Security readout for executives and security teams
Plain-English summary
CVE-2023-35347 is a Windows elevation-of-privilege issue in Microsoft Install Service. A low-privileged local user could gain stronger control over system integrity or availability on affected Windows 10, Windows 11, and Windows Server 2022 systems. It is not remotely exploitable by itself and is not listed as CISA KEV in the supplied data.
Executive priority
Treat this as high-priority patch hygiene, especially for systems where many users log in or where administrator workflows occur. It is not presented as actively exploited in the supplied evidence, but it could increase attacker impact after an initial foothold.
Technical view
The vulnerability maps to CWE-59 and has CVSS 3.1 score 7.1: local attack vector, low complexity, low privileges, no user interaction, unchanged scope, no confidentiality impact, and high integrity and availability impact. Microsoft identifies affected Windows Server 2022, Windows 10 21H2/22H2, and Windows 11 21H2/22H2 versions.
Likely exposure
Exposure is likely on endpoints or servers running the affected Windows versions that have not received the applicable Microsoft security update. The issue requires local low-privileged access, so risk is higher on shared systems, user workstations, VDI, jump hosts, and servers where untrusted users can authenticate.
Exploitation context
The supplied data does not show active exploitation, and KEV is false. Exploitation would require local access with low privileges. This is most concerning as a post-compromise privilege escalation path rather than an initial intrusion vector.
Researcher notes
Key constraints are local access and low privileges. The source bundle provides affected product families and CVSS characteristics but no exploit details. Avoid assuming exploit availability, affected editions beyond those listed, or mitigations beyond Microsoft’s advisory and normal update deployment.
Mitigation direction
- Review Microsoft’s advisory for the applicable update guidance.
- Apply current Microsoft security updates to affected Windows systems.
- Prioritize shared endpoints, jump hosts, VDI, and exposed administrative workstations.
- Reduce unnecessary local user access on sensitive Windows systems.
- Monitor vendor guidance for any revised affected-version or remediation details.
Validation and detection
- Inventory Windows Server 2022, Windows 10, and Windows 11 affected versions.
- Confirm patch status against Microsoft’s CVE-2023-35347 advisory.
- Check vulnerability scanner results for CVE-2023-35347 on Windows assets.
- Validate that high-risk shared systems are updated first.
- Document exceptions where Microsoft guidance cannot be applied immediately.
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-59: 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 lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2023-35347 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
- 7.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/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:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H/E:U/RL:O/RC:C1.85.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.1HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H/E:U/RL:O/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- Microsoft Install Service Elevation of Privilege 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.
Improper Link Resolution Before File Access ('Link Following')
Improper Link Resolution Before File Access ('Link Following') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.