How severe is CVE-2021-43414?

CVE-2021-43414 has a CVSS 3.x base score of 7.0, rated high severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-43414 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43414?

CVE-2021-43414 affects Gnu Hurd. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-43414?

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-2021-43414 published?

CVE-2021-43414 was published on 2021-11-07 and last updated on 2026-06-17.

CVE-2021-43414

CVE-2021-43414 is a high-severity vulnerability in Gnu Hurd with a CVSS 3.x base score of 7.0. 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-287.

Key facts

Severity: High (CVSS 3.x base score 7.0)
CVSS v2: 6.9
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Gnu Hurd
Published: 2021-11-07
Last modified: 2026-06-17

Description

An issue was discovered in GNU Hurd before 0.9 20210404-9. The use of an authentication protocol in the proc server is vulnerable to man-in-the-middle attacks, which can be exploited for local privilege escalation to get full root access.

Frequently asked questions

What is CVE-2021-43414?: An issue was discovered in GNU Hurd before 0.9 20210404-9. The use of an authentication protocol in the proc server is vulnerable to man-in-the-middle attacks, which can be exploited for local privilege escalation to get full root access.
How severe is CVE-2021-43414?: CVE-2021-43414 has a CVSS 3.x base score of 7.0, rated high severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-43414 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43414?: CVE-2021-43414 affects Gnu Hurd. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-43414?: 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-2021-43414 published?: CVE-2021-43414 was published on 2021-11-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:gnu:hurd:*:*:*:*:*:*:*:*

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