018-07-11
Last modified: 2026-06-17

Description

A remote code execution vulnerability exists in the way that the ChakraCore scripting engine handles objects in memory, aka "Scripting Engine Memory Corruption Vulnerability." This affects ChakraCore. This CVE ID is unique from CVE-2018-8242, CVE-2018-8287, CVE-2018-8288, CVE-2018-8291, CVE-2018-8296, CVE-2018-8298.

Frequently asked questions

What is CVE-2018-8283?: A remote code execution vulnerability exists in the way that the ChakraCore scripting engine handles objects in memory, aka "Scripting Engine Memory Corruption Vulnerability." This affects ChakraCore. This CVE ID is unique from CVE-2018-8242, CVE-2018-8287, CVE-2018-8288, CVE-2018-8291, CVE-2018-8296, CVE-2018-8298.
How severe is CVE-2018-8283?: CVE-2018-8283 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-8283 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 14% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-8283?: CVE-2018-8283 affects Microsoft Chakracore. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-8283?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-8283 published?: CVE-2018-8283 was published on 2018-07-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:microsoft:chakracore:*:*:*:*:*:*:*:*

More vulnerabilities in Microsoft Chakracore

CVE-2018-8500 — Critical (CVSS 9.8): A remote code execution vulnerability exists in the way that the ChakraCore scripting engine handles objects in memory,…
CVE-2017-11767 — Critical (CVSS 9.8): ChakraCore allows an attacker to gain the same user rights as the current user, due to the way that the ChakraCore…
CVE-2017-8658 — Critical (CVSS 9.8): A remote code execution vulnerability exists in the way that the Chakra JavaScript engine renders when handling objects…
CVE-2020-1555 — High (CVSS 8.8): A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in…
CVE-2020-1073 — High (CVSS 8.1): A remote code execution vulnerability exists in the way that the ChakraCore scripting engine handles objects in memory,…
CVE-2019-0649 — High (CVSS 8.1): A vulnerability exists in Microsoft Chakra JIT server, aka 'Scripting Engine Elevation of Privileged Vulnerability'.

All CVEs affecting Microsoft Chakracore →

Other CWE-787 (Out-of-bounds Write) vulnerabilities

CVE-2026-42369 — Critical (CVSS 10.0): GV-VMS V20 is a Video Monitoring Software used to gather the feeds of many surveillance cameras and manage other…
CVE-2026-4746 — Critical (CVSS 10.0): Out-of-bounds Write vulnerability in timeplus-io proton (base/poco/Foundation/src‎ modules). This vulnerability is…
CVE-2025-43300 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 15.8.5 and iPadOS…
CVE-2025-24201 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved checks to prevent unauthorized actions. This issue is fixed in…
CVE-2024-42479 — Critical (CVSS 10.0): llama.cpp provides LLM inference in C/C++. The unsafe `data` pointer member in the `rpc_tensor` structure can cause…
CVE-2024-39791 — Critical (CVSS 10.0): Stack-based buffer overflow vulnerabilities affecting Vonets industrial wifi bridge relays and wifi bridge…

Browse all CWE-787 (Out-of-bounds Write) vulnerabilities →