CVE-2026-20128Cisco Catalyst SD-WAN Manager Information Disclosure Vulnerability
Updated under an hour ago ()
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It affects Cisco Catalyst SD-WAN Manager and 1 other product. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Apr 20, 2026; federal agencies had to remediate by Apr 23, 2026. Treat that date as your deadline.
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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.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- CWE-257
- Known exploited
- Added to CISA KEV Apr 20, 2026; federal remediation due Apr 23, 2026Please adhere to CISA’s guidelines to assess exposure and mitigate risks associated with Cisco SD-WAN devices as outlines in CISA’s Emergency Directive 26-03 (URL listed below in Notes) and CISA’s “Hunt & Hardening Guidance for Cisco SD-WAN Devices (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available.
- EPSS (exploitation in the next 30 days)
- 7.22% (percentile 94)
- Assigned by
- cisco
- NVD analysis
- Analyzed
- Record last updated
- Apr 21, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Cisco Cisco Catalyst SD-WAN Manager cisco:catalyst_sd_wan_manager (from the name) | 20.1.12; 19.2.1; 18.4.4; 18.4.5; 20.1.1.1; 20.1.1; 19.3.0; 19.2.2; and 128 more ranges | CNA record |
cisco catalyst_sd-wan_manager cisco:catalyst_sd-wan_manager | before 20.9.8.2; from 20.10 before 20.12.5.3; from 20.13 before 20.15.4.2; from 20.16 before 20.18; 20.12.6 | NVD |
References
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-authbp-qwCX8D4vvendor-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20128us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.