CVE-2026-20262: Cisco Catalyst SD-WAN Manager Directory or Path Traversal Vulnerability

Patch now

MEDIUM 6.5EXPLOITEDUPGRADE

CVE-2026-20262 is a medium-severity flaw (CVSS 6.5) affecting catalyst sd-wan manager, reported as exploited in the wild. 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 authenticated, remote attacker to create a file or overwrite any file on the filesystem of an affected system. This vulnerability exists because the affected software does not properly validate user-supplied input during a file upload process. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected API e

Why this priority

EPSS top 2%: very likely to be exploited
Exploited in the wild (CISA KEV)

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	29.1% (top 2%)
CISA exploited list	Yes, fix due 2026-06-29
Weakness	CWE-22
Published	2026-06-15
Last modified	2026-07-24

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

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-15Exploited Added to the CISA Known Exploited Vulnerabilities list
2026-06-15 18:16 UTCPublished CVE record published
2026-06-29Deadline CISA due date for US federal agencies to patch
2026-07-24 19:10 UTCUpdated Record last modified

cisco catalyst sd-wan manager UPGRADE

Affected: < 20.9.9.2 · >= 20.10 and < 20.12.7.2 · >= 20.13 and < 20.15.4.5 · >= 20.15.5 and < 20.15.5.3 · >= 20.16 and < 20.18.3.1 · >= 26.1 and < 26.1.1.2

Fixed in: 20.9.9.2, 20.12.7.2, 20.15.4.5, 20.15.5.3, 20.18.3.1, 26.1.1.2

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 20.9.9.2 (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.

Exact fixes by distribution

Fedora 46 · ruff · FIXED · 0.17.3-1.fc46 · FEDORA-2026-63898fdcbb · source

sudo dnf upgrade --advisory=FEDORA-2026-63898fdcbb

Fedora ELN · xorg-x11-server-Xwayland · FIXED · 26.0.99.903-2.eln159 · FEDORA-2026-4581dab0ed · source

sudo dnf upgrade --advisory=FEDORA-2026-4581dab0ed

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: fevar54/CVE-2026-20262-Cisco-Catalyst-SD-WAN-Manager-Arbitrary-File-Write- (1 stars)
GitHub PoC: HORKimhab/CVE-2026-20262 (0 stars)

Verify at the official source NVD · CVE Program · CISA KEV catalog · 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-2026-20262?

catalyst sd-wan manager: upgrade to 20.9.9.2, 20.12.7.2, 20.15.4.5, 20.15.5.3, 20.18.3.1, 26.1.1.2. Exact commands for each OS are on this page.

Is CVE-2026-20262 being exploited?

Yes. CVE-2026-20262 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.

What does CVE-2026-20262 affect?

CVE-2026-20262 affects catalyst sd-wan manager. Severity is medium (CVSS 6.5). A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an authenticated, remote attacker to create a file or overwrite any file on the filesystem of an affected system. This vulnerability exi

How urgent is CVE-2026-20262?

Priority 72/100. EPSS top 2%: very likely to be exploited; Exploited in the wild (CISA KEV)

Software pages

Cisco vulnerabilities

Related CVEs

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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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