Security readout for executives and security teams
CVE-2020-23257 is a buffer overflow in Espruino 2v05.41 that can crash or disrupt affected systems. The reported impact is denial of service, not data theft or code execution. Business urgency depends on whether Espruino-based devices or services are reachable by untrusted users or networks. Exposure is most likely where Espruino 2v05.41 is deployed on embedded or JavaScript-enabled devices reachable over a network. The CVE affected-product metadata is incomplete, so teams must verify exposure through asset and firmware inventory. Treat this as a high-priority availability risk for exposed Espruino deployments, especially embedded devices supporting operational workflows. Prioritize inventory and isolation first because source metadata does not provide complete affected-product or remediation details. Mitigation focus: Check Espruino vendor guidance and issue 1820 for fixed versions or workarounds.; Upgrade affected Espruino builds when an official fixed release is identified.; Restrict network access to Espruino consoles, APIs, or device management interfaces..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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Open ATT&CK lookupCVE-2020-23257 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
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CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/espruino/Espruino/issues/1820CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.