CVE-2026-54982: CWE-191: Integer Underflow (Wrap or Wraparound) in Microsoft Windows 10 Version 1607
Integer underflow (wrap or wraparound) in Reliable Multicast Transport Driver (RMCAST) allows an unauthorized attacker to execute code over an adjacent network.
AI Analysis
Technical Summary
This vulnerability involves an integer underflow (wrap or wraparound) in the RMCAST component of Windows 10 Version 1607 (build 10.0.14393.0). Exploitation could allow an attacker on an adjacent network to execute arbitrary code. The vulnerability is tracked as CVE-2026-54982 and is classified under CWE-191. Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation of this vulnerability could result in remote code execution by an unauthorized attacker on an adjacent network. The impact includes full confidentiality, integrity, and availability compromise of the affected system, as indicated by the CVSS vector (C:H/I:H/A:H). There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft for Windows 10 Version 1607 (build 10.0.14393.0) as detailed in the Microsoft security advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54982. Applying this patch will remediate the vulnerability.
CVE-2026-54982: CWE-191: Integer Underflow (Wrap or Wraparound) in Microsoft Windows 10 Version 1607
Description
Integer underflow (wrap or wraparound) in Reliable Multicast Transport Driver (RMCAST) allows an unauthorized attacker to execute code over an adjacent network.
CVSS v3.1
Score 8.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an integer underflow (wrap or wraparound) in the RMCAST component of Windows 10 Version 1607 (build 10.0.14393.0). Exploitation could allow an attacker on an adjacent network to execute arbitrary code. The vulnerability is tracked as CVE-2026-54982 and is classified under CWE-191. Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation of this vulnerability could result in remote code execution by an unauthorized attacker on an adjacent network. The impact includes full confidentiality, integrity, and availability compromise of the affected system, as indicated by the CVSS vector (C:H/I:H/A:H). There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft for Windows 10 Version 1607 (build 10.0.14393.0) as detailed in the Microsoft security advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54982. Applying this patch will remediate the vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-16T14:10:05.868Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54982","vendor":"Microsoft"}]
Threat ID: 6a566f7d68715ace43e6bb97
Added to database: 07/14/2026, 17:18:53 UTC
Last enriched: 08/13/2026, 15:23:59 UTC
Last updated: 08/25/2026, 22:52:12 UTC
Views: 42
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