Home/CVE/Improper Link Resolution Before File Access ('Link Following') vulnerability in the EPAG component of Bitdefender Endpoi
CVE

CVE-2021-3641

Improper Link Resolution Before File Access ('Link Following') vulnerability in the EPAG component of Bitdefender Endpoi

Improper Link Resolution Before File Access ('Link Following') vulnerability in the EPAG component of Bitdefender Endpoint Security Tools for Windows allows a local attacker to cause a denial of service. This issue affects: Bitdefender GravityZone version 7.1.2.33 and prior versions.

MEDIUM · CVSS 6.1 EPSS 0.00041
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules7 YARA rules0
⬡

Weakness Classification

CWE-59Improper Link Resolution Before File Access ('Link Following')
CWE-59Improper Link Resolution Before File Access ('Link Following')
▤

Affected Products & Versions

1
bitdefender gravityzone<= 7.1.2.33
◈

Sigma Hunt Rules

7
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productcriticalHackTool - Windows Credential Editor (WCE) Execution
productcriticalWindows Credential Editor Registry
producthighOpenCanary - MSSQL Login Attempt Via Windows Authentication
producthighWindows LAPS Credential Dump From Entra ID
producthighTamper Windows Defender - PSClassic
producthighTamper Windows Defender Remove-MpPreference - ScriptBlockLogging
▣

Scoring & Timeline

6.1
MEDIUM · CVSS v3.1 · cve-requests@bitdefender.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD09 Nov 2021 · 02:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
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References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.bitdefender.com/support/security-advisories/improper-link-resolution-before-file-access-in-bitdefender-gravityzone-va-9921Broken LinkVendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-22-143/Third Party AdvisoryVDB Entry
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