Security readout for executives and security teams
Plain-English summary
This Windows flaw lets an attacker who already has limited local access gain higher privileges, potentially taking broad control of an affected device. It is not a direct remote-entry vulnerability, but CISA lists it as known exploited. Unpatched Windows endpoints and servers should therefore be treated as urgent remediation targets.
Executive priority
Treat remediation as urgent because exploitation is documented through CISA KEV. Accelerate patching across affected systems, beginning with high-value servers and endpoints where attackers could obtain local access. Track exceptions explicitly and apply temporary access restrictions until updates are confirmed.
Technical view
CVE-2023-23376 is a heap-based buffer overflow (CWE-122) in the Windows Common Log File System driver. It has CVSS 3.1 score 7.8: local access, low complexity, low privileges, no user interaction, unchanged scope, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure exists on unpatched listed Windows 10, Windows 11, and Windows Server versions. Exploitation requires local access and low privileges, so systems allowing untrusted code execution, shared access, or an existing foothold face greater risk. The supplied evidence does not identify remotely exploitable exposure.
Exploitation context
CISA KEV inclusion supports active exploitation in the wild. The vulnerability is suited to privilege escalation after an attacker obtains limited local access through another weakness, malware, or valid credentials. The supplied sources do not describe exploitation prevalence, affected campaigns, or a public exploit.
Researcher notes
The supplied CVSS vector indicates a local, low-complexity privilege-escalation path with no user interaction and high impact across all three security properties. CWE-122 identifies heap-based buffer overflow behavior. The bundle does not provide vulnerable code paths, detection indicators, fixed build numbers, or technical exploitation details.
Mitigation direction
- Apply the applicable Microsoft security update for each affected Windows release.
- Prioritize internet-facing servers, shared systems, and endpoints permitting untrusted local code.
- Restrict unnecessary local access and software execution until updates are verified.
- Check Microsoft guidance for release-specific servicing or support requirements.
Validation and detection
- Inventory systems running the Windows versions listed in the Microsoft advisory.
- Verify the applicable security update is installed successfully on each affected system.
- Confirm update compliance through endpoint management and vulnerability scanning tools.
- Review security telemetry for unexpected privilege escalation on previously unpatched hosts.
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-122: 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-2023-23376 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
- 7.8 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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.
CISA KEV status
SSVC decision data
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:H/I:H/A:H/E:U/RL:O/RC:C1.85.9microsoftVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- Added to KEVCISA-ADP
CISA Known Exploited Vulnerabilities metadata lists this CVE as known exploited.
- ADP timelineCISA-ADP
CVE-2023-23376 added to KEV
- ADP timelineCISA-ADP
CVE-2023-23376 added to CISA KEV
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
- 2023-02-14T00:00:00.000Z: CVE-2023-23376 added to KEV
- 2023-02-14T00:00:00.000Z: CVE-2023-23376 added to CISA KEV
Source materials
- CVE List V5 sourceCVE List V5
- Windows Common Log File System Driver Elevation of Privilege VulnerabilityCVE reference, microsoft · vendor-advisory, patch
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-23376CVE reference, CISA-ADP · government-resource
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.
Heap-based Buffer Overflow
Heap-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.