VulnerabilityBleeping Computer
10.0 — CRITICAL
Cisco fixes SD-WAN vManage flaw exploited in zero-day attacks
Cisco has released security updates to address a vulnerability in the Catalyst SD-WAN Manager, tracked as CVE-2026-20262, that was exploited in attacks to escalate to root privileges. [...]
🤖 AI BriefingAuto-generated threat analysis
🔍Threat Overview
A zero-day vulnerability in Cisco Catalyst SD-WAN Manager (CVE-2026-20262) was exploited in attacks, allowing attackers to escalate to root privileges. The vulnerability stems from insufficient validation of user-supplied input during file uploads.
⚙️Technical Details
💥Impact Assessment
Severity: critical
🛡️Recommended Actions
1Apply the latest security patch to affected systems immediately
2Monitor logs for suspicious activity related to file uploads
3Implement additional security controls, such as intrusion detection systems (IDS) and antivirus software
📦Affected Products
Cisco Catalyst Sd-Wan ManagerCisco Sd-Wan Vsmart ControllerCisco Catalyst SD-WAN Manager
🔐NVD Verified DataVERIFIED
CVE-2026-20133 ↗CVSS 7.5 — HIGH
Attack Vector
NETWORK
Complexity
LOW
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NWeaknesses
CWE-200
Affected Products (CPE)
Cisco Catalyst Sd-Wan Manager
CVE-2026-20128 ↗CVSS 7.5 — HIGH
Attack Vector
LOCAL
Complexity
HIGH
Vector String
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:HWeaknesses
CWE-257
Affected Products (CPE)
Cisco Catalyst Sd-Wan Manager
CVE-2026-20122 ↗CVSS 5.4 — MEDIUM
Attack Vector
NETWORK
Complexity
LOW
Vector String
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:NWeaknesses
CWE-648
Affected Products (CPE)
Cisco Catalyst Sd-Wan Manager
CVE-2026-20182 ↗CVSS 10 — CRITICAL
Attack Vector
NETWORK
Complexity
LOW
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HWeaknesses
CWE-287
Affected Products (CPE)
Cisco Catalyst Sd-Wan ManagerCisco Sd-Wan Vsmart Controller
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