CVE-2025-49665: Microsoft Windows 10 Version 1507 · Race Condition
Affects Microsoft Windows 10 Version 1507Source CVE Database V5
Not known to be exploited · CVSS 7.8 High.
Data as of 25 Oct 2026, 19:02 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 25% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:CExploitation evidence
Disclosed: evidence found.
CVE published 8 Jul 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft Windows 10 Version 1507 | Affected
| Fixed in– |
AI-suggested
To mitigate CVE-2025-49665 effectively, European organizations should: 1) Identify and inventory all systems running Windows 10 Version 1507 and prioritize them for remediation. 2) Apply any official patches or updates from Microsoft immediately once available. 3) Restrict local access to affected systems by enforcing strict access controls, limiting administrative privileges, and using just-in-time access models. 4) Employ endpoint detection and response (EDR) solutions to monitor for suspicious local privilege escalation attempts or unusual process behaviors related to Workspace Broker. 5) Consider upgrading legacy Windows 10 systems to supported, patched versions to eliminate exposure. 6) Implement network segmentation to isolate legacy systems from critical infrastructure and sensitive data stores. 7) Conduct regular security awareness training to reduce insider threat risks and encourage reporting of suspicious activity. 8) Use application whitelisting and least privilege principles to reduce the attack surface. 9) Monitor logs and audit trails for anomalies related to local privilege escalations. 10) Prepare incident response plans specifically addressing local privilege escalation scenarios to ensure rapid containment and remediation.
Description
Concurrent execution using shared resource with improper synchronization ('race condition') in Workspace Broker allows an authorized attacker to elevate privileges locally.