How severe is CVE-2021-25905?

CVE-2021-25905 has a CVSS 3.x base score of 9.1, rated critical 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 high.

Is CVE-2021-25905 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-25905?

CVE-2021-25905 affects Bra Project Bra. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-25905?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-25905 published?

CVE-2021-25905 was published on 2021-01-26 and last updated on 2026-06-17.

CVE-2021-25905

CVE-2021-25905 is a critical-severity vulnerability in Bra Project Bra with a CVSS 3.x base score of 9.1. 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-908.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v2: 6.4
EPSS exploit prediction: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-908
Affected product: Bra Project Bra
Published: 2021-01-26
Last modified: 2026-06-17

Description

An issue was discovered in the bra crate before 0.1.1 for Rust. It lacks soundness because it can read uninitialized memory.

Frequently asked questions

What is CVE-2021-25905?: An issue was discovered in the bra crate before 0.1.1 for Rust. It lacks soundness because it can read uninitialized memory.
How severe is CVE-2021-25905?: CVE-2021-25905 has a CVSS 3.x base score of 9.1, rated critical 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 high.
Is CVE-2021-25905 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-25905?: CVE-2021-25905 affects Bra Project Bra. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-25905?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-25905 published?: CVE-2021-25905 was published on 2021-01-26 and last updated on 2026-06-17.

References

https://rustsec.org/advisories/RUSTSEC-2021-0008.html

Affected products (1)

cpe:2.3:a:bra_project:bra:*:*:*:*:*:rust:*:*

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