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CVE Record

CVE-2021-1153: Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Stored Cross-Site Scripting 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 conduct cross-site scripting (XSS) attacks against a user of the interface. The vulnerabilities are due to insufficient input validation by 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 script code in the context of the affected interface or access sensitive, browser-based information. To exploit these vulnerabilities, an attacker would need to have valid administrator credentials on the affected device.

MediumCVSS 4.8Not KEV-listedUpdated
Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This CVE affects the management interface of several Cisco Small Business RV routers. An attacker with valid administrator credentials could store script content that runs in another interface user’s browser, potentially exposing browser-based information or changing what that user sees.

Executive priority

Treat this as a moderate-priority network hygiene issue. It is not described as remotely exploitable without credentials, but affected edge devices should be updated, restricted, or retired because router administration compromise can support broader intrusion paths.

Technical view

CVE-2021-1153 is a stored XSS issue caused by insufficient input validation in Cisco RV110W, RV130, RV130W, and RV215W web management interfaces. Exploitation requires authenticated administrator access and user interaction. Impact is limited confidentiality and integrity compromise in the browser context; availability is not affected.

Likely exposure

Organizations still operating the listed Cisco Small Business RV router models are the primary exposure. Risk is highest where administrative access is broadly shared, remotely reachable, or weakly monitored.

Exploitation context

The source bundle does not show CISA KEV listing or other evidence of active exploitation. The attacker must already have valid administrator credentials and must cause a management-interface user to interact with affected content.

Researcher notes

The CVSS 3.1 score is 4.8 with PR:H and UI:R, matching an authenticated stored XSS path. The provided sources do not include fixed version details, proof of exploitation, or workaround specifics beyond referring to Cisco guidance.

Mitigation direction

  • Check Cisco’s advisory for fixed firmware or model-specific guidance.
  • Restrict router management access to trusted administrative networks.
  • Review and reduce administrator accounts on affected routers.
  • Retire unsupported affected models if no vendor-supported update is available.

Validation and detection

  • Inventory Cisco RV110W, RV130, RV130W, and RV215W devices.
  • Confirm firmware status against Cisco’s advisory.
  • Verify management interfaces are not exposed to untrusted networks.
  • Review admin access logs for unexpected management activity.
Prepared
Confidence
medium
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 · medium confidence lookup

CWE-79: User-session and phishing behavior lookup

Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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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cve · low confidence lookup

CVE-2021-1153 mapping review

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Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Medium
CVSS
4.8 (3.1)
Known Exploited
No
Published

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

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
4.8CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N1.72.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

4.8Medium
CVSS 3.1 vector shape for CVE-2021-1153Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

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-79 · source CWE mapping

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.