Security readout for executives and security teams
Plain-English summary
This CVE affects Cisco small-business RV110W and RV215W routers. An unauthenticated remote attacker could send crafted requests to the web management interface and run code as root. For an exposed router, that means possible full device takeover, traffic interception, configuration changes, or service disruption.
Executive priority
Treat exposed devices as urgent. The vulnerability requires no credentials and can lead to root-level control of edge network equipment, creating business risk beyond the router itself.
Technical view
Cisco describes improper validation of user-supplied input in the web-based management interface, mapped to CWE-119. The CVSS 3.0 score is 9.8: network attack vector, low complexity, no privileges, no user interaction, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is most relevant where Cisco RV110W or RV215W management interfaces are reachable from untrusted networks. The source bundle does not provide affected firmware ranges beyond naming the affected products, so asset and firmware confirmation is required.
Exploitation context
The sources support unauthenticated remote arbitrary code execution as root via crafted web requests. The bundle does not include CISA KEV status or other evidence of active exploitation, so active exploitation should not be assumed from these sources alone.
Researcher notes
Evidence is strong for impact and attack preconditions, but incomplete for exact affected firmware ranges, exploit availability, and remediation details. Avoid validation methods that send crafted exploit requests to production routers.
Mitigation direction
- Review Cisco’s advisory for fixed firmware, product status, or official mitigations.
- Remove public access to the web-based management interface.
- Restrict management access to trusted administrative networks or VPN only.
- Prioritize replacement or isolation if no vendor-supported update is available.
Validation and detection
- Inventory environments for Cisco RV110W and RV215W devices.
- Confirm whether management interfaces are reachable from untrusted networks.
- Compare installed firmware and product status against Cisco’s advisory.
- Review device and perimeter logs for unusual management-interface requests.
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-119: 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-2020-3331 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
- Critical
- CVSS
- 9.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
9.8CriticalVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20200715 Cisco RV110W and RV215W Series Routers Arbitrary Code Execution VulnerabilityCVE 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 Restriction of Operations within the Bounds of a Memory Buffer
Improper Restriction of Operations within the Bounds of a Memory Buffer represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.