Called exploited 2 days before disclosure.
Measured from the CVE publication date to the earliest of 3 KEV catalogues that list it.
The life of this vulnerability
- CVE reserved
- CVE published8d
- First KEV listing2d
- Last KEV listing1d
- Last sightingsame day
Gaps are compressed to equal steps. The elapsed time is printed under each.
Which catalogues call it exploited
- CISA KEVUS federallisted Sep 16, 2026
- EUVDENISA, European Unionlisted Sep 16, 2026
- VulnCheck KEVcommercial researchlisted Sep 15, 2026
- CIRCLaggregator, mirrors the abovelisted Sep 15, 2026, not counted
3 catalogues list it. CIRCL aggregates the others and is shown but not counted.
Public exploitation evidence
- reported exploitationwww.cisa.gov/sites/default/files/feeds/known_exploited_vulne
- reported exploitationsecurity-advisory.acronis.com/updates/UPD-2609-3d72-20a7
2 public reports collected from VulnCheck and CIRCL, first on Sep 15, 2026. Each links to its original source. We have not verified them.
Description
Acronis Backup plugin for cPanel & WHM and extension for Plesk contains an incorrect default permissions vulnerability that could allow for privilege escalation.
Required action (CISA)
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
