Security readout for executives and security teams
Plain-English summary
This flaw lets a logged-in local user on a Mac corrupt files through the Cisco AnyConnect uninstaller. It is not described as remote compromise, but corrupting critical system files could cause denial of service. Cisco released software updates and says there are no workarounds.
Executive priority
Treat this as a managed endpoint patching issue. It is lower urgency than internet-facing remote code execution, but important for Mac fleets where local account misuse could disrupt critical systems.
Technical view
CVE-2020-3432 is a CWE-59 path-handling issue in the Cisco AnyConnect Secure Mobility Client for Mac OS uninstaller. Incorrect directory path handling around symbolic links can allow an authenticated local attacker to corrupt targeted file contents, potentially affecting availability if critical files are hit.
Likely exposure
Exposure is limited to macOS endpoints running the affected Cisco AnyConnect Secure Mobility Client or Cisco Secure Client. The source bundle does not identify specific affected versions, so teams must compare installed versions against Cisco’s advisory and update guidance.
Exploitation context
The CVE is not listed as CISA KEV in the provided bundle, and no cited source states active exploitation. Exploitation requires valid local credentials and user interaction, with local attack vector and possible high availability impact.
Researcher notes
The strongest evidence is Cisco’s advisory and the CVE record. Affected version detail is incomplete in the provided bundle, with versions listed as N/A. Do not assert exploitation in the wild without additional sourced evidence.
Mitigation direction
- Apply Cisco software updates referenced in the advisory.
- Inventory macOS endpoints running Cisco AnyConnect or Cisco Secure Client.
- Prioritize shared Macs, administrator workstations, and systems supporting critical operations.
- Do not rely on workarounds; Cisco states none address this vulnerability.
Validation and detection
- Compare installed client versions against Cisco’s advisory guidance.
- Confirm patched Cisco client versions are deployed across macOS endpoints.
- Review endpoint inventory for unmanaged Macs with Cisco VPN clients.
- If abuse is suspected, check affected systems for unexpected file corruption.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CWE-59: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2020-3432 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.6 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:H/E:X/RL:X/RC:X
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:H/E:X/RL:X/RC:X1.34.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.6MediumVector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:H/E:X/RL:X/RC:X
Source materials
- CVE List V5 sourceCVE List V5
- cisco-sa-anyconnect-mac-dos-36s2y3LvCVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Link Resolution Before File Access ('Link Following')
Improper Link Resolution Before File Access ('Link Following') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.