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CVE-2026-20128

Cisco Catalyst SD-WAN Manager Information Disclosure Vulnerability

CVSS 3.1 High 7.5Known exploited (CISA KEV)

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

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.

Official description from the CVE record, published by cisco. Copyright © 1999-2026 The MITRE Corporation. See /security/cve/legal for the CVE license. View the record on cve.org

Key data

CVSS 3.1 High 7.5

Score published by cisco in the CVE record.

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

  • Attack vector: Local

    The attacker needs local access to the system, or to trick a user into running something.

  • Attack complexity: High

    The attack depends on conditions outside the attacker's control, so it takes preparation.

  • Privileges required: High

    An account with significant privileges, such as an administrator, is needed.

  • User interaction: None

    No action from any user is needed.

  • Scope: Changed

    The impact can reach other components beyond the vulnerable one.

  • Confidentiality impact: High

    Serious or total effect on the secrecy of data.

  • Integrity impact: High

    Serious or total effect on the trustworthiness of data.

  • Availability impact: High

    Serious or total effect on availability.

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at first.org/cvss.

EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.
Score
0.08349 (8.3% probability)
Percentile
95.0%
Scores of
Nov 10, 2026
Model
v2026.06.15

CISA Known Exploited Vulnerabilities

This CVE is listed in the CISA KEV catalog.
Name in the catalog
Cisco Catalyst SD-WAN Manager Storing Passwords in a Recoverable Format Vulnerability
Added to the catalog
Apr 20, 2026
Federal due date
Apr 23, 2026

CISA assessment as of Feb 25, 2026

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.
Exploitation
Recorded by CISA as active
Automatable
no
Technical impact
total

Weakness (CWE)

CWE catalog version 5.0.
CWE names: Copyright © 2006-2026, The MITRE Corporation. See /security/cve/legal for the CWE license.
  • CWE-257Storing Passwords in a Recoverable Format

Affected products

Products listed in the CVE record, as the CNA published them.

  • Cisco Catalyst SD-WAN Manager

    • affected: 20.1.12
    • affected: 19.2.1
    • affected: 18.4.4
    • affected: 18.4.5
    • affected: 20.1.1.1
    • affected: 20.1.1
    • affected: 19.3.0
    • affected: 19.2.2
    • affected: 19.2.099
    • affected: 18.3.6
    • affected: 18.3.7
    • affected: 19.2.0
    • affected: 18.3.8
    • affected: 19.0.0
    • affected: 19.1.0
    • affected: 18.4.302
    • affected: 18.4.303
    • affected: 19.2.097
    • affected: 19.2.098
    • affected: 17.2.10
    • affected: 18.3.6.1
    • affected: 19.0.1a
    • affected: 18.2.0
    • affected: 18.4.3
    • affected: 18.4.1
    • and 111 more

References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

Timeline

  1. ID reserved
  2. Record published
  3. Added to CISA KEV
  4. Record last updated

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About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.
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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:11 UTC. Sources and licenses