How severe is CVE-2023-34340?

CVE-2023-34340 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-2023-34340 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-34340?

CVE-2023-34340 affects Apache Accumulo. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-34340?

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-2023-34340 published?

CVE-2023-34340 was published on 2023-06-21 and last updated on 2026-06-17.

CVE-2023-34340

CVE-2023-34340 is a critical-severity vulnerability in Apache Accumulo 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-287.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Apache Accumulo
Published: 2023-06-21
Last modified: 2026-06-17

Description

Improper Authentication vulnerability in Apache Software Foundation Apache Accumulo. This issue affects Apache Accumulo: 2.1.0. Accumulo 2.1.0 contains a defect in the user authentication process that may succeed when invalid credentials are provided. Users are advised to upgrade to 2.1.1.

Frequently asked questions

What is CVE-2023-34340?: Improper Authentication vulnerability in Apache Software Foundation Apache Accumulo. This issue affects Apache Accumulo: 2.1.0. Accumulo 2.1.0 contains a defect in the user authentication process that may succeed when invalid credentials are provided. Users are advised to upgrade to 2.1.1.
How severe is CVE-2023-34340?: CVE-2023-34340 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-2023-34340 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-34340?: CVE-2023-34340 affects Apache Accumulo. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-34340?: 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-2023-34340 published?: CVE-2023-34340 was published on 2023-06-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:accumulo:2.1.0:*:*:*:*:*:*:*

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