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.
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-2021-1152 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.
