Is CVE-2026-34926 in the CISA KEV catalog?

Yes. CVE-2026-34926 is on the CISA Known Exploited Vulnerabilities list, added 2026-05-21.

What is the CVSS severity of CVE-2026-34926?

CVE-2026-34926 has a CVSS v3 base score of 6.7 (MEDIUM).

What is the EPSS score for CVE-2026-34926?

CVE-2026-34926 has an EPSS score of 12.68% (96th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2026-34926?

No published fix for CVE-2026-34926 has been found yet. It is on the CISA Known Exploited Vulnerabilities list; federal agencies must remediate by 2026-06-04. Apply the vendor's mitigations per CISA's guidance.

CVE & CISA-KEV Catalog

CVE-2026-34926

MEDIUMCISA KEVEPSS 96th pctl

6.7

CVSS v3

NVD

Description

A directory traversal vulnerability in the Apex One (on-premise) server could allow a pre-authenticated local attacker to modify a key table on the server to inject malicious code to deploy to agents on affected installations. This vulnerability is only exploitable on the on-premise version of Apex One and a potential attacker must have access to the Apex One Server and already obtained administrative credentials to the server via some other method to exploit this vulnerability.

CWE-23

How to fix

Actively exploited, no published fix found yet

Federal remediation due: 2026-06-04

Mitigation guidance may be in the linked vendor advisories in the References section below.

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CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityHigh

Privileges RequiredHigh

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityLow

AvailabilityLow

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:L

Exploit Intelligence

12.68%probability of exploitation in 30 days

96thpercentile

Very high risk: more likely to be exploited than 96% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Remediation due: 2026-06-04

References

Other references5

Related Vulnerabilities

Other CWE-23 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-27199	High	7.3	100%	KEV + Ransom	Fix
CVE-2020-5410	High	7.5	96%	KEV	Fix
CVE-2021-40870	Critical	9.8	93%	KEV	Fix
CVE-2025-64446	Critical	9.8	89%	KEV	Fix
CVE-2020-5405	Medium	6.5	69%	-	Fix
CVE-2025-55752	High	7.5	67%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-21.