CVE-2026-20122
Last modified
CVE-2026-20122 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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 credentials with API access on the affected system. This vulnerability is due to improper file handling on the API interface of an affected system. CISA has confirmed active exploitation in the wild. EPSS estimates a 7.02% chance of exploitation in the next 30 days.
Description
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 credentials with API access on the affected system. This vulnerability is due to improper file handling on the API interface of an affected system. An attacker could exploit this vulnerability by uploading a malicious file on the local file system. A successful exploit could allow the attacker to overwrite arbitrary files on the affected system and gain vmanage user privileges.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Exploitation Status
This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Catalyst Sd-Wan Manager | < 20.9.8.2 |
| Cisco | Catalyst Sd-Wan Manager | >= 20.10, < 20.12.5.3 |
| Cisco | Catalyst Sd-Wan Manager | >= 20.13, < 20.15.4.2 |
| Cisco | Catalyst Sd-Wan Manager | >= 20.16, < 20.18.2.1 |
| Cisco | Catalyst Sd-Wan Manager | 20.12.6 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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