CVE-2026-20128

74

FAUCET Score

CVE-2026-20128 is a high-severity vulnerability (CVSS 7.5) in the Data Collection Agent (DCA) feature of Cisco Catalyst SD-WAN Manager, affecting versions prior to 20.18. An authenticated, local attacker with vmanage credentials can exploit a credential file containing the DCA password to gain DCA user privileges on an affected system. This requires high privileges (PR:H) and high attack complexity (AC:H) but can lead to full compromise of confidentiality, integrity, and availability (C:H, I:H, A:H). While there is no public exploit code (Metasploit, Nuclei, ExploitDB) or KEV entry, the vulnerability has garnered significant community discussion (6 mentions) and media coverage (3 articles), with some reports indicating ongoing exploitation of similar Cisco SD-WAN flaws.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		< 20.9.8.2CPE matchmatch criteria	cpe:2.3:a:cisco:catalyst_sd-wan_manager::::::::
		>= 20.10, < 20.12.5.3CPE matchmatch criteria	cpe:2.3:a:cisco:catalyst_sd-wan_manager::::::::
		>= 20.13, < 20.15.4.2CPE matchmatch criteria	cpe:2.3:a:cisco:catalyst_sd-wan_manager::::::::
		>= 20.16, < 20.18CPE matchmatch criteria	cpe:2.3:a:cisco:catalyst_sd-wan_manager::::::::
		20.12.6CPE matchmatch criteria	cpe:2.3:a:cisco:catalyst_sd-wan_manager:20.12.6:::::::*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

Exploitability Score

0.8

Impact Score

6.0

CvssVersion

3.1

Exploit Intelligence

EPSS Score

6.94%

Probability of exploitation in next 30 days

EPSS Percentile

93.4%

Percentile rank of EPSS score among Peer Group

As of 2026-07-25

Model: v2026.06.15

Added to KEV · Apr 20, 2026

This CVE's current EPSS score of 0.0694 is in the 100th percentile among its peer group of 160 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (10)

gcppatch availablevia llm_extracted

Fixed in: 1.2

opensipspatch availablevia llm_extracted

Fixed in: 1.2

3cxvendor investigatingvia llm_extracted

amazonvendor investigatingvia llm_extracted

ciscovendor investigatingvia nvd_reference

horillavendor investigatingvia llm_extracted

inveniosoftwarevendor investigatingvia llm_extracted

jitsivendor investigatingvia llm_extracted

leantimevendor investigatingvia llm_extracted

nutanixvendor investigatingvia llm_extracted

Vendor Advisories (9)

opensipsllm-opensips-bf4778697c828122CRITICAL

Cisco Catalyst SD-WAN Vulnerabilities

amazonllm-amazon-657d142c78b9ccf3HIGH

Cisco Catalyst SD-WAN Manager Privilege Escalation (CVE-2026-20128)

nutanixllm-nutanix-a702eff048f1f534HIGH

Cisco Catalyst SD-WAN Manager Privilege Escalation (CVE-2026-20128)

horillallm-horilla-5dde7b2b05946a26HIGH

Cisco Catalyst SD-WAN Manager Privilege Escalation (CVE-2026-20128)

inveniosoftwarellm-inveniosoftware-640d61d99540b99bHIGH

Cisco Catalyst SD-WAN Manager Privilege Escalation (CVE-2026-20128)

jitsillm-jitsi-d4c116d68c048894HIGH

Cisco Catalyst SD-WAN Manager Privilege Escalation (CVE-2026-20128)

leantimellm-leantime-3661326ebd1c00d6HIGH

Cisco Catalyst SD-WAN Manager Privilege Escalation (CVE-2026-20128)

3cxllm-3cx-8e6e8758107efa0cHIGH

Cisco Catalyst SD-WAN Manager Privilege Escalation (CVE-2026-20128)

gcpllm-gcp-582ab54c9a587fb8CRITICAL

Cisco Catalyst SD-WAN Vulnerabilities

References

cisa.gov / known-exploited-vulnerabilities-catalog

US Government Resource

sec.cloudapps.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-authbp-qwCX8D4v

Vendor Advisory