Digest · Monday
Security digest: April 20, 2026
8 known exploited (cisa kev) additions and 1 critical advisory.
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Take stock
- Do you run any of these? Cisco Catalyst SD-WAN Manager, Cisco Catalyst SD-WAN Manger, Synacor Zimbra Collaboration Suite (ZCS), Quest KACE Systems Management Appliance (SMA), Kentico Kentico Xperience, JetBrains TeamCity, PaperCut NG/MF. They are being exploited in the wild (CISA KEV). Patch or mitigate if you do; CISA’s federal deadline is 2026-04-23.
- Maven: 1 critical advisory (
org.apache.kafka:kafka-clients). Check withmvn dependency:tree -Dincludes=<groupId>:<artifactId>. - None of it touches your stack? Then there is nothing to do today. That is a result, not a failure to read carefully.
Known exploited (CISA KEV) 8
Added to CISA’s catalog on this day: confirmed exploitation in the wild. Due date = CISA’s deadline for US federal agencies.
| CVE | Product and flaw | CISA due |
|---|---|---|
| CVE-2026-20133 | Cisco Catalyst SD-WAN Manager Cisco Catalyst SD-WAN Manager Exposure of Sensitive Information to an Unauthorized Actor Vulnerability | 2026-04-23 |
| CVE-2026-20128 | Cisco Catalyst SD-WAN Manager Cisco Catalyst SD-WAN Manager Storing Passwords in a Recoverable Format Vulnerability | 2026-04-23 |
| CVE-2026-20122 | Cisco Catalyst SD-WAN Manger Cisco Catalyst SD-WAN Manager Incorrect Use of Privileged APIs Vulnerability | 2026-04-23 |
| CVE-2025-48700 | Synacor Zimbra Collaboration Suite (ZCS) Synacor Zimbra Collaboration Suite (ZCS) Cross-site Scripting Vulnerability | 2026-04-23 |
| CVE-2025-32975 | Quest KACE Systems Management Appliance (SMA) Quest KACE Systems Management Appliance (SMA) Improper Authentication Vulnerability | 2026-05-04 |
| CVE-2025-2749 | Kentico Kentico Xperience Kentico Xperience Path Traversal Vulnerability | 2026-05-04 |
| CVE-2024-27199 | JetBrains TeamCity JetBrains TeamCity Relative Path Traversal Vulnerability Ransomware | 2026-05-04 |
| CVE-2023-27351 | PaperCut NG/MF PaperCut NG/MF Improper Authentication Vulnerability Ransomware | 2026-05-04 |
Critical advisories by ecosystem 1
GitHub-reviewed advisories rated critical, published this day (Pacific time).
Maven 1
Check: mvn dependency:tree -Dincludes=<groupId>:<artifactId>
- Apache Kafka does not validate JWT tokens in its OAUTHBEARER authentication implementation CVE-2026-33557 CVSS 9.1 Critical
org.apache.kafka:kafka-clients>= 4.1.0, < 4.1.2 → fixed in 4.1.2