CVE-2026-20342CWE-639

CVE-2026-20342

High · published September 17, 2026

CVSS v3.1
7.7
EPSS
1%
Percentile
45.3
In the wild
Unconfirmed
What it is

A vulnerability in a specific file download API of Cisco Secure FMC Software could allow an authenticated, remote attacker to download arbitrary files from an affected system.

This vulnerability exists because user input is not being sanitized. An attacker could exploit this vulnerability by sending a crafted HTTPS request. A successful exploit could allow the attacker to download arbitrary files from the affected system.

To exploit this vulnerability, the attacker must have valid credentials for a user account with at least the role of Security Analyst (read-only).

The record
Technical detail
CVSS v3.1
7.7 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00550 · 45.3th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-09-17T01:17Z
References (1)
EPSS history
Timeline
  • 18 SEP 03:58Z
    EPSS moved — → 1%
    epss
  • 16 SEP 20:15Z
    Cisco Secure Firewall Management Center Software Low Privileged Arbitrary File Download Vulnerability
    cvelistv5