(TLP:CLEAR) Weekly Vulnerabilities to Prioritize – June 25, 2026

The below vulnerabilities have been identified by WaterISAC analysts as important for water and wastewater utilities to prioritize in their vulnerability management efforts. WaterISAC shares critical vulnerabilities that affect widely used products and may be under active exploitation. WaterISAC draws additional awareness in alerts and advisories when vulnerabilities are confirmed to be impacting, or have a high likelihood of impacting, water and wastewater utilities. Members are encouraged to regularly review these vulnerabilities, many of which are often included in CISA’s Known Exploited Vulnerabilities (KEV) Catalog.

Cisco Catalyst SD-WAN Manager Improper Encoding or Escaping of Output Vulnerability
CVSS 3.1: 7.8
CVEs: CVE-2026-20245
Description: This vulnerability is being reprioritized due to threat intelligence received from Mandiant. A vulnerability in the CLI of Cisco Catalyst SD-WAN Controller, could allow an authenticated, local attacker to execute arbitrary commands as root by supplying a crafted file to the affected system. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by uploading a crafted file to the affected system. A successful exploit could allow the attacker to perform command injection attacks on an affected system and elevate their privileges as the root user.  To exploit this vulnerability, the attacker must have netadmin privileges on the affected system. This would require valid credentials or exploitation of or . Cisco is not aware of successful exploitation by other methods. Cisco has observed limited cases where the exploitation of this bug resulted in a configuration change pushed to edge devices. Cisco recommends that customers upgrade to the fixed software that is documented in the that was published on May 14, 2026, and verify the configuration of the edge devices. CISA added these vulnerabilities to its Known Exploited Vulnerabilities Catalog.
Original Source: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-privesc-4uxFrdzx
Additional Reading:

• Zero-Day Exploitation of Vulnerability (CVE-2026-20245) in Cisco Catalyst SD-WAN Manager
• Mandiant reveals how Cisco SD-WAN zero-day attacks gained root access

Lantronix EDS5000 Code Injection Vulnerability
CVSS 3.1: 9.8CVEs: CVE-2025-67038Description: An issue was discovered in Lantronix EDS5000 2.1.0.0R3. The HTTP RPC module executes a shell command to write logs when user’s authantication fails. The username is directly concatenated with the command without any sanitization. This allow attackers to inject arbitrary OS commands into the username parameter. Injected commands are executed with root privileges. CISA added this vulnerabilities to its Known Exploited Vulnerability Catalog.
Sources: https://www.lantronix.com/
Additional Reading:

• Cyber Intel Brief: CVE-2025-67038 and Serial-to-Ethernet Converters

Ubiquiti UniFi OS Improper Access Control Vulnerability
CVSS v3.1: 10.0
CVE: CVE-2026-34908
Description: A malicious actor with access to the network could exploit an Improper Access Control vulnerability found in UniFi OS devices to make unauthorized changes to the system. CISA added this vulnerabilities to its Known Exploited Vulnerability Catalog.
Source: https://community.ui.com/releases/Security-Advisory-Bulletin-064-064/84811c09-4cf4-42ab-bd61-cc994445963b

Ubiquiti UniFi OS Path Traversal Vulnerability
CVSS v3.1: 10.0
CVE: CVE-2026-34909
Description: A malicious actor with access to the network could exploit a Path Traversal vulnerability found in UniFi OS devices to access files on the underlying system that could be manipulated to access an underlying account. CISA added this vulnerabilities to its Known Exploited Vulnerability Catalog.
Source: https://community.ui.com/releases/Security-Advisory-Bulletin-064-064/84811c09-4cf4-42ab-bd61-cc994445963b

Ubiquiti UniFi OS Improper Input Validation Vulnerability
CVSS 3.1: 10.0
CVEs: CVE-2026-34910
Description: A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS devices to execute a Command Injection. CISA added this vulnerabilities to its Known Exploited Vulnerability Catalog.Original Source: https://community.ui.com/releases/Security-Advisory-Bulletin-064-064/84811c09-4cf4-42ab-bd61-cc994445963b