As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Catalyst SD-WAN engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities.

The vulnerabilities tracked by CVE-2026-20310 are related to improper link resolution before file access issues that are grouped under the Common Weakness Enumeration (CWE) CWE-59.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required High

Scope Changed

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Cisco Cisco Catalyst SD-WAN Controller unknown
Version Status Constraints
20.6.4 affected —
20.9.2 affected —
20.3.6 affected —
20.7.2 affected —
20.7.1 affected —
20.5.1 affected —
20.6.2 affected —
19.3.0 affected —
20.6.1 affected —
17.2.4 affected —
18.2.0 affected —
18.4.6 affected —
19.1.0 affected —
19.2.4 affected —
19.2.929 affected —
18.3.8 affected —
18.4.303 affected —
18.3.7 affected —
18.4.1 affected —
19.2.097 affected —
19.2.0 affected —
19.2.099 affected —
18.3.6 affected —
20.4.2 affected —
19.0.0 affected —
20.9.1 affected —
20.3.5 affected —
20.3.1 affected —
18.3.5 affected —
20.6.3 affected —
18.4.3 affected —
18.4.4 affected —
18.3.3 affected —
17.2.8 affected —
20.8.1 affected —
19.2.32 affected —
19.2.2 affected —
17.2.5 affected —
18.4.0 affected —
20.4.1.1 affected —
20.1.3 affected —
20.1.2 affected —
17.2.10 affected —
19.2.098 affected —
20.1.1 affected —
17.2.6 affected —
19.2.1 affected —
18.3.4 affected —
20.4.1 affected —
17.2.9 affected —
19.2.31 affected —
19.0.1a affected —
18.3.0 affected —
17.2.7 affected —
18.4.5 affected —
20.3.4 affected —
20.3.3 affected —
20.4.1.2 affected —
20.3.2 affected —
18.3.1 affected —
20.1.12 affected —
19.2.3 affected —
20.10.1 affected —
20.6.5 affected —
20.3.7 affected —
20.9.3 affected —
20.11.1 affected —
20.6.3.2 affected —
20.4.2.3 affected —
20.3.5.1 affected —
20.3.4.3 affected —
20.9.3.1 affected —
20.6.4.1 affected —
20.3.3.2 affected —
20.6.5.2 affected —
20.3.7.1 affected —
20.11.1.1 affected —
20.10.1.1 affected —
20.6.1.2 affected —
20.1.3.1 affected —
20.9.2.2 affected —
20.6.5.3 affected —
20.6.3.3 affected —
20.3.7.2 affected —
20.6.5.4 affected —
20.9.2.3 affected —
20.9.4 affected —
20.12.1 affected —
20.3.8 affected —
20.6.6 affected —
20.12.2 affected —
20.13.1 affected —
20.9.5 affected —
20.12.3 affected —
20.6.7 affected —
20.9.5.1 affected —
20.14.1 affected —
20.12.3.1 affected —
20.12.4 affected —
20.15.1 affected —
20.9.6 affected —
20.6.8 affected —
20.16.1 affected —
20.9.5.3 affected —
20.12.4.1 affected —
20.15.2 affected —
20.12.5 affected —
20.9.7 affected —
20.15.3 affected —
20.12.5.1 affected —
20.12.5.2 affected —
20.15.4 affected —
20.9.7.1 affected —
20.18.1 affected —
20.12.6 affected —
20.9.8 affected —
20.15.4.1 affected —
20.18.2 affected —
26.1.1 affected —
20.15.4.2 affected —
20.18.2.1 affected —
20.12.5.3 affected —
20.12.6.1 affected —
20.9.8.2 affected —
20.15.5 affected —
20.18.3 affected —
20.12.7 affected —
20.9.9 affected —
20.18.2.2 affected —
20.12.5.4 affected —
20.12.7.1 affected —
20.15.5.1 affected —
20.15.4.3 affected —
20.12.6.2 affected —
20.15.5.2 affected —
20.15.4.4 affected —
