Internet Connection Sharing (ICS) Denial of Service Vulnerability New
Released: Feb 11, 2025
- Assigning CNA
- Microsoft
- CVE.org link
- CVE-2025-21216
- Impact
- Denial of Service
- Max Severity
- Important
- Weakness
- CVSS Source
- Microsoft
- Vector String
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
- Metrics
- CVSS:3.1 6.5 / 5.7Base score metrics: 6.5 / Temporal score metrics: 5.7
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Exploit Code Maturity
Unproven
Remediation Level
Official Fix
Report Confidence
Confirmed
Please see Common Vulnerability Scoring System for more information on the definition of these metrics.
Exploitability
The following table provides an exploitability assessment for this vulnerability at the time of original publication.
- Publicly disclosed
- No
- Exploited
- No
- Exploitability assessment
- Exploitation Less Likely
FAQ
According to the CVSS metric, successful exploitation of this vulnerability has a high impact on availability (A:H). What does that mean for this vulnerability?
An attacker can send specially crafted packets which could affect availability of the service and result in Denial of Service (DoS).
According to the CVSS score, the attack vector is adjacent (AV:A). What does this mean for this vulnerability?
This attack is limited to systems connected to the same network segment as the attacker. The attack cannot be performed across multiple networks (for example, a WAN) and would be limited to systems on the same network switch or virtual network.
Acknowledgements
- bee13oy with Cyber Kunlun Lab
Security Updates
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle.
- 10.0.14393.7785
- 10.0.14393.7785
- 10.0.14393.7785
- Security Update
- SecurityHotpatchUpdate
- 10.0.26100.3194
- 10.0.26100.3107
- Security Update
- SecurityHotpatchUpdate
- 10.0.26100.3194
- 10.0.26100.3107
- Security Update
- SecurityHotpatchUpdate
- 10.0.26100.3194
- 10.0.26100.3107
- 10.0.25398.1425
- 10.0.22631.4890
- 10.0.22631.4890
- Security Update
- SecurityHotpatchUpdate
- 10.0.26100.3194
- 10.0.26100.3107
- 10.0.19045.5487
- 10.0.19045.5487
- 10.0.19045.5487
- 10.0.22621.4890
- 10.0.22621.4890
- 10.0.19044.5487
- 10.0.19044.5487
- 10.0.19044.5487
- Security Update
- SecurityHotpatchUpdate
- 10.0.20348.3207
- 10.0.20348.3148
- Security Update
- SecurityHotpatchUpdate
- 10.0.20348.3207
- 10.0.20348.3148
- 10.0.17763.6893
- 10.0.17763.6893
- 10.0.17763.6893
Disclaimer
Revisions
Information published.