Security readout for executives and security teams
Plain-English summary
CVE-2023-35319 is a Microsoft Windows Remote Procedure Call runtime denial-of-service issue. An attacker with low privileges could trigger service disruption over the network. The provided sources indicate availability impact only, not data theft or code execution.
Executive priority
Treat as a routine but time-bound Windows patching item. It is not evidenced as actively exploited, but service disruption on Windows servers can affect business operations, especially in internal networks with broad RPC reachability.
Technical view
The CVSS 3.1 vector is 6.5: network reachable, low complexity, low privileges required, no user interaction, unchanged scope, and high availability impact. The weakness is listed as CWE-125, out-of-bounds read. Microsoft lists multiple Windows client and server versions as affected.
Likely exposure
Exposure is likely on affected Windows 10, Windows 11, and Windows Server systems listed by Microsoft, especially where RPC is reachable from broad internal networks. Internet-facing RPC exposure would raise urgency, but the bundle does not confirm typical exposure paths.
Exploitation context
The bundle does not show active exploitation: KEV is false, and the CVSS exploit maturity is unproven. The issue is still operationally relevant because successful exploitation could disrupt availability without user interaction after low-privileged access.
Researcher notes
Research should focus on patch verification, affected build coverage, and exposure mapping rather than exploit reproduction. The source bundle does not provide exploit details, indicators of compromise, or specific KB numbers, so avoid assuming more than the MSRC and CVSS data support.
Mitigation direction
- Apply Microsoft's official security update for CVE-2023-35319 through normal Windows patch management.
- Prioritize systems where RPC is reachable from untrusted or broad internal networks.
- Restrict RPC exposure at network boundaries according to Microsoft and enterprise hardening guidance.
- Monitor vendor guidance for any superseded updates or platform-specific servicing requirements.
Validation and detection
- Inventory affected Windows client and server versions listed in the Microsoft advisory.
- Confirm installed cumulative/security updates include remediation for CVE-2023-35319.
- Review firewall rules and segmentation for unnecessary RPC exposure.
- Check service availability monitoring for RPC-related disruption on high-value Windows systems.
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-125: 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-2023-35319 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
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/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:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C2.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- Remote Procedure Call Runtime 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.
Out-of-bounds Read
Out-of-bounds Read represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.