Security readout for executives and security teams
Plain-English summary
This CVE affects Cisco Small Business RV110W, RV130, RV130W, and RV215W routers. An unauthenticated remote attacker could take over an affected router through its web management interface and run code as root. Cisco has not released software updates for this vulnerability in the supplied advisory data.
Executive priority
Treat this as urgent for any exposed affected router. The business risk is full device compromise, traffic interception, service disruption, and foothold creation. Prioritize finding these devices and removing management exposure while deciding whether replacement is required.
Technical view
The issue is improper validation of user-supplied input in the web-based management interface. The CVE is rated CVSS 3.1 9.8 critical, network exploitable, low complexity, no privileges, no user interaction, with full confidentiality, integrity, and availability impact. The assigned weakness is CWE-119.
Likely exposure
Exposure is most likely where affected Cisco Small Business RV110W, RV130, RV130W, or RV215W routers have reachable web management interfaces, especially from untrusted networks. The source bundle does not provide affected firmware version ranges beyond the product family firmware entry.
Exploitation context
The supplied evidence does not show CISA KEV listing or active exploitation. It does state unauthenticated remote code execution is possible through crafted HTTP requests. That combination makes internet-exposed management interfaces a serious takeover risk even without confirmed exploitation evidence.
Researcher notes
Do not assume a patch exists from the supplied sources. Cisco’s CVE description says no software updates were released. Validation should focus on asset identification, management-plane exposure, support status, and whether vendor guidance has changed since the referenced advisory.
Mitigation direction
- Check Cisco’s advisory for official guidance and product-specific status.
- Inventory affected router models across offices, branches, and remote sites.
- Remove untrusted network access to web management interfaces.
- Plan replacement or retirement where Cisco provides no software update.
- Monitor vendor and threat-intelligence sources for exploitation updates.
Validation and detection
- Confirm whether RV110W, RV130, RV130W, or RV215W devices are deployed.
- Identify any reachable web-based management interfaces for those routers.
- Review external attack-surface records for exposed router administration pages.
- Document firmware and support status for each affected device.
- Track whether Cisco later publishes updated remediation guidance.
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-2021-1459 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 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20210407 Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote Command 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.