How severe is CVE-2018-20343?

CVE-2018-20343 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-20343 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-20343?

CVE-2018-20343 affects Advsys Build Engine. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-20343?

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-2018-20343 published?

CVE-2018-20343 was published on 2020-03-02 and last updated on 2026-06-17.

CVE-2018-20343

CVE-2018-20343 is a high-severity vulnerability in Advsys Build Engine with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-120.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 6.8
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Advsys Build Engine
Published: 2020-03-02
Last modified: 2026-06-17

Description

Multiple buffer overflow vulnerabilities have been found in Ken Silverman Build Engine 1. An attacker could craft a special map file to execute arbitrary code when the map file is loaded.

Frequently asked questions

What is CVE-2018-20343?: Multiple buffer overflow vulnerabilities have been found in Ken Silverman Build Engine 1. An attacker could craft a special map file to execute arbitrary code when the map file is loaded.
How severe is CVE-2018-20343?: CVE-2018-20343 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-20343 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20343?: CVE-2018-20343 affects Advsys Build Engine. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-20343?: 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-2018-20343 published?: CVE-2018-20343 was published on 2020-03-02 and last updated on 2026-06-17.

References

https://github.com/Alexandre-Bartel/CVE-2018-20343

Affected products (1)

cpe:2.3:a:advsys:build_engine:1.0:*:*:*:*:*:*:*

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