How severe is CVE-2021-40400?

CVE-2021-40400 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-40400 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-40400?

CVE-2021-40400 primarily affects Gerbv Project Gerbv. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-40400?

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-2021-40400 published?

CVE-2021-40400 was published on 2022-04-14 and last updated on 2026-06-17.

CVE-2021-40400

CVE-2021-40400 is a high-severity vulnerability in Gerbv Project Gerbv with a CVSS 3.x base score of 7.5. 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-125.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Gerbv Project Gerbv
Published: 2022-04-14
Last modified: 2026-06-17

Description

An out-of-bounds read vulnerability exists in the RS-274X aperture macro outline primitive functionality of Gerbv 2.7.0 and dev (commit b5f1eacd) and the forked version of Gerbv (commit d7f42a9a). A specially-crafted Gerber file can lead to information disclosure. An attacker can provide a malicious file to trigger this vulnerability.

Frequently asked questions

What is CVE-2021-40400?: An out-of-bounds read vulnerability exists in the RS-274X aperture macro outline primitive functionality of Gerbv 2.7.0 and dev (commit b5f1eacd) and the forked version of Gerbv (commit d7f42a9a). A specially-crafted Gerber file can lead to information disclosure. An attacker can provide a malicious file to trigger this vulnerability.
How severe is CVE-2021-40400?: CVE-2021-40400 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-40400 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-40400?: CVE-2021-40400 primarily affects Gerbv Project Gerbv. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-40400?: 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-2021-40400 published?: CVE-2021-40400 was published on 2022-04-14 and last updated on 2026-06-17.

References

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1413

Affected products (2)

cpe:2.3:a:gerbv_project:gerbv:2.7.0:-:*:*:*:*:*:*
cpe:2.3:a:gerbv_project:gerbv:2.7.0:dev:*:*:*:*:*:*

More vulnerabilities in Gerbv Project Gerbv

CVE-2021-40394 — Critical (CVSS 9.8): An out-of-bounds write vulnerability exists in the RS-274X aperture macro variables handling functionality of Gerbv…
CVE-2021-40393 — Critical (CVSS 9.8): An out-of-bounds write vulnerability exists in the RS-274X aperture macro variables handling functionality of Gerbv…
CVE-2021-40391 — Critical (CVSS 9.8): An out-of-bounds write vulnerability exists in the drill format T-code tool number functionality of Gerbv 2.7.0, dev…
CVE-2021-40401 — High (CVSS 8.6): A use-after-free vulnerability exists in the RS-274X aperture definition tokenization functionality of Gerbv 2.7.0 and…
CVE-2021-40402 — High (CVSS 7.5): An out-of-bounds read vulnerability exists in the RS-274X aperture macro multiple outline primitives functionality of…
CVE-2021-40403 — Medium (CVSS 6.3): An information disclosure vulnerability exists in the pick-and-place rotation parsing functionality of Gerbv 2.7.0 and…

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CVE-2017-14451 — Critical (CVSS 10.0): An exploitable out-of-bounds read vulnerability exists in libevm (Ethereum Virtual Machine) of CPP-Ethereum. A…
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