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CVE-2026-20313: Improper Validation of Specified Quantity in Input in Cisco Cisco Catalyst SD-WAN Controller

0
High
VulnerabilityCVE-2026-20313cvecve-2026-20313
Published: 08/05/2026 (08/05/2026, 16:33:12 UTC)
Source: CVE Database V5
Vendor/Project: Cisco
Product: Cisco Catalyst SD-WAN Controller

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.

CVSS v3.1

Score 7.7high

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
None
Availability
High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Affected software

Cisco

Cisco Catalyst SD-WAN Controller

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

Cisco

Cisco Catalyst SD-WAN Manager

Affected versions
=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=17.2.4=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_925=20.3.2.1=20.3.2.1_927=18.4.6=20.1.2_937=20.4.1=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=20.3.3.1=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=20.4.1.0.01=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=20.4.2.0.1=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=20.6.1=20.5.1.0.2=20.3.3.0.17=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=20.3.4.0.5=20.6.1.0.1=20.3.4.0.6=20.6.2=20.7.1EFT2=20.3.4.0.9=20.3.4.0.11=20.4.2.0.4=20.3.3.0.18=20.7.1=20.6.2.1=20.3.4.1=20.5.1.1=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=20.3.4.2=20.3.814=20.4.2.2=20.6.2.2=20.3.4.2.1=20.7.1.1=20.3.4.1.2=20.6.2.2.2=20.3.4.0.20=20.6.2.2.3=20.4.2.2.2=20.3.5=20.6.2.0.4=20.4.2.2.3=20.3.4.0.24=20.6.2.2.7=20.6.3=20.3.4.2.2=20.4.2.2.4=20.7.1.0.2=20.8.1=20.3.5.0.8=20.3.5.0.9=20.4.2.2.8=20.3.5.0.7=20.6.3.0.7=20.6.3.0.5=20.6.3.0.10=20.6.3.0.2=20.7.2=20.9.1EFT2=20.6.3.0.11=20.6.3.1=20.6.3.0.14=20.6.4=20.9.1=20.6.3.0.19=20.6.3.0.18=20.3.6=20.9.1.1=20.6.3.0.23=20.6.4.0.4=20.6.3.0.25=20.6.5=20.6.3.0.27=20.9.2=20.9.2.1=20.6.3.0.29=20.6.3.0.31=20.6.3.0.32=20.10.1=20.6.3.0.33=20.9.2.0.01=20.9.1_LI_Images=20.10.1_LI_Images=20.9.2_LI_Images=20.3.7=20.9.3=20.6.5.1=20.11.1=20.11.1_LI_Images=20.6.3.1.1=20.9.3.0.2=20.6.5.1.2=20.9.3.0.3=20.4.2.3=20.6.3.2=20.6.4.1=20.6.3.0.38=20.6.3.0.39=20.3.5.1=20.3.4.3=20.9.3.1=20.3.3.2=20.6.5.2=20.3.7.1=20.10.1.1=20.6.5.2.1=20.3.4.0.25=20.6.2.2.4=20.6.1.2=20.11.1.1=20.9.3.0.5=20.3.4.0.26=20.6.5.1.3=20.6.3.0.40=20.1.3.1=20.9.2.2=20.6.5.2.3=20.6.5.1.4=20.6.5.3=20.6.3.0.41=20.9.3.0.7=20.6.5.1.5=20.9.3.0.4=20.6.4.0.19=20.6.5.1.6=20.9.3.0.8=20.6.3.3=20.3.7.2=20.6.5.4=20.6.5.1.7=20.9.3.0.12=20.6.4.2=20.6.5.5=20.9.3.2=20.11.1.2=20.6.3.4=20.10.1.2=20.6.5.1.9=20.9.3.0.16=20.6.3.0.45=20.6.5.1.10=20.9.3.0.17=20.6.5.2.4=20.6.4.0.21=20.9.3.0.18=20.6.3.0.46=20.6.3.0.47=20.9.2.3=20.9.3.2_LI_Images=20.9.3.0.21=20.9.3.0.20=20.9.4_LI_Images=20.9.4=20.6.5.1.11=20.12.1=20.12.1_LI_Images=20.6.5.1.13=20.9.3.0.23=20.6.5.2.8=20.9.4.1=20.9.4.1_LI_Images=20.9.3.0.25=20.9.3.0.24=20.6.5.1.14=20.3.8=20.6.6=20.9.3.0.26=20.6.3.0.51=20.9.3.0.29=20.12.2=20.12.2_LI_Images=20.6.6.0.1=20.13.1_LI_Images=20.9.4.0.4=20.13.1=20.9.4.1.1=20.9.5=20.9.5_LI_Images=20.12.3_LI_Images=20.12.3=20.9.4.1.3=20.6.7=20.9.5.1=20.9.5.1_LI_Images=20.9.4.1.6=20.14.1=20.14.1_LI_Images=20.9.5.2=20.9.5.2.1=20.9.5.2_LI_Images=20.12.3.1=20.12.4=20.15.1_LI_Images=20.15.1=20.9.5.1.4=20.9.5.2.7=20.9.5.2.13=20.9.6=20.9.6_LI_Images=20.9.5.2.14=20.6.8=20.12.4.0.03=20.16.1=20.16.1_LI_Images=20.12.4_LI_Images=20.9.5.2.16=20.12.4.0.4=20.12.401=20.9.5.3=20.9.5.3_LI_Images=20.12.4.1_LI_Images=20.12.4.1=20.9.5.2.21=20.9.6.0.3=20.12.4.0.6=20.15.2_LI_Images=20.15.2=20.12.4_Monthly_ES5=20.12.5=20.12.5_LI_Images=20.9.7=20.15.3=20.12.501=20.12.5.1_LI_Images=20.12.5.1=20.12.5.2_LI_Images=20.12.5.2=20.15.3.1=20.15.4_LI_Images=20.15.4=20.9.7.1=20.18.1=20.18.1_LI_Images=20.12.6_LI_Images=20.12.6=20.12.5.1.01=26.0.1=20.9.8=20.9.8_LI_Images=20.18.2=20.15.4.1_LI_Images=20.15.4.1=20.18.2_LI_Images=26.1.1=26.1.1_LI_Images=20.18.2.1_LI_Images=20.18.2.1=20.15.4.2_LI_Images=20.15.4.2=20.12.6.1=20.12.6.1_LI_Images=20.12.5.3=20.12.5.3_LI_Images=20.9.8.2_LI_Images=20.9.8.2=20.18.3=20.18.3_LI_Images=20.15.5=20.15.5_LI_Images=20.12.7=20.12.7_LI_Images=20.9.9=20.9.9_LI_Images=20.18.2.2=20.18.2.2_LI_Images=20.12.5.4=20.12.7.1_LI_Images=20.12.6.2_LI_Images=20.12.7.1=20.15.5.1=20.15.4.3=20.15.4.3_LI_Images=20.15.5.1_LI_Images=20.12.6.2=20.15.5.2=20.15.5.2_LI_Images=26.1.1.1_LI_Images=20.15.4.4=20.15.4.4_LI_Images=26.1.1.1=20.9.9.1_LI_Images=20.9.9.1=20.18.3.1_LI_Images=20.18.3.1=26.1.1.2=26.1.1.2_LI_Images=20.15.4.5=20.15.4.5_LI_Images=20.15.5.3=20.15.5.3_LI_Images=20.12.7.2_LI_Images=20.12.7.2=20.9.9.2=20.9.9.2_LI_Images

