Security readout for executives and security teams
Plain-English summary
This is a denial-of-service flaw in Windows CryptoAPI. An unauthenticated network attacker could cause affected Windows systems to lose availability, but the provided sources do not describe data theft, code execution, or privilege escalation. Business urgency is high where affected Windows clients or servers support critical services.
Executive priority
Treat as high priority for critical Windows servers because the impact is availability loss, not confidentiality compromise. Patch through normal emergency or accelerated Windows update processes, with priority based on business criticality and exposure.
Technical view
CVE-2023-35339 is a Windows CryptoAPI denial-of-service vulnerability, CWE-400, with CVSS 3.1 score 7.5. The vector is network, low complexity, no privileges, no user interaction, and high availability impact only. Affected products include listed Windows 10, Windows 11, Windows Server 2016, 2019, 2022, and Server Core variants.
Likely exposure
Exposure is likely where organizations still run the affected Windows builds listed by Microsoft. The bundle does not identify a narrower feature flag, service, port, or configuration condition, so validation should start with Windows asset inventory and patch state.
Exploitation context
The source bundle marks CISA KEV as false and provides no cited evidence of active exploitation. The CVSS vector indicates remote unauthenticated denial of service is possible, but the provided sources do not include exploit maturity details beyond exploit code maturity listed as unproven.
Researcher notes
The public bundle is sparse: it identifies component, impact class, affected products, CVSS vector, CWE-400, and official-fix status, but not root cause, reachable interface, or reliable detection artifacts. Avoid assuming exploitability details beyond the stated CVSS metrics.
Mitigation direction
- Apply Microsoft’s official security update for CVE-2023-35339.
- Prioritize affected Windows servers supporting critical business services.
- Include Server Core installations in patch scope.
- Use vendor guidance if patch applicability is unclear.
- Monitor Microsoft advisory updates for revised affected products or guidance.
Validation and detection
- Inventory Windows versions against the affected product list.
- Confirm cumulative update status through endpoint management tooling.
- Run authenticated vulnerability scanning after patch deployment.
- Verify critical systems remain stable after remediation.
- Check Microsoft’s advisory for product-specific update applicability.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-400: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2023-35339 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- Windows CryptoAPI Denial of Service VulnerabilityCVE reference · vendor-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Uncontrolled Resource Consumption
Uncontrolled Resource Consumption represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.