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CVE Record

CVE-2021-1216: 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

Authenticated administrators, or attackers who obtain administrator credentials, could compromise certain Cisco Small Business RV routers through the web management interface. Successful exploitation can run code as root or restart the router, causing outage. Cisco stated it had not released software updates for these vulnerabilities.

Executive priority

Treat this as a high-priority lifecycle and exposure issue for affected branch or small-office routers. The attacker needs admin credentials, but the outcome can be full device compromise or outage, and Cisco reported no software updates.

Technical view

CVE-2021-1216 covers improper validation of user-supplied input in the web-based management interface of Cisco RV110W, RV130, RV130W, and RV215W routers. Crafted HTTP requests from an authenticated remote administrator can trigger arbitrary code execution as root or denial of service. CVSS 3.1 is 7.2, PR:H.

Likely exposure

Exposure is most likely where affected RV-series routers remain deployed and their management interface is reachable by users with administrator credentials. Risk depends heavily on admin account security and management-plane reachability.

Exploitation context

The provided sources do not show known active exploitation, and the CVE is not marked KEV. Exploitation requires valid administrator credentials and crafted HTTP requests to the management interface.

Researcher notes

Evidence is limited to the CVE record and Cisco advisory metadata in the provided bundle. Do not claim unauthenticated access, public exploitation, or fixed versions from these sources. The core exposure condition is authenticated access to the web management interface.

Mitigation direction

  • Check Cisco advisory for current vendor guidance and lifecycle status.
  • Inventory RV110W, RV130, RV130W, and RV215W routers in production.
  • Do not assume a software update exists for this CVE.
  • Restrict management access to trusted administrative paths as a compensating control.
  • Review and protect administrator credentials on affected devices.
  • Plan replacement or retirement if vendor guidance offers no update path.

Validation and detection

  • Confirm model numbers and firmware families for all small business routers.
  • Identify whether web-based management is reachable from untrusted networks.
  • Review administrative account inventory and recent management logins.
  • Check change records for unexpected router reloads or configuration changes.
  • Track Cisco advisory status before closing remediation work.
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

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ATT&CK lookup starting points

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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-2021-1216 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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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-2021-1216Attack 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.