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.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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-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 lookupCVE-2021-1153 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- 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
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.
CVSS vector scores
1 official scoreWe 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.
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N1.72.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.8MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20210113 Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Stored Cross-Site Scripting VulnerabilitiesCVE reference · vendor-advisory, x_refsource_CISCO
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
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.
