Security readout for executives and security teams
Plain-English summary
CVE-2020-3401 lets a logged-in remote user read sensitive files from Cisco SD-WAN vManage through the web management interface. It is not described as unauthenticated or code execution, but the confidentiality impact is high because arbitrary file reads on a management system can expose secrets or operational data.
Executive priority
Treat as a near-term management-plane confidentiality risk. It is medium CVSS and authenticated, but vManage is a high-value SD-WAN control system, so exposed or broadly accessible instances should be prioritized for vendor-guided remediation.
Technical view
The issue is a CWE-22 path traversal flaw caused by insufficient HTTP request validation in Cisco SD-WAN vManage. A low-privileged authenticated attacker can submit crafted web requests containing traversal sequences and gain read access to arbitrary files. CVSS is 6.5: network reachable, low complexity, privileges required, no integrity or availability impact listed.
Likely exposure
Exposure applies to Cisco SD-WAN vManage deployments with the web-based management interface accessible to authenticated users. Risk increases where vManage is reachable from broad corporate networks, partner networks, or the internet. The provided bundle does not identify affected version ranges or fixed releases.
Exploitation context
The bundle does not cite active exploitation, and KEV status is false. Exploitation requires authentication, but a compromised or low-privileged account could still use the flaw to read sensitive local files from the vManage appliance.
Researcher notes
Evidence supports authenticated path traversal and arbitrary file read only. The bundle does not provide affected version ranges, fixed versions, proof-of-concept details, or exploitation telemetry. Avoid assuming internet-wide exploitation from the provided sources.
Mitigation direction
- Check Cisco advisory cisco-sa-vmandowndir-CVGvdKM3 for affected and fixed releases.
- Upgrade or apply Cisco-provided remediation when confirmed applicable.
- Restrict vManage web access to trusted administrative networks or VPN users.
- Enforce least-privilege accounts and strong authentication for vManage administrators.
- Monitor vManage web logs for traversal-pattern requests and unusual file access attempts.
Validation and detection
- Inventory all Cisco SD-WAN vManage instances and management-interface exposure.
- Confirm installed versions against Cisco’s advisory and internal asset records.
- Review whether non-admin users can authenticate to vManage.
- Check access logs for suspicious traversal-pattern requests without replaying them.
- Verify remediation status after upgrade or vendor-directed mitigation.
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-2020-3401 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
- 6.5 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N2.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
6.5MediumVector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20200715 Cisco SD-WAN vManage Software Path 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.