Security readout for executives and security teams
Plain-English summary
CVE-2021-1474 is a Cisco Umbrella issue where exported audit logs or scheduled reports could carry spreadsheet formula or link content. A logged-in attacker could abuse this to affect a person who opens the exported report. Business risk is moderate because exploitation needs access and user interaction.
Executive priority
Prioritize as a controlled remediation item, not an emergency, unless untrusted users have Umbrella admin access or reports are widely opened in spreadsheets.
Technical view
The source bundle describes CWE-1236 formula injection and link injection in Cisco Umbrella Admin audit log export and Scheduled Reports. CVSS 3.1 is 6.5 with network access, low privileges, required user interaction, changed scope, and low confidentiality, integrity, and availability impact.
Likely exposure
Exposure is most likely where Cisco Umbrella Insights Virtual Appliance or Cisco Umbrella reporting workflows are used and authenticated users can influence exported audit logs or scheduled report content.
Exploitation context
The bundle does not show CISA KEV listing or active exploitation. The CVSS vector indicates an authenticated remote attacker and user interaction are required, so risk depends on account access and report-handling practices.
Researcher notes
Evidence is limited to the CVE metadata and Cisco advisory reference. Do not assume broader Cisco products, unauthenticated exploitation, public exploitation, or a specific fix from this bundle alone.
Mitigation direction
- Review Cisco advisory cisco-sa-umbrella-inject-gbZGHP5T for affected and fixed release guidance.
- Restrict access to Umbrella admin audit exports and scheduled reports.
- Treat exported CSV or spreadsheet reports as untrusted until vendor guidance is applied.
- Warn staff not to open unexpected Umbrella report exports from untrusted users.
- Monitor Cisco guidance because this bundle does not name specific fixed versions.
Validation and detection
- Inventory Cisco Umbrella Insights Virtual Appliance and Umbrella reporting usage.
- Confirm whether Admin audit log export or Scheduled Reports are enabled.
- Check Cisco advisory for exact affected deployments and remediation status.
- Review recent report-generation and admin activity for suspicious authenticated use.
- Validate remediation using vendor-approved checks, not live offensive payloads.
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-1236: 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-2021-1474 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 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
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:R/S:C/C:L/I:L/A:L2.33.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
Source materials
- CVE List V5 sourceCVE List V5
- 20210407 Cisco Umbrella Link and CSV Formula Injection 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 Neutralization of Formula Elements in a CSV File
Improper Neutralization of Formula Elements in a CSV File represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.