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CVE Record

CVE-2021-1185: 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 affects older Cisco Small Business RV110W, RV130, RV130W, and RV215W routers. A logged-in administrator, or someone with stolen admin credentials, could abuse the web management interface to run commands as root or crash the device. Cisco did not release software updates for these vulnerabilities.

Executive priority

Treat as high priority where these routers remain deployed, especially if management access is exposed beyond a tightly controlled admin network. The lack of Cisco software updates shifts remediation toward access restriction, credential control, and device replacement planning.

Technical view

The issue is improper validation of user input in the web-based management interface, mapped to CWE-121. Cisco describes authenticated remote command execution and denial of service via crafted HTTP requests. CVSS 3.1 is 7.2 high: network reachable, low complexity, high privileges required, no user interaction, high confidentiality, integrity, and availability impact.

Likely exposure

Exposure is limited to Cisco Small Business RV110W, RV130, RV130W, and RV215W routers with accessible web-based management. The attacker must have valid administrator credentials, so credential theft, shared admin accounts, or exposed management portals materially increase risk.

Exploitation context

The provided sources do not show active exploitation, and the CVE is not marked KEV. Exploitation requires authenticated administrator access and crafted HTTP requests to the management interface. The impact is serious because successful exploitation can run code as root or force a device reload.

Researcher notes

Evidence supports authenticated remote RCE and DoS through management-interface input validation flaws. Do not assume unauthenticated exploitation from the supplied sources. The source bundle does not provide a patch, workaround details, proof of exploitation, or product-specific firmware version ranges.

Mitigation direction

  • Check Cisco advisory and support channels for current vendor guidance.
  • Restrict web management access to trusted administrator networks only.
  • Audit administrator accounts and rotate weak or shared credentials.
  • Replace or retire affected devices where no vendor update exists.

Validation and detection

  • Inventory Cisco RV110W, RV130, RV130W, and RV215W routers.
  • Confirm whether web-based management is reachable from untrusted networks.
  • Review admin account usage, credential age, and unexpected logins.
  • Verify whether any affected device remains in production without compensating controls.
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.

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cve · low confidence lookup

CVE-2021-1185 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-2021-1185Attack 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.