CVE-2026-20128
Last modified
CVE-2026-20128 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A vulnerability in the Data Collection Agent (DCA) feature of Cisco Catalyst SD-WAN Manager could allow an unauthenticated, remote attacker to gain DCA user privileges on an affected system. This vulnerability is due to the presence of a credential file for the DCA user on an affected system. An attacker could exploit this vulnerability by sending a crafted HTTP request and reading the file that contains the DCA password from that affected system. CISA has confirmed active exploitation in the wild. EPSS estimates a 5.27% chance of exploitation in the next 30 days.
Description
A vulnerability in the Data Collection Agent (DCA) feature of Cisco Catalyst SD-WAN Manager could allow an unauthenticated, remote attacker to gain DCA user privileges on an affected system. This vulnerability is due to the presence of a credential file for the DCA user on an affected system. An attacker could exploit this vulnerability by sending a crafted HTTP request and reading the file that contains the DCA password from that affected system. A successful exploit could allow the attacker to access another affected system and gain DCA user privileges. Note: Cisco Catalyst SD-WAN Manager releases 20.18 and later are not affected by this vulnerability.
Metrics
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 |
| Cisco | Catalyst Sd-Wan Manager | 20.12.6 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
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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.
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