Security readout for executives and security teams
Plain-English summary
Teradek Slice 1st generation devices running firmware 7.3.x or earlier have a stored cross-site scripting issue in the Friendly Name setting. A lower-privileged user could plant content that runs when another user views it. The product is end-of-life, and the vendor says no firmware update will address it.
Executive priority
Prioritize remediation for exposed or shared-administration devices. Business urgency is moderate because impact is limited but the product is end-of-life, so risk reduction depends on isolation, access control, or replacement rather than patching.
Technical view
CVE-2021-37373 is CWE-79 XSS in the System Information Settings Friendly Name field on Teradek Slice 1st generation firmware 7.3.x and earlier. CVSS 3.1 is 5.4, requiring network access, low complexity, low privileges, and user interaction, with changed scope and low confidentiality and integrity impact.
Likely exposure
Exposure is most likely where legacy Teradek Slice 1st generation management interfaces remain reachable and users with settings access exist. The source bundle does not identify broader affected CPEs or newer Teradek products.
Exploitation context
The CVE is not in CISA KEV, and the provided sources do not state active exploitation. The scenario requires a privileged-enough actor to modify the Friendly Name and another user to interact with the affected interface.
Researcher notes
Evidence is limited to the CVE record and the referenced advisory. Affected product metadata is incomplete in the provided bundle, so validation should rely on device inventory, firmware confirmation, and vendor documentation rather than assumptions.
Mitigation direction
- Identify and replace or decommission affected end-of-life Slice devices.
- Restrict management interfaces to trusted administrative networks only.
- Limit settings access to trusted administrators.
- Check Teradek guidance for any current support or replacement advice.
- Treat compensating controls as temporary because no firmware fix is expected.
Validation and detection
- Inventory Teradek Slice 1st generation devices in all environments.
- Confirm whether firmware is 7.3.x or earlier.
- Verify management interfaces are not internet-accessible.
- Review who can modify System Information Settings.
- Inspect Friendly Name values for unexpected or suspicious content.
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-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-37373 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
- 5.4 (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: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:R/S:C/C:L/I:L/A:N2.32.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.4MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://tbutler.org/2021/04/29/teradek-vulnerability-advisoryCVE reference
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 Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.