Vulnerability in Cisco Catalyst_sd-wan_manager

CVE-2026-20122

A vulnerability in the API of Cisco Catalyst SD-WAN Manager could allow an authenticated, remote attacker to overwrite arbitrary files on the local file system. To exploit this vulnerability, the attacker must have valid read-only credenti…

EPSS: 0.070 (93.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.

Affected products

Weakness classification (CWE)

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: .

Required action: Please adhere to CISA’s guidelines to assess exposure and mitigate risks associated with Cisco SD-WAN devices as outlines in CISA’s Emergency Directive 26-03 (URL listed below in Notes) and CISA’s “Hunt & Hardening Guidance for Cisco SD-WAN Devices (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available.

References

Frequently asked questions

What is CVE-2026-20122?
CVE-2026-20122 is a medium-severity vulnerability in Cisco Catalyst_sd-wan_manager, classified under CWE-648. CVSS score: 5.4/10. Published 2026-02-25.
How severe is CVE-2026-20122?
Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2026-20122 known to be exploited?
Yes. CVE-2026-20122 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-04-20), indicating it is being actively exploited.