Digest · Tuesday
Security digest: October 7, 2025
1 known exploited (cisa kev) addition and 1 critical advisory.
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Take stock
- Do you run any of these? Synacor Zimbra Collaboration Suite (ZCS). They are being exploited in the wild (CISA KEV). Patch or mitigate if you do; CISA’s federal deadline is 2025-10-28.
- NuGet: 1 critical advisory (
Akka.Remote,Akka.Cluster). Check withdotnet list package --vulnerable --include-transitive. - 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) 1
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-2025-27915 | Synacor Zimbra Collaboration Suite (ZCS) Synacor Zimbra Collaboration Suite (ZCS) Cross-site Scripting Vulnerability | 2025-10-28 |
Critical advisories by ecosystem 1
GitHub-reviewed advisories rated critical, published this day (Pacific time).
NuGet 1
Check: dotnet list package --vulnerable --include-transitive
- Akka.Remote TLS did not properly implement certificate-based authentication CVE-2025-61778 CVSS 9.3 Critical
Akka.Remote>= 1.2.0, < 1.5.52 → fixed in 1.5.52;Akka.Cluster>= 1.2.0, < 1.5.52 → fixed in 1.5.52