Security readout for executives and security teams
Plain-English summary
CVE-2021-45906 is a cross-site scripting issue reported in OpenWrt 21.02.1 on the NAT Rules Name screen. If triggered, it could run unwanted script in an administrator’s browser. The public record provides very limited detail, so urgency depends on whether exposed systems run this version and who can access the management interface.
Executive priority
Prioritize discovery and management-interface restriction. Business urgency is moderate only if OpenWrt 21.02.1 administration is exposed to untrusted users; otherwise handle through routine vulnerability management once vendor remediation is confirmed.
Technical view
The CVE describes XSS in OpenWrt 21.02.1 through the NAT Rules Name screen. The source bundle does not specify whether the issue is stored or reflected, required privileges, affected UI component details, CVSS, CWE, or a fixed release. Treat it as an administrative-interface input handling flaw until vendor guidance confirms scope.
Likely exposure
Likely limited to OpenWrt 21.02.1 deployments where the NAT Rules Name screen is reachable by administrators or other permitted users. Exposure is higher if the OpenWrt management interface is reachable from untrusted networks.
Exploitation context
The provided sources do not show active exploitation, public exploit availability, or CISA KEV listing. The CVE is not marked KEV in the supplied bundle. Do not assume exploitation in the wild from this record alone.
Researcher notes
Evidence is sparse: the record names OpenWrt 21.02.1 and the NAT Rules Name screen but omits CVSS, CWE, exploit preconditions, and remediation. Validation should focus on version confirmation, UI access boundaries, and vendor bug status rather than exploit reproduction.
Mitigation direction
- Check OpenWrt guidance for a fixed release or vendor workaround.
- Restrict OpenWrt administration interfaces to trusted management networks.
- Remove untrusted access to firewall or NAT rule administration.
- Review NAT rule names for unexpected or suspicious content.
- Plan upgrade only after confirming vendor-supported target versions.
Validation and detection
- Inventory OpenWrt devices and identify any running version 21.02.1.
- Confirm whether NAT Rules administration is exposed beyond trusted users.
- Review OpenWrt bug task 4199 for vendor status and remediation notes.
- Check change management records for firewall or NAT rule name modifications.
- Verify management interface access controls and administrative account scope.
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.
CVE-2021-45906 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://bugs.openwrt.org/index.php?do=details&task_id=4199CVE reference · x_refsource_MISC
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.