CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:L
Called exploited the same day it was disclosed.
Measured from the CVE publication date to the earliest of 3 KEV catalogues that list it.
The life of this vulnerability
- CVE published
- First KEV listingsame day
- Last sightingsame day
Gaps are compressed to equal steps. The elapsed time is printed under each.
Which catalogues call it exploited
- CISA KEVUS federallisted May 21, 2026
- EUVDENISA, European Unionlisted May 21, 2026
- VulnCheck KEVcommercial researchlisted May 21, 2026
- CIRCLaggregator, mirrors the abovelisted May 21, 2026, not counted
3 catalogues list it. CIRCL aggregates the others and is shown but not counted.
Public exploitation evidence
- reported exploitationjvn.jp/en/vu/JVNVU90583059/
- reported exploitationsuccess.trendmicro.com/en-US/solution/KA-0023430
- reported exploitationwww.cisa.gov/sites/default/files/feeds/known_exploited_vulne
3 public reports collected from VulnCheck and CIRCL, first on May 21, 2026. Each links to its original source. We have not verified them.
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.
Required action (CISA)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.