Microsoft Windows Print Spooler Service Privilege Escalation

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CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.8$25k-$100k0.48

A vulnerability was found in Microsoft Windows (Operating System) (the affected version unknown). It has been classified as very critical. This affects an unknown function of the component Print Spooler Service. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Windows Print Spooler Elevation of Privilege Vulnerability

The weakness was presented 07/15/2021 as confirmed security guidance (Website). The advisory is shared at portal.msrc.microsoft.com. This vulnerability is uniquely identified as CVE-2021-34481 since 06/09/2021. The exploitability is told to be easy. It is possible to initiate the attack remotely. The successful exploitation requires a authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $25k-$100k at the moment (estimation calculated on 07/19/2021).

It is declared as functional.

It is possible to mitigate the problem by applying the configuration setting Stop-Service -Name Spooler -Force; Set-Service -Name Spooler -StartupType Disabled.

Productinfoedit

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CPE 2.3infoedit

CPE 2.2infoedit

CVSSv3infoedit

VulDB Meta Base Score: 8.3
VulDB Meta Temp Score: 7.8

VulDB Base Score: 8.8
VulDB Temp Score: 8.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 7.8
Vendor Vector (Microsoft): 🔒

CVSSv2infoedit

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfoedit

Class: Unknown
CWE: Unknown
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Status: Functional

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfoedit

Recommended: Config
Status: 🔍

0-Day Time: 🔒

Config: Stop-Service -Name Spooler -Force; Set-Service -Name Spooler -StartupType Disabled

Timelineinfoedit

06/09/2021 CVE assigned
07/15/2021 +36 days Advisory disclosed
07/16/2021 +0 days VulDB entry created
07/19/2021 +3 days VulDB last update

Sourcesinfoedit

Vendor: https://www.microsoft.com/
Product: https://www.microsoft.com/en-us/windows

Advisory: portal.msrc.microsoft.com
Status: Confirmed

CVE: CVE-2021-34481 (🔒)

Entryinfoedit

Created: 07/16/2021 10:56 AM
Updated: 07/19/2021 01:30 PM
Changes: (2) source_cve_assigned source_cve_nvd_summary
Complete: 🔍

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