Security readout for executives and security teams
Plain-English summary
A logged-in attacker with limited privileges could exploit a timing flaw in the Windows USB Print Driver to gain higher local privileges. Successful exploitation could compromise sensitive data, system integrity, and availability. The attack is local, requires prior authorized access, and is considered technically difficult, but affected business endpoints and servers should still be patched promptly.
Executive priority
Treat this as a high-priority patching item, particularly where many users share systems or low-privileged accounts can access sensitive servers. It is less urgent than an internet-reachable or confirmed exploited flaw, but successful exploitation could provide broad control of an affected host. Track remediation to completion through normal expedited patch governance.
Technical view
CVE-2026-54996 is an improper-synchronization race condition in the Windows USB Print Driver, associated with CWE-362 and CWE-125. It has CVSS 3.1 score 7.0: local access, high attack complexity, low privileges, no user interaction, unchanged scope, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to the listed Windows 11 24H2, 25H2, and 26H1 versions, plus Windows Server 2025, including Server Core, at the specified builds. The bundle does not establish whether particular configurations, printer usage, or later builds remain vulnerable. Inventory and vendor-update status are therefore essential.
Exploitation context
The attacker must already have authorized, low-privileged local access and successfully win a high-complexity race condition. No user interaction is required. The CVSS exploit-maturity value is unproven, and the CVE is not identified as a CISA KEV entry in the supplied bundle. No active exploitation evidence is provided.
Researcher notes
The supplied evidence identifies concurrent shared-resource execution with improper synchronization; CWE-125 additionally indicates an out-of-bounds read classification. Root-cause details, affected code paths, race timing, resulting privilege level, indicators of compromise, and exact update identifiers are absent. Researchers should consult the Microsoft advisory and CVE record without assuming unsupported prerequisites or exploitability conditions.
Mitigation direction
- Apply Microsoft’s security update for CVE-2026-54996 according to the vendor advisory.
- Prioritize shared workstations, developer systems, and servers permitting low-privileged local access.
- Review Microsoft guidance for prerequisites, affected builds, and any deployment-specific mitigations.
- Restrict unnecessary local access while updates are being tested and deployed.
Validation and detection
- Inventory systems running the affected Windows products and listed build versions.
- Confirm the applicable Microsoft security update is installed successfully on each affected system.
- Verify system build and update status after required restarts.
- Review endpoint telemetry for unexpected local privilege changes or suspicious print-driver activity.
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 lookupCWE-362: 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-2026-54996 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 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:H/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.
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:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C15.9microsoftVulnerability scoring details
Base CVSS 3.1 score
7HighVector: CVSS:3.1/AV:L/AC:H/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.
- 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 USB Print Driver Elevation of Privilege 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.
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.