What it is
CVE-2026-20128 is Cisco Catalyst SD-WAN Manager Information Disclosure Vulnerability. A vulnerability in the Data Collection Agent (DCA) feature of Cisco Catalyst SD-WAN Manager could allow an unauthenticated, remote...
Vulnerability report
Exploited in the wild
Confirmed confidence
In CISA KEV
CVE-2026-20128
Cisco Catalyst SD-WAN Manager Information Disclosure Vulnerability
Cisco Catalyst SD-WAN Manager · 20.1.12
- Severity
- CVSS 7.5 · High
- Confidence
- Confirmed
- Exploit status
- Exploited in the wild
- EPSS
- 7.1%
- First observed
- —
- Last observed
- —
Decision summary
What security teams need to know first
Direct answers before the deeper technical record.
Is it exploited?
Yes. Previdian tracks this CVE as a known exploited vulnerability. Confidence is confirmed. Listed in CISA KEV. Also confirmed by third-party sources.
Who is affected?
Cisco Catalyst SD-WAN Manager 20.1.12.
What should we do?
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
Overview
Cisco Catalyst SD-WAN Manager Information Disclosure Vulnerability
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.
Vendor
Product
Affected
Status
Cisco
Affected
Cisco Catalyst SD-WAN Manager
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
19.2.099
18.3.6
18.3.7
19.2.0
18.3.8
19.0.0
19.1.0
18.4.302
18.4.303
19.2.097
19.2.098
17.2.10
18.3.6.1
19.0.1a
18.2.0
18.4.3
18.4.1
17.2.8
18.3.3.1
18.4.0
18.3.1
17.2.6
17.2.9
18.3.4
17.2.5
18.3.1.1
18.3.5
18.4.0.1
18.3.3
17.2.7
18.3.0
19.2.3
18.4.501_ES
20.3.1
20.1.2
19.2.929
19.2.31
20.3.2
19.2.32
20.3.2.1
20.3.2.1_927
18.4.6
20.3.2_928
20.3.2_929
20.4.1.0.1
20.3.2.1_930
19.2.4
20.5.0.1.1
20.4.1.1
20.3.3
19.2.4.0.1
20.3.2_937
20.5.1
20.1.3
20.3.3.0.4
20.3.3.1.2
20.3.3.1.1
20.4.1.2
20.3.3.0.2
20.4.1.1.5
20.4.1.0.02
20.3.3.1.7
20.3.3.1.5
20.5.1.0.1
20.3.3.1.10
20.3.3.0.8
20.4.2
20.3.4
20.3.3.0.14
19.2.4.0.8
19.2.4.0.9
20.3.4.0.1
20.3.2.0.5
20.5.1.0.2
20.6.1.1
20.6.0.18.3
20.3.2.0.6
20.6.0.18.4
20.4.2.0.2
20.3.3.0.16
20.6.1.0.1
20.3.4.0.6
20.7.1EFT2
20.3.4.0.9
20.3.4.0.11
20.3.3.0.18
20.6.2.1
20.3.4.1
20.4.2.1
20.4.2.1.1
20.3.4.1.1
20.3.813
20.3.4.0.19
20.4.2.2.1
20.5.1.2
20.3.814
20.4.2.2
20.6.2.2
20.3.4.2.1
20.3.4.1.2
20.3.4.0.20
20.6.2.2.3
20.4.2.2.2
20.6.2.0.4
20.3.4.0.24
20.6.2.2.7
20.3.4.2.2
20.4.2.2.4
20.3.5.0.8
20.3.5.0.9
20.3.5.0.7
20.6.3.0.2
20.9.1EFT2
20.3.6
20.3.7
20.4.2.3
20.3.5.1
20.3.4.3
20.3.3.2
20.3.7.1
20.3.4.0.25
20.6.2.2.4
20.6.1.2
20.1.3.1
20.6.5.1.4
20.3.8
20.12.501
26.1.1
Affected
- Published
- 25 Feb 2026
- Exploitation Reported
- 01 Jun 2026
- Attack vector
- Local
- Complexity
- High
- Privileges
- High
- User interaction
- None
Tags
cisa
edge
CVE References
- CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2026-20128
- cisco-sa-sdwan-authbp-qwCX8D4v sec.cloudapps.cisco.com · CVE Record https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurity...
Exploitation evidence
Why Previdian marks this CVE as exploited
Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.
Exploited in the wild
CVE
A trusted third party reported exploitation.
Known exploited vulnerability sources
Per-source evidence links for KEV attestations are available through the Previdian Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CVE First | 2026-06-01 13:22 UTC |
| CISA | 2026-06-02 14:01 UTC |
| The Shadowserver | 2026-08-04 00:00 UTC |
Detection
Operational artifacts and observed signals
Make the evidence actionable in scanner, SOC, and edge-control workflows.
Observed signals
- Request targets
- User-Agents
- Callback hosts
- 0
- 0
- 0
Request targets and User-Agents available in Pro. Callback host details available in Enterprise.
Scanner coverage
No scanner integrations recorded yet.
Virtual patch status
No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.
Learn about virtual patches →No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Risk and context
Severity, weaknesses, and research context
CVSS v3.1
7.5
High
Potential damage if exploited. Separate from whether attackers are using it.
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
EPSS
7.1%
Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.
Timeline
From disclosure to observed exploitation
-
00:00 UTC
KEV confirmed by The Shadowserver
Exploitation attested by an external source
-
14:01 UTC
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
13:22 UTC
Added to Previdian KEV Feed
High-confidence, third-party attested exploitation
-
16:14 UTC
CVE published
Vulnerability disclosed publicly
-
11:59 UTC
CVE ID reserved
Identifier reserved by the CNA
Pro API
Automate this intelligence
Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
- Evidence confidence and provenance
- First-party sensor telemetry
- PoC and scanner references
- Affected versions and enrichment
- Automation-ready JSON delivery
GET /api/v2/pro/kevs/CVE-2026-20128
Free JSON includes basic KEV fields{
"cve_id": "CVE-2026-20128",
"confidence": "Confirmed",
"cvss_score": 7.5,
"cvss_estimated": false,
"epss_score": 0.07064,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "attempts": 0, "sensors": 0 }
}