How severe is CVE-2020-27173?

CVE-2020-27173 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 none, integrity none, and availability high.

Is CVE-2020-27173 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-27173?

CVE-2020-27173 affects Vm-superio Project Vm-superio. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-27173?

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-2020-27173 published?

CVE-2020-27173 was published on 2020-10-16 and last updated on 2026-06-17.

CVE-2020-27173

CVE-2020-27173 is a high-severity vulnerability in Vm-superio Project Vm-superio 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-770.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-770
Affected product: Vm-superio Project Vm-superio
Published: 2020-10-16
Last modified: 2026-06-17

Description

In vm-superio before 0.1.1, the serial console FIFO can grow to unlimited memory usage when data is sent to the input source (i.e., standard input). This behavior cannot be reproduced from the guest side. When no rate limiting is in place, the host can be subject to memory pressure, impacting all other VMs running on the same host.

Frequently asked questions

What is CVE-2020-27173?: In vm-superio before 0.1.1, the serial console FIFO can grow to unlimited memory usage when data is sent to the input source (i.e., standard input). This behavior cannot be reproduced from the guest side. When no rate limiting is in place, the host can be subject to memory pressure, impacting all other VMs running on the same host.
How severe is CVE-2020-27173?: CVE-2020-27173 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 none, integrity none, and availability high.
Is CVE-2020-27173 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-27173?: CVE-2020-27173 affects Vm-superio Project Vm-superio. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-27173?: 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-2020-27173 published?: CVE-2020-27173 was published on 2020-10-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:vm-superio_project:vm-superio:*:*:*:*:*:*:*:*

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