Security readout for executives and security teams
Plain-English summary
Certain Cisco Small Business RV routers have management-interface flaws that can let a logged-in administrator run code as root or crash the device. The issue is serious for exposed or shared-admin environments. Cisco says it has not released software updates for these vulnerabilities.
Executive priority
Treat this as high priority for any remaining affected routers. The need for admin credentials lowers broad internet risk, but root-level execution and denial of service on edge networking equipment can create business disruption after credential compromise.
Technical view
CVE-2021-1213 covers multiple improper input-validation vulnerabilities in the web-based management interface of Cisco RV110W, RV130, RV130W, and RV215W routers. An authenticated remote attacker with valid administrator credentials could send crafted HTTP requests to achieve root-level code execution or trigger device reloads causing denial of service.
Likely exposure
Exposure is limited to organizations still operating the named Cisco Small Business RV models, especially where the web management interface is reachable by remote administrators. The attacker needs valid administrator credentials, reducing opportunistic risk but increasing impact after credential compromise.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. Exploitation requires authenticated administrator access and crafted HTTP requests to the management interface. Successful exploitation can affect confidentiality, integrity, and availability because code may run as root or the router may reload.
Researcher notes
Key constraints are authenticated remote access, high privileges required, and no named Cisco software update in the provided advisory data. Validate exposure through asset inventory and management-plane reachability rather than assuming every Cisco RV device is affected.
Mitigation direction
- Review Cisco advisory guidance for current vendor recommendations.
- Identify and prioritize replacement of affected routers where still deployed.
- Restrict management interface access to trusted administrative networks only.
- Limit, rotate, and audit administrator credentials on affected devices.
- Monitor affected routers for unexpected reloads or unauthorized admin activity.
Validation and detection
- Inventory for Cisco RV110W, RV130, RV130W, and RV215W routers.
- Confirm whether web-based management is reachable remotely.
- Verify who has valid administrator credentials for each affected device.
- Check device logs for unexpected reloads or suspicious admin sessions.
- Document compensating controls if replacement is not immediate.
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
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CWE-121: Exact CWE lookup
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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-2021-1213 mapping review
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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.