Security readout for executives and security teams
Plain-English summary
These Cisco small business routers have management-interface flaws that could let a logged-in administrator-level attacker take full control or crash the device. The issue is serious because successful code execution runs as root, but exploitation requires valid administrator credentials.
Executive priority
Treat as high priority if these routers remain in production. The business risk is full device compromise or outage after admin credential compromise, and the provided Cisco source says no software updates address the issue.
Technical view
CVE-2021-1214 covers improper input validation in the web-based management interface of Cisco RV110W, RV130, RV130W, and RV215W routers. Crafted HTTP requests from an authenticated remote administrator can cause root-level arbitrary code execution or device reload, creating denial of service. Cisco states no software updates address these vulnerabilities.
Likely exposure
Exposure is limited to organizations using the named Cisco Small Business RV models, especially where the web management interface is reachable by administrators over a network. The source bundle does not provide affected firmware version ranges.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. Exploitation requires valid administrator credentials and network access to the web-based management interface. Successful exploitation could affect confidentiality, integrity, and availability.
Researcher notes
The key constraint is privilege: PR:H in CVSS and Cisco’s description require valid administrator credentials. Evidence is incomplete for exact affected firmware versions, available workarounds, or observed exploitation in the provided bundle.
Mitigation direction
- Check Cisco’s advisory for current vendor guidance before making changes.
- Restrict router web management access to trusted management networks only.
- Audit and protect administrator credentials for affected routers.
- Plan isolation or replacement where affected routers cannot be remediated.
- Monitor for unexpected router reloads or suspicious admin activity.
Validation and detection
- Inventory Cisco RV110W, RV130, RV130W, and RV215W routers.
- Confirm whether web-based management is enabled and reachable.
- Verify administrator accounts are authorized, unique, and still needed.
- Review device logs for unexpected reloads or unusual admin sessions.
- Document firmware and model evidence for remediation tracking.
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-121: 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 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-2021-1214 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
- High
- CVSS
- 7.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
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:H/UI:N/S:U/C:H/I:H/A:H1.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.2HighVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20210113 Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote Command Execution and Denial of Service 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.
Stack-based Buffer Overflow
Stack-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