26.1.1.1 affected —
20.9.9.1 affected —
20.18.3.1 affected —
26.1.1.2 affected —
20.15.4.5 affected —
20.15.5.3 affected —
20.12.7.2 affected —
20.9.9.2 affected —
Cisco Cisco Catalyst SD-WAN Manager unknown
Version Status Constraints
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 affected —
17.2.8 affected —
18.3.3.1 affected —
18.4.0 affected —
18.3.1 affected —
17.2.6 affected —
17.2.9 affected —
18.3.4 affected —
17.2.5 affected —
18.3.1.1 affected —
18.3.5 affected —
18.4.0.1 affected —
18.3.3 affected —
17.2.7 affected —
17.2.4 affected —
18.3.0 affected —
19.2.3 affected —
18.4.501_ES affected —
20.3.1 affected —
20.1.2 affected —
19.2.929 affected —
19.2.31 affected —
20.3.2 affected —
19.2.32 affected —
20.3.2_925 affected —
20.3.2.1 affected —
20.3.2.1_927 affected —
18.4.6 affected —
20.1.2_937 affected —
20.4.1 affected —
20.3.2_928 affected —
20.3.2_929 affected —
20.4.1.0.1 affected —
20.3.2.1_930 affected —
19.2.4 affected —
20.5.0.1.1 affected —
20.4.1.1 affected —
20.3.3 affected —
19.2.4.0.1 affected —
20.3.2_937 affected —
20.3.3.1 affected —
20.5.1 affected —
20.1.3 affected —
20.3.3.0.4 affected —
20.3.3.1.2 affected —
20.3.3.1.1 affected —
20.4.1.2 affected —
20.3.3.0.2 affected —
20.4.1.1.5 affected —
20.4.1.0.01 affected —
20.4.1.0.02 affected —
20.3.3.1.7 affected —
20.3.3.1.5 affected —
20.5.1.0.1 affected —
20.3.3.1.10 affected —
20.3.3.0.8 affected —
20.4.2 affected —
20.4.2.0.1 affected —
20.3.4 affected —
20.3.3.0.14 affected —
19.2.4.0.8 affected —
19.2.4.0.9 affected —
20.3.4.0.1 affected —
20.3.2.0.5 affected —
20.6.1 affected —
20.5.1.0.2 affected —
20.3.3.0.17 affected —
20.6.1.1 affected —
20.6.0.18.3 affected —
20.3.2.0.6 affected —
20.6.0.18.4 affected —
20.4.2.0.2 affected —
20.3.3.0.16 affected —
20.3.4.0.5 affected —
20.6.1.0.1 affected —
20.3.4.0.6 affected —
20.6.2 affected —
20.7.1EFT2 affected —
20.3.4.0.9 affected —
20.3.4.0.11 affected —
20.4.2.0.4 affected —
20.3.3.0.18 affected —
20.7.1 affected —
20.6.2.1 affected —
20.3.4.1 affected —
20.5.1.1 affected —
20.4.2.1 affected —
20.4.2.1.1 affected —
20.3.4.1.1 affected —
20.3.813 affected —
20.3.4.0.19 affected —
20.4.2.2.1 affected —
20.5.1.2 affected —
20.3.4.2 affected —
20.3.814 affected —
20.4.2.2 affected —
20.6.2.2 affected —
20.3.4.2.1 affected —
20.7.1.1 affected —
20.3.4.1.2 affected —
20.6.2.2.2 affected —
20.3.4.0.20 affected —
20.6.2.2.3 affected —
20.4.2.2.2 affected —
20.3.5 affected —
20.6.2.0.4 affected —
20.4.2.2.3 affected —
20.3.4.0.24 affected —
20.6.2.2.7 affected —
20.6.3 affected —
20.3.4.2.2 affected —
20.4.2.2.4 affected —
20.7.1.0.2 affected —
20.8.1 affected —
20.3.5.0.8 affected —
20.3.5.0.9 affected —
20.4.2.2.8 affected —
20.3.5.0.7 affected —
20.6.3.0.7 affected —
20.6.3.0.5 affected —
20.6.3.0.10 affected —
20.6.3.0.2 affected —
20.7.2 affected —
20.9.1EFT2 affected —
20.6.3.0.11 affected —
20.6.3.1 affected —
20.6.3.0.14 affected —
20.6.4 affected —
20.9.1 affected —
20.6.3.0.19 affected —
20.6.3.0.18 affected —
20.3.6 affected —
20.9.1.1 affected —
20.6.3.0.23 affected —
20.6.4.0.4 affected —
20.6.3.0.25 affected —
20.6.5 affected —
20.6.3.0.27 affected —
20.9.2 affected —
20.9.2.1 affected —
20.6.3.0.29 affected —
20.6.3.0.31 affected —
20.6.3.0.32 affected —
20.10.1 affected —
20.6.3.0.33 affected —
20.9.2.0.01 affected —
20.9.1_LI_Images affected —
20.10.1_LI_Images affected —
20.9.2_LI_Images affected —
20.3.7 affected —
20.9.3 affected —
20.6.5.1 affected —
20.11.1 affected —
20.11.1_LI_Images affected —
20.9.3_LI_ Images affected —
20.6.3.1.1 affected —
20.9.3.0.2 affected —
20.6.5.1.2 affected —
20.9.3.0.3 affected —
20.4.2.3 affected —
20.6.3.2 affected —
20.6.4.1 affected —
20.6.3.0.38 affected —
20.6.3.0.39 affected —
20.3.5.1 affected —
20.3.4.3 affected —
20.9.3.1 affected —
20.3.3.2 affected —
20.6.5.2 affected —
20.3.7.1 affected —
20.10.1.1 affected —
20.6.5.2.1 affected —
20.3.4.0.25 affected —
20.6.2.2.4 affected —
20.6.1.2 affected —
20.11.1.1 affected —
20.9.3.0.5 affected —
20.3.4.0.26 affected —
20.6.5.1.3 affected —
20.6.3.0.40 affected —
20.1.3.1 affected —
20.9.2.2 affected —
20.6.5.2.3 affected —
20.6.5.1.4 affected —
20.6.5.3 affected —
20.6.3.0.41 affected —
20.9.3.0.7 affected —
20.6.5.1.5 affected —
20.9.3.0.4 affected —
20.6.4.0.19 affected —
20.6.5.1.6 affected —
20.9.3.0.8 affected —
20.6.3.3 affected —
20.3.7.2 affected —
20.6.5.4 affected —
20.6.5.1.7 affected —
20.9.3.0.12 affected —
20.6.4.2 affected —
20.6.5.5 affected —
20.9.3.2 affected —
20.11.1.2 affected —
20.6.3.4 affected —
20.10.1.2 affected —
20.6.5.1.9 affected —
20.9.3.0.16 affected —
20.6.3.0.45 affected —
20.6.5.1.10 affected —
20.9.3.0.17 affected —
20.6.5.2.4 affected —
20.6.4.0.21 affected —
20.9.3.0.18 affected —
20.6.3.0.46 affected —
20.6.3.0.47 affected —
20.9.2.3 affected —
20.9.3.2_LI_Images affected —
20.9.3.0.21 affected —
20.9.3.0.20 affected —
20.9.4_LI_Images affected —
20.9.4 affected —
20.6.5.1.11 affected —
20.12.1 affected —
20.12.1_LI_Images affected —
20.6.5.1.13 affected —
20.9.3.0.23 affected —
20.6.5.2.8 affected —
20.9.4.1 affected —
20.9.4.1_LI_Images affected —
20.9.3.0.25 affected —
20.9.3.0.24 affected —
20.6.5.1.14 affected —
20.3.8 affected —
20.6.6 affected —
20.9.3.0.26 affected —
20.6.3.0.51 affected —
20.9.3.0.29 affected —
20.12.2 affected —
20.12.2_LI_Images affected —
20.6.6.0.1 affected —
20.13.1_LI_Images affected —
20.9.4.0.4 affected —
20.13.1 affected —
20.9.4.1.1 affected —
20.9.5 affected —
20.9.5_LI_Images affected —
20.12.3_LI_Images affected —
20.12.3 affected —
20.9.4.1.3 affected —
20.6.7 affected —
20.9.5.1 affected —
20.9.5.1_LI_Images affected —
20.9.4.1.6 affected —
20.14.1 affected —
20.14.1_LI_Images affected —
20.9.5.2 affected —
20.9.5.2.1 affected —
20.9.5.2_LI_Images affected —
20.12.3.1 affected —
20.12.4 affected —
20.15.1_LI_Images affected —
20.15.1 affected —
20.9.5.1.4 affected —
20.9.5.2.7 affected —
20.9.5.2.13 affected —
20.9.6 affected —
20.9.6_LI_Images affected —
20.9.5.2.14 affected —
20.6.8 affected —
20.12.4.0.03 affected —
20.16.1 affected —
20.16.1_LI_Images affected —
20.12.4_LI_Images affected —
20.9.5.2.16 affected —
20.12.4.0.4 affected —
20.12.401 affected —
20.9.5.3 affected —
20.9.5.3_LI_Images affected —
20.12.4.1_LI_Images affected —
20.12.4.1 affected —
20.9.5.2.21 affected —
20.9.6.0.3 affected —
20.12.4.0.6 affected —
20.15.2_LI_Images affected —
20.15.2 affected —
20.12.4_Monthly_ES5 affected —
20.12.5 affected —
20.12.5_LI_Images affected —
20.9.7_LI _Images affected —
20.9.7 affected —
20.15.3 affected —
20.15.3_ LI _Images affected —
20.12.501 affected —
20.12.5.1_LI_Images affected —
20.12.5.1 affected —
20.12.5.2_LI_Images affected —
20.12.5.2 affected —
20.15.3.1 affected —
20.15.4_LI_Images affected —
20.15.4 affected —
20.9.7.1_LI _Images affected —
20.9.7.1 affected —
20.18.1 affected —
20.18.1_LI_Images affected —
20.12.6_LI_Images affected —
20.12.6 affected —
20.12.5.1.01 affected —
26.0.1 affected —
20.9.8 affected —
20.9.8_LI_Images affected —
20.18.2 affected —
20.15.4.1_LI_Images affected —
20.15.4.1 affected —
20.18.2_LI_Images affected —
26.1.1 affected —
26.1.1_LI_Images affected —
20.18.2.1_LI_Images affected —
20.18.2.1 affected —
20.15.4.2_LI_Images affected —
20.15.4.2 affected —
20.12.6.1 affected —
20.12.6.1_LI_Images affected —
20.12.5.3 affected —
20.12.5.3_LI_Images affected —
20.9.8.2_LI_Images affected —
20.9.8.2 affected —
20.18.3 affected —
20.18.3_LI_Images affected —
20.15.5 affected —
20.15.5_LI_Images affected —
20.12.7 affected —
20.12.7_LI_Images affected —
20.9.9 affected —
20.9.9_LI_Images affected —
20.18.2.2 affected —
20.18.2.2_LI_Images affected —
20.12.5.4 affected —
20.12.5.4_LI_ Images affected —
20.12.7.1_LI_Images affected —
20.12.6.2_LI_Images affected —
20.12.7.1 affected —
20.15.5.1 affected —
20.15.4.3 affected —
20.15.4.3_LI_Images affected —
20.15.5.1_LI_Images affected —
20.12.6.2 affected —
20.15.5.2 affected —
20.15.5.2_LI_Images affected —
26.1.1.1_LI_Images affected —
20.15.4.4 affected —
20.15.4.4_LI_Images affected —
26.1.1.1 affected —
20.9.9.1_LI_Images affected —
20.9.9.1 affected —
20.18.3.1_LI_Images affected —
20.18.3.1 affected —
26.1.1.2 affected —
26.1.1.2_LI_Images affected —
20.15.4.5 affected —
20.15.4.5_LI_Images affected —
20.15.5.3 affected —
20.15.5.3_LI_Images affected —
20.12.7.2_LI_Images affected —
20.12.7.2 affected —
20.9.9.2 affected —
20.9.9.2_LI_Images affected —
20.12.8_LI_Images affected —

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-sdwan-faLcR3K cve-icon
History

Wed, 05 Aug 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Wed, 05 Aug 2026 17:00:00 +0000

Type Values Removed Values Added
Description As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Catalyst SD-WAN engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20310 are related to improper link resolution before file access issues that are grouped under the Common Weakness Enumeration (CWE) CWE-59.
Title Cisco SD-WAN Software Security Hardening Release - Improper Link Resolution Before File Access
Weaknesses CWE-59
References
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2026-08-05T17:45:12.726Z

Reserved: 2025-10-08T11:59:15.409Z

Link: CVE-2026-20310

cve-icon Vulnrichment

Updated: 2026-08-05T17:38:54.146Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses