Security readout for executives and security teams
Plain-English summary
This flaw lets a logged-in local user on affected Cisco IOS XE devices break out of the IOx application-hosting container and run commands as root. It is not described as remotely exploitable or unauthenticated, but compromise could expose device confidentiality and integrity.
Executive priority
Treat as a targeted insider or credential-misuse risk for Cisco network infrastructure. Prioritize validation on devices with delegated app-hosting administration or shared operational accounts, then follow Cisco remediation guidance.
Technical view
Cisco describes incomplete CLI payload validation and improper RBAC inside the IOS XE application-hosting subsystem. A crafted CLI input from an authenticated local user could execute IOS XE and underlying Linux commands outside the Docker container with root privileges. CVSS v3.1 score is 6.0.
Likely exposure
Exposure is likely limited to Cisco IOS XE environments where users can access the IOx application-hosting command line. The source bundle does not identify exact affected versions or configurations beyond Cisco IOS XE Software.
Exploitation context
The bundle does not show CISA KEV listing or cited active exploitation. Exploitation requires valid user credentials and local command-line access, with the CVSS vector marking high privileges required.
Researcher notes
Evidence is strong for vulnerability mechanics, impact, and access requirements. Evidence is incomplete for exact affected versions, fixed releases, and exploitation in the wild because those details are not present in the supplied bundle.
Mitigation direction
- Review Cisco advisory for affected releases and fixed software guidance.
- Upgrade or remediate only according to Cisco-published instructions.
- Restrict local accounts with IOS XE application-hosting CLI access.
- Review RBAC assignments for users allowed to manage IOx application hosting.
- Monitor privileged IOS XE and underlying Linux command activity.
Validation and detection
- Inventory Cisco IOS XE devices that use IOx application hosting.
- Compare device releases against Cisco advisory affected-release guidance.
- Review local user roles with application-hosting subsystem access.
- Check logs for unexpected privileged command execution from app-hosting contexts.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-269: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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 lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupContainer behavior lookup
The affected technology mentions containers, so container-specific ATT&CK technique review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2020-3393 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
- 6 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
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:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N0.85.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6MediumVector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20200924 Cisco IOS XE Software IOx Application Hosting Privilege Escalation VulnerabilityCVE reference · vendor-advisory, x_refsource_CISCO
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 Privilege Management
Improper Privilege Management represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.