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CVE Record

CVE-2021-1199: 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

This flaw affects the management interface on specific Cisco Small Business RV routers. An attacker with valid administrator credentials could take control of the device at root level or crash it. Cisco reported no software updates for these vulnerabilities, so exposed devices need risk review and vendor-guided handling.

Executive priority

Treat as a high-priority network edge risk where these routers remain deployed. The need for admin credentials lowers likelihood, but root execution and no cited vendor patch raise business impact.

Technical view

CVE-2021-1199 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 trigger arbitrary code execution as root or device reload. CVSS v3.1 is 7.2 with high confidentiality, integrity, and availability impact.

Likely exposure

Exposure is limited to listed Cisco Small Business RV router models, especially where the web management interface is reachable over a network and administrator credentials could be misused or compromised.

Exploitation context

The sources require valid administrator credentials. KEV is false, and the provided sources do not establish active exploitation. The issue is still serious because successful exploitation can result in root-level control or denial of service.

Researcher notes

Evidence supports authenticated remote RCE and DoS through crafted HTTP requests against the management interface. The bundle names CWE-121 and CVSS AV:N/AC:L/PR:H/UI:N. It does not provide patch details, exploit maturity, or safe proof-of-concept validation methods.

Mitigation direction

  • Review Cisco’s advisory for current vendor guidance before deciding treatment.
  • Identify and prioritize affected RV110W, RV130, RV130W, and RV215W devices.
  • Restrict management interface access to trusted administrative paths only.
  • Audit administrator accounts and remove unused or shared credentials.
  • Plan replacement or compensating controls where no vendor update is available.

Validation and detection

  • Inventory network devices for the named Cisco Small Business RV models.
  • Confirm whether each device exposes the web-based management interface.
  • Verify administrator account ownership and credential hygiene.
  • Check whether any affected device has unexpected reloads or configuration changes.
  • Document that Cisco reported no software updates in the cited advisory.
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

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

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.

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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.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2021-1199 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-2021-1199Attack 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.