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Severity by source

Vendor (microsoft) PRIMARY
5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
vuln.today AI
5.3 MEDIUM

Network-reachable service with no auth required; memory leak causes only partial availability degradation, no confidentiality or integrity impact.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Primary rating from Vendor (microsoft).

CVSS VectorVendor: microsoft

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

Lifecycle Timeline

2
Analysis Generated
Jul 14, 2026 - 21:57 vuln.today
CVE Published
Jul 14, 2026 - 17:05 cve.org
MEDIUM 5.3

DescriptionCVE.org

Missing release of memory after effective lifetime in Windows Cryptographic Services allows an unauthorized attacker to deny service over a network.

AnalysisAI

Windows Cryptographic Services across a broad range of Windows 10, Windows 11, and Windows Server versions fails to release allocated memory after its effective lifetime (CWE-401), enabling a remote unauthenticated attacker to cause a denial-of-service condition over the network. The CVSS vector (AV:N/AC:L/PR:N/UI:N) confirms exploitation requires no authentication, no user interaction, and no elevated privileges against default configurations. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Identify reachable Windows target
Delivery
Send crafted cryptographic service requests
Exploit
Trigger memory allocation without release
Execution
Repeat to exhaust CryptSvc memory
Persist
Cryptographic operations fail
Impact
Downstream services disrupted

Vulnerability AssessmentAI

Exploitation No authentication is required - the CVSS vector PR:N confirms exploitation by unauthenticated remote attackers. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS base score of 5.3 (Medium) is appropriate for this denial-of-service memory leak: availability impact is rated Low (A:L), meaning the degradation is partial or gradual rather than an immediate crash, and there is no confidentiality or integrity impact (C:N/I:N). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario A remote unauthenticated attacker sends a high volume of crafted network requests targeting a Windows endpoint's Cryptographic Services interface - for example, malformed certificate validation or key-exchange requests. Each processed request allocates memory that is never freed, causing CryptSvc's memory footprint to grow over time. …
Remediation The primary remediation is to apply the Microsoft-released patch for CVE-2026-44806, available via Windows Update and the Microsoft Update Catalog, referenced at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44806. … Detailed patch versions, workarounds, and compensating controls in full report.

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CVE-2026-44806 vulnerability details – vuln.today

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