Threat Intelligence / CVE / CVE-2026-2699

CVE-2026-2699 — Progress ShareFile Storage Zones Controller

CVSS v3.1 9.8 (CRITICAL) · EPSS 9.8% (higher than 92.9% of all scored CVEs) · Priority 8.6/10 · Published 2026-04-02

As of 2026-04-03, CVE-2026-2699 is a CRITICAL-severity vulnerability in Progress ShareFile Storage Zones Controller, CVSS v3.1 9.8, EPSS 9.8% (92.9th percentile). Threadlinqs Intelligence links 2 tracked threat campaigns to CVE-2026-2699, most recently “Progress ShareFile Pre-Auth RCE Chain via Authentication Bypass and Webshell Upload (CVE-2026-2699 & CVE-2026-2701)”.

Last updated: 2026-04-03

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 164 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)
9.8% probability of exploitation in the next 30 days, higher than 92.9% of all scored CVEs
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
8.6/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published
2026-04-02, last modified 2026-04-03

Is CVE-2026-2699 being exploited?

It currently carries a trending score of 28 in the Threadlinqs vulnerability feed.

Affected products and versions

How to fix CVE-2026-2699

No vendor patch reference has been recorded for CVE-2026-2699 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

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

Seeded from threat-derived and not yet processed by the Threadlinqs enrichment pipeline, so blank CVSS, EPSS or KEV fields above mean NOT MEASURED rather than measured-absent.

Full detection coverage & IOCs for threats exploiting CVE-2026-2699 are available via the Threadlinqs MCP server (Purple tier). View plans →

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