Security readout for executives and security teams
Plain-English summary
This vulnerability affects Cisco Small Business RV110W, RV130, RV130W, and RV215W routers. An attacker with valid administrator credentials could abuse the web management interface to run code as root or force a restart. Cisco says it has not released software updates for these vulnerabilities.
Executive priority
Treat this as a high-priority legacy edge-device risk. The issue is serious because compromise can affect routing infrastructure, but the provided evidence requires administrator credentials and does not show active exploitation. Prioritize inventory, isolation, credential review, and replacement planning where no vendor update exists.
Technical view
Cisco reports improper validation of user-supplied input in the routers' web-based management interface. Authenticated remote attackers with administrator credentials can send crafted HTTP requests that may trigger arbitrary code execution as root or denial of service. The CVSS v3.1 score is 7.2 High, with high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to organizations still operating the named Cisco Small Business RV routers. Risk rises when the management interface is reachable from untrusted networks or administrator credentials are weak, reused, or compromised. The source bundle does not identify other affected products or versions beyond the listed router families.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation evidence. Exploitation requires valid administrator credentials on the affected device. Successful abuse could give root-level code execution on the router or cause a reload, disrupting network availability.
Researcher notes
The CVSS vector is AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. CWE-121 is listed. The key research boundary is authenticated management-interface access; do not assume pre-auth exploitation or broader product impact from the supplied evidence.
Mitigation direction
- Check Cisco's advisory for current vendor guidance and lifecycle status.
- Inventory RV110W, RV130, RV130W, and RV215W devices in use.
- Restrict management-interface access to trusted administrative networks only.
- Review and rotate router administrator credentials where exposure is possible.
- Plan replacement if affected routers cannot be updated or acceptably isolated.
Validation and detection
- Confirm whether any listed RV router models remain deployed.
- Verify management interfaces are not reachable from untrusted networks.
- Review administrator account lists for stale, shared, or weak accounts.
- Check device logs for unexpected administrative access or reloads.
- Document compensating controls for any device that remains in service.
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-121: 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-2021-1170 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 Remote Command Execution and Denial of Service 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.
Stack-based Buffer Overflow
Stack-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.