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CVE Record

CVE-2021-1152: 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

CVE-2021-1152 affects the web 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 altering actions within the management UI.

Executive priority

Treat this as a targeted management-plane risk, not an internet-scale emergency. Prioritize asset discovery, administrative access control, and vendor-guidance review, especially for legacy small-business routers still supporting sensitive network segments.

Technical view

The issue is stored cross-site scripting caused by insufficient input validation in the web-based management interface. Exploitation requires network access, valid administrator credentials, and user interaction. Impact is limited confidentiality and integrity compromise in the interface context, with no availability impact identified in the provided CVSS data.

Likely exposure

Exposure is most likely where Cisco RV110W, RV130, RV130W, or RV215W routers are still deployed and their management interfaces are reachable by administrators or remote management paths.

Exploitation context

The provided sources do not indicate active exploitation, and the CVE is not marked KEV. The high privilege requirement materially limits opportunistic risk, but compromise of router administrator credentials would make the issue more relevant.

Researcher notes

Key constraints are PR:H and UI:R. Validate exposure through asset and firmware review rather than payload testing. The source bundle does not provide detailed fixed-version information, so remediation conclusions should be tied directly to Cisco’s advisory.

Mitigation direction

  • Review Cisco’s advisory for affected releases and vendor remediation guidance.
  • Inventory RV110W, RV130, RV130W, and RV215W devices in use.
  • Limit management interface access to trusted administrative networks where feasible.
  • Review and rotate router administrator credentials if compromise is suspected.
  • Monitor vendor guidance before making firmware or lifecycle decisions.

Validation and detection

  • Confirm whether affected Cisco RV router models are deployed.
  • Identify reachable web-based management interfaces for those devices.
  • Verify who has valid administrator access to each device.
  • Check Cisco advisory status against deployed firmware versions.
  • Review logs or change records for unexpected administrator 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

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

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.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2021-1152 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
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-2021-1152Attack 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.