RCE in Windows Routing and Remote Access Service (RRAS)
CVE-2025-62549 is a remote code execution vulnerability in Windows Routing and Remote Access Service (RRAS). The flaw is described as an untrusted pointer dereference in RRAS that can be triggered over the network. Available reporting indicates exploitation involves a victim initiating a connection or sending a request to an attacker-controlled or malicious server, which then returns crafted data that triggers the vulnerable condition in RRAS. Microsoft disclosed and patched the issue as part of the December 9, 2025 security updates. The vulnerability has been reported with a CVSS 3.1 base score of 8.8.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Windows RRAS remote code execution requiring user interaction (victim must initiate a connection to an attacker-controlled server that returns crafted data).
A high-severity remote code execution vulnerability in Windows Routing and Remote Access Service (RRAS) due to untrusted pointer dereference, allowing an unauthorized attacker to execute code over a network.
A high-severity vulnerability in the Windows Routing and Remote Access Service with a CVSS score of 8.8.
Specific Microsoft vulnerability affecting Windows Routing and Remote Access Service (RRAS) listed in the December 2025 Security Updates.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.