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Fencer Intel
high 8.8

CVE-2025-49657 json

Windows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability

published last yr. modified 4mo ago also EUVD-2025-20648

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits
0
none known

Summary

Heap-based buffer overflow in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to execute code over a network.

Patch / fix

  • Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.27820
  • Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.1.7601.27820
  • Microsoft Windows Server 2008 Service Pack 2 6.0.6003.23418
  • Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) 6.0.6003.23418
  • Microsoft Windows Server 2012 6.2.9200.25573
  • Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.25573
  • Microsoft Windows Server 2012 R2 6.3.9600.22676
  • Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.22676
  • Microsoft Windows Server 2016 10.0.14393.8246
  • Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.8246
  • Microsoft Windows Server 2019 10.0.17763.7558
  • Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.7558
  • Microsoft Windows Server 2022 10.0.20348.3932
  • Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1732
  • Microsoft Windows Server 2025 10.0.26100.4652
  • Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.4652

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
last yr.

Exploit prediction

1.13% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

  • Microsoft Windows Server 2008 R2 Service Pack 1
  • Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation)
  • Microsoft Windows Server 2008 Service Pack 2
  • Microsoft Windows Server 2008 Service Pack 2 (Server Core installation)
  • Microsoft Windows Server 2012
  • Microsoft Windows Server 2012 (Server Core installation)
  • Microsoft Windows Server 2012 R2
  • Microsoft Windows Server 2012 R2 (Server Core installation)
  • Microsoft Windows Server 2016
  • Microsoft Windows Server 2016 (Server Core installation)
  • Microsoft Windows Server 2019
  • Microsoft Windows Server 2019 (Server Core installation)
  • Microsoft Windows Server 2022
  • Microsoft Windows Server 2022, 23H2 Edition (Server Core installation)
  • Microsoft Windows Server 2025
  • Microsoft Windows Server 2025 (Server Core installation)

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.