Cisco Catalyst Center Arbitrary File Read Vulnerability
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. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-catc-file-read-wLH2vf8X Security Impact Rating: High CVE: CVE-2026-20191
CSIRTS triage
- What
- A vulnerability in Cisco Catalyst Center could allow an attacker to read arbitrary files.
- Who is affected
- Unauthenticated remote attackers targeting affected Cisco devices.
- Urgency
- Remediation is urgent due to the high security impact rating.
- Action
- Users should update to the latest software version to address this vulnerability.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-201910.76% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 51% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-20191 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- medium[UPDATE] [medium] Cisco Catalyst Center: Vulnerability Allows Information Disclosurecert-bund
- unknownNCSC-2026-0218 [1.00] [M/H] Vulnerability fixed in Cisco Catalyst Centerncsc-nl
- unknownMultiple vulnerabilities in Cisco products (July 2, 2026)cert-fr-avis
- highCVE-2026-20191: A vulnerability in Cisco Catalyst Center could allow an unauthenticated, remote attacker to re…nvd
- highCisco Advance Notification for Publication of July 1, 2026, Security Advisoriescisco-psirt
Recent advisories for Cisco Catalyst Center
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- medium[UPDATE] [medium] Cisco Catalyst Center: Vulnerability Allows Information Disclosurecert-bund · 2026-07-03
- unknownNCSC-2026-0218 [1.00] [M/H] Vulnerability fixed in Cisco Catalyst Centerncsc-nl · 2026-07-02
- highCVE-2026-20191: A vulnerability in Cisco Catalyst Center could allow an unauthenticated, remote attacker to re…nvd · 2026-07-01
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