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 08/15/2026, 13:19:17 UTC

Technical Analysis

This vulnerability relates to improper validation of specified quantity in input, specifically improper link resolution before file access in Cisco Catalyst SD-WAN Controller software. It is tracked under CWE-1284. The issue was discovered internally by Cisco during a security review and affects many exact versions of the product. The CVSS 3.1 score is 7.7 (high severity), with attack vector network, low attack complexity, requiring low privileges, no user interaction, and scope changed. The impact is limited to availability (denial of service) without affecting confidentiality or integrity. No known exploits are reported in the wild. No vendor advisory or patch information is provided in the input data.

Potential Impact

The vulnerability can cause denial of service (availability impact) on affected Cisco Catalyst SD-WAN Controller versions. It does not impact confidentiality or integrity. No active exploitation is known. The attack requires network access and low privileges but no user interaction.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Cisco has not provided explicit patch or remediation information in the available data. Users should monitor Cisco advisories for updates and apply any forthcoming patches or mitigations promptly.

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Technical Details

Data Version
5.2
Assigner Short Name
cisco
Date Reserved
2025-10-08T11:59:15.410Z
Cvss Version
3.1
State
PUBLISHED

Threat ID: 6a736b62bf8831d5392da524

Added to database: 08/05/2026, 16:57:06 UTC

Last enriched: 08/15/2026, 13:19:17 UTC

Last updated: 09/17/2026, 22:01:33 UTC

Views: 49

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