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CVE-2026-20310 is a critical improper link resolution before file access vulnerability in Cisco Catalyst SD-WAN Software, affecting Cisco Catalyst SD-WAN Controller and Cisco Catalyst SD-WAN Manager. The issue falls under CWE-59 and stems from unsafe handling of links during file access operations, which can cause the software to follow attacker-influenced symbolic links or equivalent references and access unintended files or resources. Cisco grouped this issue within a broader security hardening release produced after an internal security review. The vulnerability is remotely exploitable and affects Catalyst SD-WAN deployments across deployment models regardless of device configuration.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
14 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical authentication-related vulnerability in Cisco Catalyst SD-WAN that could allow attackers to access otherwise restricted areas.
A critical improper link resolution before file access vulnerability affecting Cisco Catalyst SD-WAN Software.
A critical Catalyst SD-WAN vulnerability described as improper link resolution before file access.
A critical Cisco Catalyst SD-WAN Software vulnerability involving improper link resolution before file access, potentially enabling symbolic link abuse to access unintended files.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.