CVE-2026-20262 Cisco Catalyst SD-WAN Manager: file path flaw
In plain words: The program can be tricked into reading or writing files outside the folder it should stay in. Leaks files such as passwords and settings, or overwrites important ones.
Confirmed exploited by CISA on · US federal patch deadline Jun 29, 2026
What to do
- Install Cisco's security update for Catalyst SD-WAN Manager. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Patch edge devices first — attackers often start scanning for them within hours of a fix.
- Never expose the device's admin page to the internet.
- After patching a device that was exposed, follow the vendor's compromise checks, end active sessions and change passwords.
Who is affected
Work IT. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.
What's at risk: They face the internet and guard the whole network, so a flaw here can hand attackers a way in — and these devices usually run no antivirus, so break-ins go unnoticed.
The details
- Official name
- Cisco Catalyst SD-WAN Manager Directory or Path Traversal Vulnerability
- Product
- Cisco Catalyst SD-WAN Manager
- CISA description
- Cisco Catalyst SD-WAN Manager contains a directory or path traversal vulnerability that could allow an authenticated, remote attacker to create a file or overwrite any file on the filesystem of an affected system.
- Type of flaw
- File path flaw (CWE-22)
- Confirmed exploited
- Jun 15, 2026
- US federal patch deadline
- Jun 29, 2026
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Answering about CVE-2026-20262 ·
Questions about CVE-2026-20262
Is CVE-2026-20262 being exploited?
Yes. CISA added CVE-2026-20262 to its Known Exploited Vulnerabilities catalog on Jun 15, 2026, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2026-20262?
Install Cisco's security update for Catalyst SD-WAN Manager. If no update exists, follow the vendor's workaround or stop using the product until one ships. Patch edge devices first — attackers often start scanning for them within hours of a fix.
Am I affected by CVE-2026-20262?
Only if you use Cisco Catalyst SD-WAN Manager. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.