McAfee Endpoint Security on Linux Installation toctou

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
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.
7.6$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in McAfee Endpoint Security on Linux. This affects an unknown part of the component Installation. Performing a manipulation results in toctou. This vulnerability is reported as CVE-2021-23892. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in McAfee Endpoint Security on Linux (version now known). It has been classified as critical. This affects some unknown processing of the component Installation. The manipulation with an unknown input leads to a toctou vulnerability. CWE is classifying the issue as CWE-367. The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was disclosed 05/12/2021 as SB10355. The advisory is shared at kc.mcafee.com. This vulnerability is uniquely identified as CVE-2021-23892. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 02/25/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.6

VulDB Base Score: 7.5
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.0
NVD Vector: 🔍

CNA Base Score: 8.2
CNA Vector (McAfee): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Toctou
CWE: CWE-367 / CWE-362
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/12/2021 🔍
05/12/2021 +119 days 🔍
05/12/2021 +0 days 🔍
02/25/2026 +1750 days 🔍

Sourcesinfo

Vendor: mcafee.com

Advisory: SB10355
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-23892 (🔍)
GCVE (CVE): GCVE-0-2021-23892
GCVE (VulDB): GCVE-100-174957

Entryinfo

Created: 05/12/2021 14:50
Updated: 02/25/2026 04:53
Changes: 05/12/2021 14:50 (37), 05/15/2021 14:20 (3), 05/15/2021 14:22 (1), 02/25/2026 04:53 (42)
Complete: 🔍
Cache ID: 216::103

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