CVE-2026-20224: A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an unauth

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HIGH 8.6REMOTEUPGRADE

CVE-2026-20224 is a high-severity flaw (CVSS 8.6) affecting catalyst sd-wan manager. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an unauthenticated, remote attacker to read arbitrary files that are stored in an affected system. The attacker does not need to have valid user credentials. This vulnerability is due to improper handling of XML External Entity (XXE) entries when parsing an XML file. An attacker could exploit this vulnerability by sending a crafted request to a

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.6 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 35%)
CISA exploited list	No
Weakness	CWE-20
Published	2026-05-14
Last modified	2026-10-26

Publisher (CNA): Cisco Systems, Inc. · Vendor: cisco

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-14 17:16 UTCPublished CVE record published
2026-10-26 14:10 UTCUpdated Record last modified

cisco catalyst sd-wan manager UPGRADE

Affected: < 20.9.9.1 · >= 20.10 and < 20.12.5.4 · >= 20.12.6 and < 20.12.6.2 · >= 20.13 and < 20.15.4.4 · >= 20.15.5 and < 20.15.5.2 · >= 20.16 and < 20.18.2.2 · >= 26.1 and < 26.1.1.1 · 20.12.7

Fixed in: 20.9.9.1, 20.12.5.4, 20.12.6.2, 20.15.4.4, 20.15.5.2, 20.18.2.2, 26.1.1.1

Safe to downgrade to: a release before 20.10

1. Check installed version

apt-cache policy catalyst-sd-wan-manager || rpm -q catalyst-sd-wan-manager || catalyst-sd-wan-manager --version

2. UPGRADE to 20.9.9.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade catalyst-sd-wan-manager

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade catalyst-sd-wan-manager

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 20.10 (Debian / Ubuntu)

apt-cache madison catalyst-sd-wan-manager sudo apt install catalyst-sd-wan-manager=<VERSION_BEFORE_20.10> sudo apt-mark hold catalyst-sd-wan-manager

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list catalyst-sd-wan-manager sudo dnf downgrade catalyst-sd-wan-manager-<VERSION_BEFORE_20.10> sudo dnf versionlock add catalyst-sd-wan-manager

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-20224?

catalyst sd-wan manager: upgrade to 20.9.9.1, 20.12.5.4, 20.12.6.2, 20.15.4.4, 20.15.5.2, 20.18.2.2, 26.1.1.1. Exact commands for each OS are on this page.

Is CVE-2026-20224 being exploited?

CVE-2026-20224 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-20224 affect?

CVE-2026-20224 affects catalyst sd-wan manager. Severity is high (CVSS 8.6). A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an unauthenticated, remote attacker to read arbitrary files that are stored in an affected system. The attacker does not need to have valid

How urgent is CVE-2026-20224?

Priority 51/100. High severity; Remotely exploitable, no login, no user action

Software pages

Cisco vulnerabilities

Related CVEs

CVE-2026-20182 CRITICAL 10.0 EXPLOITED UPGRADE UPGRADE Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability
CVE-2026-20209 MEDIUM 5.4 UPGRADE A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an authen
CVE-2026-20210 MEDIUM 5.4 UPGRADE A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an authen
CVE-2026-76504 CRITICAL 9.8 EXPLOITED UPGRADE Cisco Catalyst SD-WAN Manager Hex Encoding Vulnerability

References

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