CVE-2025-54106: Microsoft Windows Server 2012 R2 · Integer Overflow or Wraparound
Affects Microsoft Windows Server 2012 R2Source CVE Database V5
Not known to be exploited · CVSS 8.8 High.
Data as of 26 Oct 2026, 10:12 UTC
- EPSS
- 1.4% chance of exploitation in 30 days – higher than 73% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:CExploitation evidence
Disclosed: evidence found.
CVE published 9 Sep 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 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft Windows Server 2012 R2 | Affected
| Fixed in– |
AI-suggested
Until official patches are released, organizations should implement specific mitigations to reduce exposure. First, disable the Routing and Remote Access Service (RRAS) if it is not essential to operations, as this removes the attack surface. For environments requiring RRAS, restrict network access to the service using firewall rules to limit inbound traffic only to trusted sources and networks. Employ network segmentation to isolate critical servers running Windows Server 2012 R2 from less secure network zones. Monitor network traffic for anomalous or malformed packets targeting RRAS ports, using intrusion detection/prevention systems (IDS/IPS) with updated signatures. Enable enhanced logging and alerting on RRAS to detect suspicious activity early. Consider deploying host-based application control or endpoint detection and response (EDR) solutions to identify exploitation attempts. Plan and prioritize patch management for Windows Server 2012 R2 systems, including testing and deployment once Microsoft releases security updates. Additionally, educate network administrators about this vulnerability and encourage vigilance for unusual system behavior. Avoid relying solely on user interaction mitigation, as crafted network packets may be processed automatically by RRAS.
Description
Integer overflow or wraparound in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to execute code over a network.