7.5 HighCWE-321
CVE-2026-5426
KnowledgeDeliver deployments before February 24, 2026 use a static ASP.NET/IIS machineKey value
Digital KnowledgeKnowledgeDeliver
Status
- Not in CISA KEV
- Vendor fix available
Exploit probabilityEPSSchecked 24 Oct
0.8%probability of exploitation in the next 30 days
Higher than 57% of scored CVEs
SeverityCVSS
7.5High
Description NVD
Hard-coded ASP.NET/IIS machineKey value in Digital Knowledge KnowledgeDeliver deployments prior to February 24, 2026 allows adversaries to circumvent ViewState validation mechanisms and achieve remote code execution via malicious ViewState deserialization attacks
Coverage 3 articles · 3 outlets
See the full timelineShow as table
| Published (UTC) | Outlet | Headline |
|---|---|---|
| Mon 25 May · 06:21 UTC | Google Cloud | KnowledgeDeliver hit by CVE-2026-5426, allowing RCE attacks |
| Mon 25 May · 10:32 UTC | SecurityOnline | CVE-2026-5426 Flaw Lets Attackers Hijack Knowledge Deliver LMS |
| Tue 26 May · 11:32 UTC | SecurityWeek | Hackers Exploited KnowledgeDeliver Zero-Day for Web Shell Deployment |
- Hackers Exploited KnowledgeDeliver Zero-Day for Web Shell DeploymentSecurityWeek
- CVE-2026-5426 Flaw Lets Attackers Hijack Knowledge Deliver LMSSecurityOnline
- KnowledgeDeliver hit by CVE-2026-5426, allowing RCE attacksGoogle Cloud · first in our coverage