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CVE-2021-1386

24
FAUCET Score

CVE-2021-1386 is a DLL hijacking vulnerability affecting Cisco AMP for Endpoints Windows Connector, ClamAV for Windows, and Immunet. An authenticated, local attacker could exploit insufficient validation of directory search paths to execute arbitrary code with SYSTEM privileges by placing a malicious DLL file on the system. This vulnerability has a CVSS score of 7.8 (HIGH) due to its local attack vector and high impact on confidentiality, integrity, and availability. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 7.3.15CPE matchmatch criteria
cpe:2.3:a:cisco:advanced_malware_protection_for_endpoints:*:*:*:*:*:windows:*:*
< 0.103.2CPE matchmatch criteria
cpe:2.3:a:cisco:clamav:*:*:*:*:*:windows:*:*
< 7.4.0CPE matchmatch criteria
cpe:2.3:a:cisco:immunet:*:*:*:*:*:windows:*:*

CVSS Data

CVSS version used by this source: 3.1

7.0HIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.0
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.28%
Probability of exploitation in next 30 days
EPSS Percentile
20.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0028 is in the 56th percentile among its peer group of 17,061 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

microsoftpatch availablevia msrc
Product: 16999-16820Fixed in: 0.103.2-1
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 x64Fixed in: 0.103.2-1
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 ARMFixed in: 0.103.2-1
microsoftpatch availablevia msrc
Product: cm1 clamav 0.103.2-1 on CBL Mariner 1.0Fixed in: 0.103.2-1
ciscovendor investigatingvia nvd_reference
View patch

Vendor Advisories (2)

microsoft2023-Mar/CVE-2021-1386

CVE-2021-1386

Mar 14, 2023
microsoft2021-Apr/CVE-2021-1386Important

Cisco Advanced Malware Protection for Endpoints Windows Connector ClamAV for Windows and Immunet DLL Hijacking Vulnerability

Apr 13, 2021

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-amp-imm-dll-tu79hvkO
Vendor Advisory