How severe is CVE-2021-26306?

CVE-2021-26306 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-2021-26306 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26306?

CVE-2021-26306 affects Raw-cpuid Project Raw-cpuid. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-26306?

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-2021-26306 published?

CVE-2021-26306 was published on 2021-01-29 and last updated on 2026-06-17.

CVE-2021-26306

CVE-2021-26306 is a high-severity vulnerability in Raw-cpuid Project Raw-cpuid 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.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Raw-cpuid Project Raw-cpuid
Published: 2021-01-29
Last modified: 2026-06-17

Description

An issue was discovered in the raw-cpuid crate before 9.0.0 for Rust. It has unsound transmute calls within as_string() methods.

Frequently asked questions

What is CVE-2021-26306?: An issue was discovered in the raw-cpuid crate before 9.0.0 for Rust. It has unsound transmute calls within as_string() methods.
How severe is CVE-2021-26306?: CVE-2021-26306 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-2021-26306 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26306?: CVE-2021-26306 affects Raw-cpuid Project Raw-cpuid. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-26306?: 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-2021-26306 published?: CVE-2021-26306 was published on 2021-01-29 and last updated on 2026-06-17.

References

https://rustsec.org/advisories/RUSTSEC-2021-0013.html

Affected products (1)

cpe:2.3:a:raw-cpuid_project:raw-cpuid:*:*:*:*:*:rust:*:*

More vulnerabilities in Raw-cpuid Project Raw-cpuid

CVE-2021-45687 — Critical (CVSS 9.8): An issue was discovered in the raw-cpuid crate before 9.1.1 for Rust. If the serialize feature is used (which is not…
CVE-2021-26307 — Medium (CVSS 5.5): An issue was discovered in the raw-cpuid crate before 9.0.0 for Rust. It allows __cpuid_count() calls even if the…

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