CVE-2026-20128
Confirmed PUBLISHEDCisco Catalyst SD-WAN Manager Information Disclosure Vulnerability
1 day faster than CISA KEV
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
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.
- CVE Published
- Feb 25, 2026
- Exploitation Reported
- Jun 01, 2026
- CVSS
- 7.5 High
- EPSS
- 5.3%
Affected Versions
136 version rows · page 4 of 6
| Vendor | Product | Version | Status |
|---|---|---|---|
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.3.4 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.3.3.0.14 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
19.2.4.0.8 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
19.2.4.0.9 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.3.4.0.1 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.3.2.0.5 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.5.1.0.2 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.6.1.1 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.6.0.18.3 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.3.2.0.6 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.6.0.18.4 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.4.2.0.2 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.3.3.0.16 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.6.1.0.1 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.3.4.0.6 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.7.1EFT2 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.3.4.0.9 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.3.4.0.11 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.3.3.0.18 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.6.2.1 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.3.4.1 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.4.2.1 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.4.2.1.1 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.3.4.1.1 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.3.813 |
Affected |
CVE References
- cisco-sa-sdwan-authbp-qwCX8D4v sec.cloudapps.cisco.com · CVE Record https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurity...
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CVE First | 2026-06-01 13:22 UTC |
| CISA | 2026-06-02 14:01 UTC |
No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Exploitation Status
Exploited in the wild
Recorded 2026-06-01 13:22:22 UTC · CVE
Weaknesses (CWE)
-
Storing Passwords in a Recoverable Format
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
14:01 UTC about 2 months ago14:01 UTC · about 2 months ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
13:22 UTC about 2 months ago13:22 UTC · about 2 months ago
Added to KEVIntel KEV Feed
High-confidence, third-party attested exploitation
-
16:14 UTC 5 months ago16:14 UTC · 5 months ago
CVE published
Vulnerability disclosed publicly
-
11:59 UTC 9 months ago11:59 UTC · 9 months ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2026-20128
{
"cve_id": "CVE-2026-20128",
"title": "Cisco Catalyst SD-WAN Manager Information Disclosure Vulnerability",
"affected_vendor": "Cisco",
"affected_product": "Cisco Catalyst SD-WAN Manager",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 7.5,
"epss_score": 0.05269,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}