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CVE-2026-20128 is an insufficiently protected credentials vulnerability in the Data Collection Agent (DCA) feature of Cisco Catalyst SD-WAN Manager. A DCA credential file is present on affected systems and can be read through a crafted HTTP request, exposing the DCA account password. Cisco Catalyst SD-WAN Manager releases 20.18 and later are not affected.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
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.
101 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Cisco SD-WAN vulnerability mentioned as one of several other vulnerabilities discovered this year.
A Cisco SD-WAN vulnerability listed by the article as having detected exploitation in 2026.
A previously flagged actively exploited Cisco SD-WAN vulnerability referenced for context only.
A Cisco Catalyst SD-WAN Manager vulnerability identified as one of two information disclosure flaws in a group of vulnerabilities the article says attackers have been exploiting as zero- or n-days.
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.