CVE-2026-121674: PowerShell Information Disclosure Vulnerability
CVE-2026-121674 is an information disclosure vulnerability in PowerShell, rated Important by Microsoft, with a CVSS 3.1 base score of 6.1 (Medium). An attacker can exploit it remotely over the network, without any privileges and only if a user takes an action. 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. It affects 2 products in 2 product families (Developer Tools, Azure).
Key facts
- CVE ID
- CVE-2026-121674
- Severity
- Medium CVSS 6.1
- Microsoft severity
- Important
- Impact
- Information Disclosure
- Exploited in the wild
- No
- Publicly disclosed
- No
- Exploitation likelihood
- Less Likely
- Weakness
- CWE-201
- CISA KEV
- Not listed
- Released
- Last updated
- Patch Tuesday
- November 2026 Patch Tuesday
- Product families
- Developer Tools, Azure
CVSS score and vector
Microsoft scores CVE-2026-121674 at 6.1 (temporal 5.3) using CVSS 3.1. Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C
| Metric | Value |
|---|---|
| Attack vector | Network |
| Attack complexity | High |
| Privileges required | None |
| User interaction | Required |
| Scope | Changed |
| Confidentiality impact | High |
| Integrity impact | None |
| Availability impact | None |
| Exploit code maturity | Unproven |
| Remediation level | Official fix |
| Report confidence | Confirmed |
Description
Insertion of sensitive information into sent data in Microsoft PowerShell Core allows an unauthorized attacker to disclose information over a network.
Frequently asked questions (Microsoft)
What type of information could be disclosed by this vulnerability?
Exploiting this vulnerability could allow the disclosure of credentials.
According to the CVSS metric, the attack complexity is high (AC:H). What does this mean for this vulnerability?
An attacker would need specific conditions to be in place (i.e. particular protocol settings, or configurations, etc.) before an attack could succeed, which reduces the likelihood of widespread or opportunistic exploitation.
Affected products (2)
Developer Tools
| Product | Security update | Type | Fixed build | Restart |
|---|---|---|---|---|
| PowerShell 7.6 | Release Notes | Security Update | 7.6.10 | Maybe |
Azure
| Product | Security update | Type | Fixed build | Restart |
|---|---|---|---|---|
| PowerShell 7.7 |
NIST NVD data
- NVD status
- Awaiting Analysis
- NVD CVSS
- 6.1 (MEDIUM)
- NVD weakness
- CWE-201
- Published to NVD
- NVD last modified
References
Acknowledgments
Revision history
| Version | Date | Description |
|---|---|---|
| 1.0 | Information published. |