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CVE Record

CVE-2021-1214: Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote Command Execution and Denial of Service Vulnerabilities

Multiple vulnerabilities in the web-based management interface of Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers could allow an authenticated, remote attacker to execute arbitrary code or cause an affected device to restart unexpectedly. The vulnerabilities are due to improper validation of user-supplied input in the web-based management interface. An attacker could exploit these vulnerabilities by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to execute arbitrary code as the root user on the underlying operating system or cause the device to reload, resulting in a denial of service (DoS) condition. To exploit these vulnerabilities, an attacker would need to have valid administrator credentials on the affected device. Cisco has not released software updates that address these vulnerabilities.

HighCVSS 7.2Not KEV-listedUpdated
Glexia's TakeAutomated analysishigh

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.
Prepared
Confidence
high
Sources
3

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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 · low confidence lookup

CWE-121: Exact CWE lookup

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description · low confidence lookup

Execution 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.

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cve · low confidence lookup

CVE-2021-1214 mapping review

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Vulnerability profileCVE Program record
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

Official CVE source material

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.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We 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.

ScoreVersionSeverityVectorExploitImpactSource
7.2CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H1.25.9Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

7.2High
CVSS 3.1 vector shape for CVE-2021-1214Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone
Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
CiscoCisco Small Business RV Series Router Firmwaren/aListed
Weakness

CWE details

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-121 · source CWE mapping

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.