Security readout for executives and security teams
Plain-English summary
A local, already-authorized attacker could exploit a memory-reading flaw in Windows Desktop Window Manager to expose sensitive information. The issue does not alter data or disrupt systems, but its potential confidentiality impact is high. It affects specified builds of Windows 11 and Windows Server 2025.
Executive priority
Address through the normal security-patching cycle, with faster treatment for multi-user servers and endpoints exposed to less-trusted local users. The issue is not remotely exploitable according to the supplied vector, and there is no cited active exploitation, but successful use could disclose sensitive information.
Technical view
CVE-2026-35419 is a CWE-125 out-of-bounds read in the Windows DWM Core Library. Exploitation requires local access and low privileges, with no user interaction. CVSS 3.1 scores it 5.5 because successful exploitation can significantly affect confidentiality without affecting integrity or availability.
Likely exposure
Exposure is limited to the listed Windows 11 24H2, 25H2, 26H1, and Windows Server 2025 builds, including Server Core. Systems running those builds may be exposed if the corresponding Microsoft security update has not been applied. The bundle does not identify specific KB numbers or fixed build revisions.
Exploitation context
The attacker must already have authorized local access and low privileges. Attack complexity is rated low, and user interaction is unnecessary. The bundle reports no CISA KEV listing and provides no evidence of active exploitation or public exploit availability.
Researcher notes
The source bundle does not describe the exposed memory contents, exploitation boundary, attack prerequisites beyond local low privileges, or affected DWM code path. It also omits KB identifiers and corrected build numbers. Researchers and vulnerability managers should rely on Microsoft’s advisory for exact update applicability and avoid inferring broader product exposure.
Mitigation direction
- Review Microsoft’s CVE advisory for the applicable security update and installation requirements.
- Apply the Microsoft update to affected Windows systems through the organization’s approved patch process.
- Prioritize shared servers and endpoints where untrusted or lower-privileged users can execute locally.
- Restrict unnecessary local access while affected systems remain unpatched.
Validation and detection
- Inventory Windows editions, versions, and build numbers across endpoints and servers.
- Compare discovered systems with the affected products and builds listed in Microsoft’s advisory.
- Confirm the applicable Microsoft security update is installed and retained after reboot.
- Re-scan patched systems and investigate any affected builds lacking the required update.
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-2026-35419 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
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/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.
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:N/A:N/E:U/RL:O/RC:C1.83.6microsoftVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/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.
- 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
Source materials
- CVE List V5 sourceCVE List V5
- Windows DWM Core Library Information Disclosure VulnerabilityCVE reference, microsoft · vendor-advisory, patch
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.