CVE-2026-113855: Windows DNS Remote Code Execution Vulnerability
CVE-2026-113855 is a remote code execution vulnerability in Windows DNS, rated Important by Microsoft, with a CVSS 3.1 base score of 7.5 (High). An attacker can exploit it from an adjacent network, without any privileges and without user interaction. Microsoft has not reported exploitation in the wild and rates exploitation as less likely. Microsoft released the fix on 10 November 2026 in the November 2026 Patch Tuesday, delivered through 2 security updates (KB5131080, KB5131077). It affects 2 products in 1 product family (Windows).
Key facts
- CVE ID
- CVE-2026-113855
- Severity
- High CVSS 7.5
- Microsoft severity
- Important
- Impact
- Remote Code Execution
- Exploited in the wild
- No
- Publicly disclosed
- No
- Exploitation likelihood
- Less Likely
- Weakness
- CWE-908
- CISA KEV
- Not listed
- Released
- Last updated
- Patch Tuesday
- November 2026 Patch Tuesday
- Product families
- Windows
CVSS score and vector
Microsoft scores CVE-2026-113855 at 7.5 (temporal 6.5) using CVSS 3.1. Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
| Metric | Value |
|---|---|
| Attack vector | Adjacent network |
| Attack complexity | High |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality impact | High |
| Integrity impact | High |
| Availability impact | High |
| Exploit code maturity | Unproven |
| Remediation level | Official fix |
| Report confidence | Confirmed |
Description
Use of uninitialized resource in Windows DNS allows an unauthorized attacker to execute code over an adjacent network.
Frequently asked questions (Microsoft)
Why is the attack complexity rated High?
Successful exploitation requires a non-default configuration in which an administrator has explicitly authorized the attacker's system to receive DNS zone transfers.
Affected products (2)
Windows
Security updates (2)
NIST NVD data
- NVD status
- Awaiting Analysis
- NVD CVSS
- 7.5 (HIGH)
- NVD weakness
- CWE-908
- Published to NVD
- NVD last modified
References
Acknowledgments
- bccc95a61a3cc79d7b2c4423c808f744
Revision history
| Version | Date | Description |
|---|---|---|
| 1.0 | Information published. |