CVE-2026-20209
MEDIUMDescription
A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an authenticated, remote attacker with read-only permissions to elevate their privileges from low to high and perform actions as a high-privileged user. This vulnerability exists because sensitive session information is recorded in audit logs. An attacker could exploit this vulnerability by elevating their read-only permissions in Cisco Catalyst SD-WAN Manager to those of a high-privileged user. A successful exploit could allow the attacker to perform actions as a high-privileged user.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Exploit Intelligence
Low risk: more likely to be exploited than 9% of all known CVEs.
References
Related Vulnerabilities
Other CWE-779 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2024-36416 | High | 8.6 | 2.0% | - | Fix |
| CVE-2024-36072 | Critical | 9.8 | 1.0% | - | - |
| CVE-2022-31004 | High | 7.5 | 0.9% | - | - |
| CVE-2025-51397 | Medium | 5.4 | 0.9% | - | - |
| CVE-2024-55628 | High | 7.5 | 0.7% | - | Fix |
| CVE-2023-23949 | Medium | 5.4 | 0.6% | - | - |
Common questions
How do I fix CVE-2026-20209?
Upgrade catalyst sd-wan manager to 26.1.1.1 or later.
Is CVE-2026-20209 being actively exploited?
Not that we know of. CVE-2026-20209 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.19% is the estimated probability that it will be exploited in the next 30 days. That is higher than 9% of all scored CVEs.
How severe is CVE-2026-20209?
CVE-2026-20209 has a CVSS v3 base score of 5.4, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2026-20209 affect?
Published advisories record a fix for catalyst sd-wan manager (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
Embed a live status badge for CVE-2026-20209
Markdown
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-29.