Security readout for executives and security teams
Plain-English summary
A logged-in attacker with limited local access could exploit a memory-handling flaw in Windows Digital Media to gain higher privileges. Successful exploitation could compromise sensitive data, system integrity, and availability. The attack is local and rated high complexity, which reduces—but does not eliminate—business risk.
Executive priority
Treat this as a high-priority patching issue, especially on multi-user endpoints and sensitive servers. It is not presented as remotely exploitable or actively exploited, so emergency internet-facing containment is unsupported. Remediate through the normal accelerated Windows security-update process and verify coverage.
Technical view
CVE-2025-26640 is a Windows Digital Media use-after-free vulnerability associated with CWE-416 and CWE-415. It requires local access and low privileges, needs no user interaction, and has high attack complexity. Its CVSS 3.1 score is 7.0; successful exploitation can produce high confidentiality, integrity, and availability impact without changing scope.
Likely exposure
Exposure applies to the listed Windows 10, Windows 11, Windows Server 2019, Server 2022 23H2 Core, and Server 2025 releases when the relevant Microsoft security update is absent. Prioritize shared workstations, administrative endpoints, and servers where untrusted or lower-privileged users can obtain local access.
Exploitation context
The supplied sources do not establish active exploitation, and the CVE is not marked as included in CISA KEV. Exploitation requires an already authorized local attacker with low privileges and high-complexity conditions. No user interaction or network attack path is identified in the provided evidence.
Researcher notes
The bundle identifies a use-after-free and also maps CWE-415, but provides no component-level root cause, trigger details, fixed build numbers, or update identifiers. The CVSS vector indicates local access, high complexity, low privileges, no interaction, unchanged scope, and high impact across all three security objectives. Consult Microsoft’s advisory for build-specific remediation data.
Mitigation direction
- Review Microsoft’s CVE advisory and deploy its associated security update to affected Windows systems.
- Prioritize systems permitting local access by untrusted or lower-privileged users.
- Restrict unnecessary local accounts and privileges while patch deployment is pending.
- Check Microsoft guidance for product-specific update and restart requirements.
Validation and detection
- Inventory systems running the Windows products and versions listed in the advisory.
- Confirm the applicable Microsoft security update is installed on each affected system.
- Verify update compliance through endpoint management and vulnerability-scanning records.
- Recheck system build and update status after installation and any required restart.
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-415: 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-416: 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-2025-26640 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 Digital Media 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.
Double Free
Double Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Use After Free
Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.