# CVE-2026-20191 — Cisco Catalyst Center

> As of 2026-07-01, CVE-2026-20191 is a HIGH-severity vulnerability in Cisco Catalyst Center, CVSS v3.1 7.5, EPSS 0.7% (50.5th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-20191, most recently “Cisco Catalyst Center Unauthenticated Path Traversal / Arbitrary File Read Vulnerability (CVE-2026-20191)”.

**Last updated:** 2026-07-01

## What is CVE-2026-20191?

A vulnerability in Cisco Catalyst Center could allow an unauthenticated, remote attacker to read arbitrary files from a restricted container. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device. A successful exploit could allow the attacker to read arbitrary files from a restricted container of the affected device.

The record classifies CVE-2026-20191 under weakness class [CWE-22](https://cwe.mitre.org/data/definitions/22.html). 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. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 74 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 7.5 — HIGH (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **EPSS (FIRST):** 0.7% probability of exploitation in the next 30 days, higher than 50.5% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 5.8/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-07-01

## Is CVE-2026-20191 being exploited?

No public exploitation evidence for CVE-2026-20191 is recorded in the sources Threadlinqs tracks — CISA KEV, Exploit-DB, public proof-of-concept repositories and ProjectDiscovery Nuclei — as of 2026-07-01. That is an absence of evidence in those feeds, not a guarantee that the vulnerability is unexploited.

## Affected products and versions

- **Cisco**: Catalyst Center

## How to fix CVE-2026-20191

No vendor patch reference has been recorded for CVE-2026-20191 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-2026-20191

1 tracked threat in the Threadlinqs corpus references CVE-2026-20191, either in the campaign’s CVE list or as an indicator on the campaign record.

- [Cisco Catalyst Center Unauthenticated Path Traversal / Arbitrary File Read Vulnerability (CVE-2026-20191)](https://intel.threadlinqs.com/threat/TL-2026-1071) — HIGH · 2026-07-02

## Sources

Enriched from CVE.org, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-07-02.

**Other references**

- [sec.cloudapps.cisco.com](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-catc-file-read-wLH2vf8X)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-20191
Full detection coverage and IOCs for threats exploiting CVE-2026-20191 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp