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CVE-2026-20313

Cisco Catalyst SD-WAN Security Hardening Release - Memory Corruption Vulnerabilities

HIGH

7.7

CVSS Score

Published: August 5, 2026 at 04:33 PM UTC

Updated: October 23, 2026 at 09:10 PM UTC

2 products affected across 1 vendorCatalyst Sd WAN ManagerSd WAN Vsmart Controller

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Severity

HIGH7.7

Exploit prediction

EPSS 0.4%

SSVC

No known exploit

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-2026-20313 are related to Improper link resolution before file access issues that are grouped under the Common Weakness Enumeration (CWE) CWE-1284.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Catalyst Sd WAN Manager · Cisco

90%

17.2.10 17.2.4 17.2.5 17.2.6 17.2.7 17.2.8 17.2.9 18.2.0 18.3.0 18.3.1 18.3.1.1 18.3.3 18.3.3.1 18.3.4 18.3.5 18.3.6 18.3.6.1 18.3.7 18.3.8 18.4.0 18.4.0.1 18.4.1 18.4.3 18.4.302 18.4.303 18.4.4 18.4.5 18.4.501_ES 18.4.6 19.0.0 19.0.1a 19.1.0 19.2.0 19.2.097 19.2.098 19.2.099 19.2.1 19.2.2 19.2.3 19.2.31 19.2.32 19.2.4 19.2.4.0.1 19.2.4.0.8 19.2.4.0.9 19.2.929 19.3.0 20.1.1 20.1.1.1 20.1.12 20.1.2 20.1.2_937 20.1.3 20.1.3.1 20.10.1 20.10.1.1 20.10.1.2 20.10.1_LI_Images 20.11.1 20.11.1.1 20.11.1.2 20.11.1_LI_Images 20.12.1 20.12.1_LI_Images 20.12.2 20.12.2_LI_Images 20.12.3 20.12.3.1 20.12.3_LI_Images 20.12.4 20.12.4.0.03 20.12.4.0.4 20.12.4.0.6 20.12.4.1 20.12.4.1_LI_Images 20.12.401 20.12.4_LI_Images 20.12.4_Monthly_ES5 20.12.5 20.12.5.1 20.12.5.1.01 20.12.5.1_LI_Images 20.12.5.2 20.12.5.2_LI_Images 20.12.5.3 20.12.5.3_LI_Images 20.12.5.4 20.12.5.4_LI_ Images 20.12.501 20.12.5_LI_Images 20.12.6 20.12.6.1 20.12.6.1_LI_Images 20.12.6.2 20.12.6.2_LI_Images 20.12.6_LI_Images 20.12.7 20.12.7.1 20.12.7.1_LI_Images 20.12.7.2 20.12.7.2_LI_Images 20.12.7_LI_Images 20.13.1 20.13.1_LI_Images 20.14.1 20.14.1_LI_Images 20.15.1 20.15.1_LI_Images 20.15.2 20.15.2_LI_Images 20.15.3 20.15.3.1 20.15.3_ LI _Images 20.15.4 20.15.4.1 20.15.4.1_LI_Images 20.15.4.2 20.15.4.2_LI_Images 20.15.4.3 20.15.4.3_LI_Images 20.15.4.4 20.15.4.4_LI_Images 20.15.4.5 20.15.4.5_LI_Images 20.15.4_LI_Images 20.15.5 20.15.5.1 20.15.5.1_LI_Images 20.15.5.2 20.15.5.2_LI_Images 20.15.5.3 20.15.5.3_LI_Images 20.15.5_LI_Images 20.16.1 20.16.1_LI_Images 20.18.1 20.18.1_LI_Images 20.18.2 20.18.2.1 20.18.2.1_LI_Images 20.18.2.2 20.18.2.2_LI_Images 20.18.2_LI_Images 20.18.3 20.18.3.1 20.18.3.1_LI_Images 20.18.3_LI_Images 20.3.1 20.3.2 20.3.2.0.5 20.3.2.0.6 20.3.2.1 20.3.2.1_927 20.3.2.1_930 20.3.2_925 20.3.2_928 20.3.2_929 20.3.2_937 20.3.3 20.3.3.0.14 20.3.3.0.16 20.3.3.0.17 20.3.3.0.18 20.3.3.0.2 20.3.3.0.4 20.3.3.0.8 20.3.3.1 20.3.3.1.1 20.3.3.1.10 20.3.3.1.2 20.3.3.1.5 20.3.3.1.7 20.3.3.2 20.3.4 20.3.4.0.1 20.3.4.0.11 20.3.4.0.19 20.3.4.0.20 20.3.4.0.24 20.3.4.0.25 20.3.4.0.26 20.3.4.0.5 20.3.4.0.6 20.3.4.0.9 20.3.4.1 20.3.4.1.1 20.3.4.1.2 20.3.4.2 20.3.4.2.1 20.3.4.2.2 20.3.4.3 20.3.5 20.3.5.0.7 20.3.5.0.8 20.3.5.0.9 20.3.5.1 20.3.6 20.3.7 20.3.7.1 20.3.7.2 20.3.8 20.3.813 20.3.814 20.4.1 20.4.1.0.01 20.4.1.0.02 20.4.1.0.1 20.4.1.1 20.4.1.1.5 20.4.1.2 20.4.2 20.4.2.0.1 20.4.2.0.2 20.4.2.0.4 20.4.2.1 20.4.2.1.1 20.4.2.2 20.4.2.2.1 20.4.2.2.2 20.4.2.2.3 20.4.2.2.4 20.4.2.2.8 20.4.2.3 20.5.0.1.1 20.5.1 20.5.1.0.1 20.5.1.0.2 20.5.1.1 20.5.1.2 20.6.0.18.3 20.6.0.18.4 20.6.1 20.6.1.0.1 20.6.1.1 20.6.1.2 20.6.2 20.6.2.0.4 20.6.2.1 20.6.2.2 20.6.2.2.2 20.6.2.2.3 20.6.2.2.4 20.6.2.2.7 20.6.3 20.6.3.0.10 20.6.3.0.11 20.6.3.0.14 20.6.3.0.18 20.6.3.0.19 20.6.3.0.2 20.6.3.0.23 20.6.3.0.25 20.6.3.0.27 20.6.3.0.29 20.6.3.0.31 20.6.3.0.32 20.6.3.0.33 20.6.3.0.38 20.6.3.0.39 20.6.3.0.40 20.6.3.0.41 20.6.3.0.45 20.6.3.0.46 20.6.3.0.47 20.6.3.0.5 20.6.3.0.51 20.6.3.0.7 20.6.3.1 20.6.3.1.1 20.6.3.2 20.6.3.3 20.6.3.4 20.6.4 20.6.4.0.19 20.6.4.0.21 20.6.4.0.4 20.6.4.1 20.6.4.2 20.6.5 20.6.5.1 20.6.5.1.10 20.6.5.1.11 20.6.5.1.13 20.6.5.1.14 20.6.5.1.2 20.6.5.1.3 20.6.5.1.4 20.6.5.1.5 20.6.5.1.6 20.6.5.1.7 20.6.5.1.9 20.6.5.2 20.6.5.2.1 20.6.5.2.3 20.6.5.2.4 20.6.5.2.8 20.6.5.3 20.6.5.4 20.6.5.5 20.6.6 20.6.6.0.1 20.6.7 20.6.8 20.7.1 20.7.1.0.2 20.7.1.1 20.7.1EFT2 20.7.2 20.8.1 20.9.1 20.9.1.1 20.9.1EFT2 20.9.1_LI_Images 20.9.2 20.9.2.0.01 20.9.2.1 20.9.2.2 20.9.2.3 20.9.2_LI_Images 20.9.3 20.9.3.0.12 20.9.3.0.16 20.9.3.0.17 20.9.3.0.18 20.9.3.0.2 20.9.3.0.20 20.9.3.0.21 20.9.3.0.23 20.9.3.0.24 20.9.3.0.25 20.9.3.0.26 20.9.3.0.29 20.9.3.0.3 20.9.3.0.4 20.9.3.0.5 20.9.3.0.7 20.9.3.0.8 20.9.3.1 20.9.3.2 20.9.3.2_LI_Images 20.9.3_LI_ Images 20.9.4 20.9.4.0.4 20.9.4.1 20.9.4.1.1 20.9.4.1.3 20.9.4.1.6 20.9.4.1_LI_Images 20.9.4_LI_Images 20.9.5 20.9.5.1 20.9.5.1.4 20.9.5.1_LI_Images 20.9.5.2 20.9.5.2.1 20.9.5.2.13 20.9.5.2.14 20.9.5.2.16 20.9.5.2.21 20.9.5.2.7 20.9.5.2_LI_Images 20.9.5.3 20.9.5.3_LI_Images 20.9.5_LI_Images 20.9.6 20.9.6.0.3 20.9.6_LI_Images 20.9.7 20.9.7.1 20.9.7.1_LI _Images 20.9.7_LI _Images 20.9.8 20.9.8.2 20.9.8.2_LI_Images 20.9.8_LI_Images 20.9.9 20.9.9.1 20.9.9.1_LI_Images 20.9.9.2 20.9.9.2_LI_Images 20.9.9_LI_Images 26.0.1 26.1.1 26.1.1.1 26.1.1.1_LI_Images 26.1.1.2 26.1.1.2_LI_Images 26.1.1_LI_Images

Sd WAN Vsmart Controller · Cisco

90%

17.2.10 17.2.4 17.2.5 17.2.6 17.2.7 17.2.8 17.2.9 18.2.0 18.3.0 18.3.1 18.3.3 18.3.4 18.3.5 18.3.6 18.3.7 18.3.8 18.4.0 18.4.1 18.4.3 18.4.303 18.4.4 18.4.5 18.4.6 19.0.0 19.0.1a 19.1.0 19.2.0 19.2.097 19.2.098 19.2.099 19.2.1 19.2.2 19.2.3 19.2.31 19.2.32 19.2.4 19.2.929 19.3.0 20.1.1 20.1.12 20.1.2 20.1.3 20.1.3.1 20.10.1 20.10.1.1 20.11.1 20.11.1.1 20.12.1 20.12.2 20.12.3 20.12.3.1 20.12.4 20.12.4.1 20.12.5 20.12.5.1 20.12.5.2 20.12.5.3 20.12.5.4 20.12.6 20.12.6.1 20.12.6.2 20.12.7 20.12.7.1 20.12.7.2 20.13.1 20.14.1 20.15.1 20.15.2 20.15.3 20.15.4 20.15.4.1 20.15.4.2 20.15.4.3 20.15.4.4 20.15.4.5 20.15.5 20.15.5.1 20.15.5.2 20.15.5.3 20.16.1 20.18.1 20.18.2 20.18.2.1 20.18.2.2 20.18.3 20.18.3.1 20.3.1 20.3.2 20.3.3 20.3.3.2 20.3.4 20.3.4.3 20.3.5 20.3.5.1 20.3.6 20.3.7 20.3.7.1 20.3.7.2 20.3.8 20.4.1 20.4.1.1 20.4.1.2 20.4.2 20.4.2.3 20.5.1 20.6.1 20.6.1.2 20.6.2 20.6.3 20.6.3.2 20.6.3.3 20.6.4 20.6.4.1 20.6.5 20.6.5.2 20.6.5.3 20.6.5.4 20.6.6 20.6.7 20.6.8 20.7.1 20.7.2 20.8.1 20.9.1 20.9.2 20.9.2.2 20.9.2.3 20.9.3 20.9.3.1 20.9.4 20.9.5 20.9.5.1 20.9.5.3 20.9.6 20.9.7 20.9.7.1 20.9.8 20.9.8.2 20.9.9 20.9.9.1 20.9.9.2 26.1.1 26.1.1.1 26.1.1.2

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

Source: cverecord

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-sdwan-faLcR3K

Source: af854a3a-2127-422b-91ae-364da2661108

https://www.cve.org/Media/News/item/blog/2026/06/16/Preserving-Vulnerability-Level-Identification

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.7HIGHcisco

Attack Vector: NETWORK
Complexity: LOW
Privileges: LOW
User Interaction: NONE
Scope: CHANGED
Confidentiality: NONE
Integrity: NONE
Availability: HIGH

Vector?

Quick Info

StatusAWAITING ANALYSIS

CWE

CWE-1284

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