Security readout for executives and security teams
Plain-English summary
This flaw affects Cisco Small Business RV110W, RV130, RV130W, and RV215W routers. An attacker with valid administrator credentials could use the web management interface to run code as root or crash the router. Cisco reported no software updates for the issue, so exposure reduction and lifecycle decisions matter.
Executive priority
Treat this as a high-priority legacy-router risk, especially for externally reachable management interfaces. The business issue is not just exploitation complexity; it is root-level impact combined with no Cisco software update named in the source bundle.
Technical view
CVE-2021-1307 is a network-reachable management-interface input-validation issue, mapped to CWE-121, with CVSS 3.1 score 7.2. Exploitation requires high privileges: valid administrator credentials. Successful exploitation may allow arbitrary root-level code execution on the router operating system or trigger reload-based denial of service.
Likely exposure
Exposure is limited to organizations running the listed Cisco Small Business router models with accessible web-based management interfaces. Risk is higher where admin credentials are shared, weak, reused, or where management is reachable from untrusted networks.
Exploitation context
The provided sources do not show CISA KEV inclusion or confirm active exploitation. Exploitation requires authenticated administrator access and crafted HTTP requests to the management interface. No exploit steps should be inferred from the public summary.
Researcher notes
The key constraint is PR:H, so validation should focus on exposed management surfaces and administrator credential paths. The source bundle supports root code execution and DoS impact, but does not provide evidence of exploitation in the wild or a vendor patch.
Mitigation direction
- Review Cisco advisory guidance for the affected router models.
- Verify whether any affected devices remain in production.
- Restrict web management access to trusted administrative networks only.
- Harden and rotate administrator credentials on affected devices.
- Plan replacement or retirement where no fixed firmware is available.
Validation and detection
- Inventory RV110W, RV130, RV130W, and RV215W routers.
- Confirm firmware and management-interface exposure for each device.
- Review admin account lists and credential governance.
- Check logs for unexpected management access or router reloads.
- Document compensating controls and replacement timelines.
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-2021-1307 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.
