# CVE-2026-4387 — StrongDM Desktop Application

> As of 2026-06-01, CVE-2026-4387 is a Low-severity (band derived from the CVSS v4.0 score, not stated by the CNA) vulnerability in StrongDM Desktop Application, CVSS v4.0 2, EPSS 0.1% (2.5th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-4387, most recently “StrongDM Desktop CVE-2026-4387 — Plaintext Session State (JWT + Asymmetric Keypair) Enables Credential-less Cross-Host Session Hijack”.

**Last updated:** 2026-06-01

## What is CVE-2026-4387?

StrongDM Desktop Application before 23.74.0 (Desktop Client before 53.77.0) on Microsoft Windows stores authentication state, including a JSON Web Token and asymmetric key material, in cleartext in a per-user state file located at C:\Users\\.sdm\state.kv. The file is protected only by default user-level NTFS permissions. Exploitation requires local read access to the affected user's profile directory and additional deployment and execution conditions on the target host. The condition was reported through coordinated disclosure by Hope Walker (SpecterOps).

The record classifies CVE-2026-4387 under weakness classes [CWE-312](https://intel.threadlinqs.com/cwe/CWE-312), [CWE-522](https://intel.threadlinqs.com/cwe/CWE-522). 2 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 134 days ago.

## Severity and exploitation probability

- **CVSS v4.0 base score:** 2 — Low (derived from score) (`CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:L/SA:L`)
- **EPSS (FIRST):** 0.1% probability of exploitation in the next 30 days, higher than 2.5% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 1.1/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-05-29, last modified 2026-06-01

## Is CVE-2026-4387 being exploited?

It currently carries a trending score of 6 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **StrongDM**: Desktop Application, Desktop Client

## How to fix CVE-2026-4387

No vendor patch reference has been recorded for CVE-2026-4387 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-2026-4387

1 tracked threat in the Threadlinqs corpus references CVE-2026-4387, either in the campaign’s CVE list or as an indicator on the campaign record.

- [StrongDM Desktop CVE-2026-4387 — Plaintext Session State (JWT + Asymmetric Keypair) Enables Credential-less Cross-Host Session Hijack](https://intel.threadlinqs.com/threat/TL-2026-0654) — HIGH · 2026-06-02

## Sources

Enriched from CVE.org, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-10-10.

**Vendor advisory and patch**

- [security.strongdm.com — vendor advisory](https://security.strongdm.com/?tcuUid=56fde839-9388-4361-8d3b-9baa7b2de2ed)

**Other references**

- [specterops.io — related](https://specterops.io/blog/2026/06/01/cve-2026-4387-strongdm-state-file-reuse/)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-4387
Full detection coverage and IOCs for threats exploiting CVE-2026-4387 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp