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Description
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
Basic information
Type
unreviewed
Severity
high Advisory on GitHub
Open advisory ↗ Repository advisory
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Source code
Not specified Published (advisory)
2026-04-16 18:31:22 UTC
Updated
2026-05-26 21:32:41 UTC
NVD published
2026-04-16
EPSS Score
Score
Percentile
0.07%
21.54%
CVSS Scores
Base score
Version
Severity
Vector
7.5
3.1
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CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
CWEs
CWE id
Name
CWE-321
Use of Hard-coded Cryptographic Key
cvelogic
Threat Intelligence