CVE-2021-1386
highpriority · track · 31EPSS 0.003 · 20 %ileEURUUSEPSS · scored 2026-10-27
A vulnerability in the dynamic link library (DLL) loading mechanism in Cisco Advanced Malware Protection (AMP) for Endpoints Windows Connector, ClamAV for Windows, and Immunet could allow an authenticated, local attacker to perform a DLL hijacking attack on an affected Windows system. To exploit this vulnerability, the attacker would need valid credentials on the system. The vulnerability is due to insufficient validation of directory search paths at run time. An attacker could exploit this vulnerability by placing a malicious DLL file on an affected system. A successful exploit could allow the attacker to execute arbitrary code with SYSTEM privileges.
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
A vendor fix is available.
- FixedCisco Immunet cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com - FixedCisco Secure Endpointcisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (9)
Products and version ranges known to be affected.
- cisco advanced malware protection for endpoints< 7.3.15nvdUScpe:2.3:a:cisco:advanced_malware_protection_for_endpoints:*:*:*:*:*:*:*:*
advisories (1)
Vendor and ecosystem advisories describing this.
- cisco-sa-amp-imm-dll-tu79hvkOCisco Advanced Malware Protection for Endpoints Windows Connector, ClamAV for Windows, and Immunet DLL Hijacking Vulnerability2021-04-07csaf · cisco_csafUS
A vulnerability in the dynamic link library (DLL) loading mechanism in Cisco Advanced Malware Protection (AMP) for Endpoints Windows Connector, ClamAV for Windows, and Immunet could allow an authenticated, local attacker to perform a DLL hijacking attack on an affected Windows system. To exploit this vulnerability, the attacker would need valid credentials on the system. The vulnerability is due to insufficient validation of directory search paths at run time. An attacker could exploit this vulnerability by placing a malicious DLL file on an affected system. A successful exploit could allow the attacker to execute arbitrary code with SYSTEM privileges. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (8)
External citations — patches, advisories, analysis.
- https://nvd.nist.gov/vuln/detail/CVE-2021-1386cnnvd
- https://packetstormsecurity.com/files/162121/Clam-AntiVirus-Toolkit-0.103.2.htmlcnnvd
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-amp-imm-dll-tu79hvkOcnnvd
- https://vigilance.fr/vulnerability/ClamAV-for-Windows-executing-DLL-code-35022cnnvd
- https://www.auscert.org.au/bulletins/ESB-2021.1166cnnvd
- https://www.cybersecurity-help.cz/vdb/SB2021041368cnnvd
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-amp-imm-dll-tu79hvkOenisa_euvd
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-amp-imm-dll-tu79hvkOVendor Advisorynvd
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