How severe is CVE-2020-10639?

CVE-2020-10639 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-2020-10639 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-10639?

CVE-2020-10639 affects Eaton Hmisoft Vu3 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-10639?

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-2020-10639 published?

CVE-2020-10639 was published on 2020-04-15 and last updated on 2026-06-17.

CVE-2020-10639

CVE-2020-10639 is a high-severity vulnerability in Eaton Hmisoft Vu3 Firmware 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: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Eaton Hmisoft Vu3 Firmware
Published: 2020-04-15
Last modified: 2026-06-17

Description

Eaton HMiSoft VU3 (HMIVU3 runtime not impacted), Version 3.00.23 and prior, however, the HMIVU runtimes are not impacted by these issues. A specially crafted input file could cause a buffer overflow when loaded by the affected product.

Frequently asked questions

What is CVE-2020-10639?: Eaton HMiSoft VU3 (HMIVU3 runtime not impacted), Version 3.00.23 and prior, however, the HMIVU runtimes are not impacted by these issues. A specially crafted input file could cause a buffer overflow when loaded by the affected product.
How severe is CVE-2020-10639?: CVE-2020-10639 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-2020-10639 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-10639?: CVE-2020-10639 affects Eaton Hmisoft Vu3 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-10639?: 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-2020-10639 published?: CVE-2020-10639 was published on 2020-04-15 and last updated on 2026-06-17.

References

https://www.us-cert.gov/ics/advisories/icsa-20-105-01

Affected products (1)

cpe:2.3:o:eaton:hmisoft_vu3_firmware:*:*:*:*:*:*:*:*

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