What is CVE-2025-55526?

CVE-2025-55526 is a critical-severity vulnerability in Microsoft Windows 11, classified under Path Traversal. CVSS score: 9.1/10. Published 2025-08-26.

How severe is CVE-2025-55526?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Is CVE-2025-55526 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Path Traversal in Microsoft Windows 11

CVE-2025-55526

n8n-workflows Main Commit ee25413 allows attackers to execute a directory traversal via the download_workflow function within api_server.py

Vulnerability class: Path Traversal (Directory Traversal)

Published 2025-08-26 · last modified 2026-08-20.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.008 (55.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 55.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Microsoft Windows 11
N8n Fastapi — versions 0.115.14
N8n Pydantic — versions 2.11.7
N8n Uvicorn — versions 0.35.0
Zie619 N8n Workflow Collection — versions 2025-06-29

Weakness classification (CWE)

CWE-22 — Path Traversal

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

github.com/Zie619/n8n-workflows/issues/48 (Exploit, Issue Tracking)

Frequently asked questions

What is CVE-2025-55526?: CVE-2025-55526 is a critical-severity vulnerability in Microsoft Windows 11, classified under Path Traversal. CVSS score: 9.1/10. Published 2025-08-26.
How severe is CVE-2025-55526?: Critical severity. CVSS v3 base score is 9.1 out of 10.
Is CVE-2025-55526 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.