Security readout for executives and security teams
Plain-English summary
CVE-2020-3474 affects Cisco IOS XE web management. A remote attacker who already has read-only credentials could access sensitive data they should not see. The advisory grouping also mentions possible web management hangs or crashes, but the provided CVSS vector for this CVE records low confidentiality impact and no availability impact.
Executive priority
Treat this as a moderate network-management risk. It is not presented as actively exploited, but management interfaces often protect sensitive operational data, so exposed or broadly accessible devices should be reviewed promptly.
Technical view
The issue is in the Cisco IOS XE web management framework and is classified as CWE-20 input validation. The provided vector is CVSS 3.1 4.3: network exploitable, low complexity, low privileges required, no user interaction, unchanged scope, low confidentiality impact, no integrity or availability impact.
Likely exposure
Exposure is most likely where Cisco IOS XE Software 16.1.1 is used and the web management interface is enabled or reachable by authenticated read-only users. Internet exposure is not stated in the source bundle and should not be assumed.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. The attacker model requires valid low-privilege credentials and remote network access to the web management framework.
Researcher notes
The provided data identifies IOS XE 16.1.1 and CWE-20. The description references multiple web management vulnerabilities, while this CVE vector shows confidentiality impact only. Validate exact affected releases, fixed releases, and any workarounds in the Cisco advisory before scoping remediation.
Mitigation direction
- Review Cisco's advisory for fixed software and official workarounds.
- Upgrade affected IOS XE systems according to Cisco guidance.
- Restrict web management access to trusted management networks only.
- Remove unnecessary read-only administrative accounts.
- Monitor for unusual web management access by low-privilege users.
Validation and detection
- Inventory Cisco IOS XE Software 16.1.1 deployments.
- Confirm whether the web management interface is enabled.
- Check if the interface is reachable outside trusted management paths.
- Audit read-only accounts with access to web management.
- Compare installed software against Cisco's advisory guidance.
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-20: 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-2020-3474 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
- 4.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/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:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N2.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20200924 Cisco IOS XE Software Web Management Framework VulnerabilitiesCVE 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 Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.