What is CVE-2026-2699?
Authentication bypass in Progress ShareFile Storage Zones Controller (SZC) 5.x caused by an Execution After Redirect (EAR) flaw in /ConfigService/Admin.aspx. The application uses Response.Redirect(path, false) allowing attackers to intercept and strip the Location header to access the full admin interface without credentials, enabling modification of Storage Zone configuration including network share paths and zone passphrases.
The record classifies CVE-2026-2699 under weakness classes CWE-284, CWE-698. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 219 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 9.8 — CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS (FIRST)
- 3.1% probability of exploitation in the next 30 days, higher than 87.6% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 10/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2026-04-02, last modified 2026-04-08
Is CVE-2026-2699 being exploited?
Weaponised exploit code for CVE-2026-2699 is publicly available. 2 public proof-of-concept repositories are tracked for this identifier. A ProjectDiscovery Nuclei detection template exists (http/cves/2026/CVE-2026-2699.yaml). It currently carries a trending score of 37 in the Threadlinqs vulnerability feed.
Affected products and versions
- Progress: ShareFile Storage Zones Controller
How to fix CVE-2026-2699
Vendor advisory: https://docs.sharefile.com/en-us/storage-zones-controller/5-0/security-vulnerability-feb26. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.
Threat activity tracking CVE-2026-2699
2 tracked threats in the Threadlinqs corpus reference CVE-2026-2699, either in the campaign’s CVE list or as an indicator on the campaign record.
Sources
Enriched from CVE.org, FIRST EPSS, GitHub Security Advisories, public proof-of-concept repositories, ProjectDiscovery Nuclei. Last verified by Threadlinqs on .