EUVD-2026-44259
GHSA-7x4x-wrp3-r2gg
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Network-reachable EoP needing an authenticated low-priv account (PR:L), no user interaction, low complexity, with full high C/I/A impact and no scope change.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Integer overflow or wraparound in Windows Remote Access Service Infrastructure allows an authorized attacker to elevate privileges over a network.
AnalysisAI
Privilege escalation in the Windows Remote Access Service (RRAS) Infrastructure allows an authenticated attacker to elevate privileges over the network by triggering an integer overflow (CWE-190) in affected code paths. The flaw affects a broad range of Windows 10, Windows 11, and Windows Server releases (2012 R2 through 2025), and Microsoft has released a patch. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the target run the Windows Remote Access Service (RRAS) Infrastructure, and that the attacker already hold low-level authenticated privileges (PR:L) with network reachability (AV:N) to the service; no user interaction is required (UI:N) and attack complexity is low (AC:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H (base 8.8, High) describes a network-reachable attack of low complexity requiring low privileges, no user interaction, and full high impact to confidentiality, integrity, and availability without scope change - a strong signal for prioritization. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has obtained a low-privileged authenticated foothold on a network reachable to an affected Windows host sends crafted input to the RRAS infrastructure that drives an arithmetic value past its integer bound. The resulting undersized allocation and memory corruption let the attacker elevate to a higher privilege context on the target. … |
| Remediation | Patch available per vendor advisory: apply the Microsoft security update for CVE-2026-56647 as documented at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56647, selecting the KB matching each affected Windows 10/11 or Windows Server build. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows 10, Windows 11, and Windows Server systems running RRAS and assess which are accessible from authenticated network users. …
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Same weakness CWE-190 – Integer Overflow or Wraparound
View allSame technique Buffer Overflow
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External POC / Exploit Code
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