Security readout for executives and security teams
Plain-English summary
Cisco SD-WAN vManage had a high-severity flaw that could let a logged-in remote attacker abuse file uploads to read or change sensitive files on the system. This matters because vManage is a central SD-WAN management component, so compromise could affect confidentiality, integrity, and availability of management operations.
Executive priority
Treat this as a high-priority infrastructure management issue where vManage is deployed. It requires authentication, which lowers opportunistic risk, but arbitrary file read/write against a management platform creates serious business impact if an account is compromised or misused.
Technical view
CVE-2020-3381 is a CWE-22 directory traversal issue in the Cisco SD-WAN vManage web management interface. The source attributes it to insufficient validation of uploaded files. Exploitation requires authentication and could allow arbitrary file read or modification. CVSS v3.0 is 8.8 with network access, low complexity, low privileges, and no user interaction.
Likely exposure
Exposure is most relevant to organizations running Cisco SD-WAN vManage with users able to access the web management interface. The provided source bundle does not identify affected release numbers, so teams must verify their versions against Cisco’s advisory before assuming impact or safety.
Exploitation context
The bundle does not show CISA KEV listing or evidence of active exploitation. Cisco’s description says an authenticated remote attacker could exploit the flaw by uploading a crafted file, but the provided sources do not establish public exploit use in the wild.
Researcher notes
The source bundle lacks affected version and fixed-release detail. Analysis should stay anchored to Cisco’s advisory and CVE data. Avoid claiming unauthenticated access or active exploitation; the available evidence supports authenticated remote exploitation through insufficient upload validation only.
Mitigation direction
- Check Cisco’s advisory for affected releases and remediation guidance.
- Prioritize vendor-recommended updates for confirmed affected vManage systems.
- Restrict vManage web management access to trusted administrative paths.
- Review privileged and low-privileged accounts with vManage access.
- Monitor Cisco guidance for any later workaround or fixed-release details.
Validation and detection
- Inventory all Cisco SD-WAN vManage deployments and versions.
- Compare installed versions against Cisco’s advisory.
- Confirm who can authenticate to the web management interface.
- Review vManage logs for unusual authenticated file upload activity.
- Document whether each instance is affected, remediated, or awaiting vendor confirmation.
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-22: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. 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 lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2020-3381 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
- High
- CVSS
- 8.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.8HighVector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20200715 Cisco SD-WAN vManage Software Directory Traversal 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 Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.