How severe is CVE-2021-43310?

CVE-2021-43310 has a CVSS 3.x base score of 9.8, 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 high, and availability high.

Is CVE-2021-43310 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43310?

CVE-2021-43310 affects Keylime. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-43310?

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-2021-43310 published?

CVE-2021-43310 was published on 2022-09-21 and last updated on 2026-06-17.

CVE-2021-43310

CVE-2021-43310 is a critical-severity vulnerability in Keylime with a CVSS 3.x base score of 9.8. 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-290.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-290
Affected product: Keylime
Published: 2022-09-21
Last modified: 2026-06-17

Description

A vulnerability in Keylime before 6.3.0 allows an attacker to craft a request to the agent that resets the U and V keys as if the agent were being re-added to a verifier. This could lead to a remote code execution.

Frequently asked questions

What is CVE-2021-43310?: A vulnerability in Keylime before 6.3.0 allows an attacker to craft a request to the agent that resets the U and V keys as if the agent were being re-added to a verifier. This could lead to a remote code execution.
How severe is CVE-2021-43310?: CVE-2021-43310 has a CVSS 3.x base score of 9.8, 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 high, and availability high.
Is CVE-2021-43310 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43310?: CVE-2021-43310 affects Keylime. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-43310?: 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-2021-43310 published?: CVE-2021-43310 was published on 2022-09-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:keylime:keylime:*:*:*:*:*:*:*:*

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