Security readout for executives and security teams
Plain-English summary
Cisco reports that several Small Business RV routers have management-interface flaws that can let an authenticated administrator-level attacker run code as root. The issue is high impact, but it requires valid administrator credentials. Cisco stated it had not released software updates for these vulnerabilities.
Executive priority
Treat this as high priority where affected routers remain in service. Business risk is strongest if administrative credentials are weak, shared, exposed, or if management interfaces are reachable from broader networks. No Cisco patch is cited in the provided sources.
Technical view
CVE-2021-1147 covers command injection in the web-based management interface of Cisco RV110W, RV130, RV130W, and RV215W routers. Improper input validation allows crafted HTTP requests by an authenticated remote administrator to execute arbitrary commands with root privileges. CVSS v3.1 is 7.2, high severity.
Likely exposure
Exposure is limited to listed Cisco Small Business RV router models with accessible web management interfaces and valid administrator credentials available to an attacker. The source bundle does not identify affected firmware versions beyond the product family entry.
Exploitation context
The source states exploitation requires valid administrator credentials and crafted HTTP requests to the management interface. The CVE is not listed as KEV in the bundle, and no provided source confirms active exploitation.
Researcher notes
Evidence supports authenticated remote command injection with root-level impact and CWE-20 improper input validation. The bundle does not include exploit proof, affected firmware granularity, confirmed exploitation, or vendor-provided patches. Avoid unauthenticated exposure claims.
Mitigation direction
- Check Cisco’s advisory for current remediation or lifecycle guidance.
- Do not assume a patch exists; Cisco stated no addressing updates were released.
- Inventory RV110W, RV130, RV130W, and RV215W routers.
- Review administrator account control and credential exposure.
- Limit management-interface exposure according to vendor guidance and internal policy.
Validation and detection
- Confirm whether any listed RV router models are deployed.
- Verify whether web management interfaces are reachable from untrusted networks.
- Review admin account inventory and recent administrative access logs.
- Compare deployed devices against Cisco’s advisory and CVE record.
- Document lack of cited software update in remediation tracking.
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-20: 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.
Open ATT&CK lookupExecution 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.
Open ATT&CK lookupCVE-2021-1147 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
- 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
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:N/S:U/C:H/I:H/A:H1.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.2HighVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20210113 Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Command Injection 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 Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.