No exploitation reportedFix available

CVE-2023-34340

Q: Is CVE-2023-34340 actively exploited?

Active exploitation of CVE-2023-34340 has not been confirmed. Its EPSS score was 1.4% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2023-34340?

CVE-2023-34340 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2023-06-21
Fixed in2.1.1
WeaknessCWE-287

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2023-06-2108:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-34340?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-34340?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

CISA-ADP · OSV · NVD

Apache accumulo

Branch	Affected	Fixed in	Source
2.1	≥ 2.1.0, < 2.1.1	2.1.1	CISA-ADP · OSV
2.1	= 2.1.0	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Apache accumulo to 2.1.1

Advisories and patches

accumulo.apache.orgRelease Notes
lists.apache.orgVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2024-10-09
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.19.82024-10-09
NVDCVSS 3.19.8read 2026-10-23
CNAweakness (CWE)CWE-287read 2026-10-23
FIRST EPSSEPSS score1.4 %2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2023-06-21
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2023-34340?

Is CVE-2023-34340 actively exploited?

Active exploitation of CVE-2023-34340 has not been confirmed. Its EPSS score was 1.4% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-34340?

CVE-2023-34340 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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