Vulnerability in Cisco Catalyst Sd-Wan Controller
CVE-2026-20313
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Catalyst SD-WAN engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20313 are related to Improper link resolution before file access issues that are grouped under the Common Weakness Enumeration (CWE) CWE-1284.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (36.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Cisco Catalyst Sd-Wan Controller — versions 20.6.4, 20.9.2, 20.3.6
- Cisco Catalyst Sd-Wan Manager — versions 20.1.12, 19.2.1, 18.4.4
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-20313?
- CVE-2026-20313 is a high-severity vulnerability in Cisco Catalyst Sd-Wan Controller, classified under Improper Validation of Specified Quantity in Input. CVSS score: 7.7/10. Published 2026-08-05.
- How severe is CVE-2026-20313?
- High severity. CVSS v3 base score is 7.7 out of 10.