Security readout for executives and security teams
Plain-English summary
This flaw affects the management interface on specific Cisco Small Business RV routers. An attacker with valid administrator credentials could take control of the device at root level or crash it. Cisco reported no software updates for these vulnerabilities, so exposed devices need risk review and vendor-guided handling.
Executive priority
Treat as a high-priority network edge risk where these routers remain deployed. The need for admin credentials lowers likelihood, but root execution and no cited vendor patch raise business impact.
Technical view
CVE-2021-1199 covers improper input validation in the web-based management interface of Cisco RV110W, RV130, RV130W, and RV215W routers. Crafted HTTP requests from an authenticated remote administrator can trigger arbitrary code execution as root or device reload. CVSS v3.1 is 7.2 with high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to listed Cisco Small Business RV router models, especially where the web management interface is reachable over a network and administrator credentials could be misused or compromised.
Exploitation context
The sources require valid administrator credentials. KEV is false, and the provided sources do not establish active exploitation. The issue is still serious because successful exploitation can result in root-level control or denial of service.
Researcher notes
Evidence supports authenticated remote RCE and DoS through crafted HTTP requests against the management interface. The bundle names CWE-121 and CVSS AV:N/AC:L/PR:H/UI:N. It does not provide patch details, exploit maturity, or safe proof-of-concept validation methods.
Mitigation direction
- Review Cisco’s advisory for current vendor guidance before deciding treatment.
- Identify and prioritize affected RV110W, RV130, RV130W, and RV215W devices.
- Restrict management interface access to trusted administrative paths only.
- Audit administrator accounts and remove unused or shared credentials.
- Plan replacement or compensating controls where no vendor update is available.
Validation and detection
- Inventory network devices for the named Cisco Small Business RV models.
- Confirm whether each device exposes the web-based management interface.
- Verify administrator account ownership and credential hygiene.
- Check whether any affected device has unexpected reloads or configuration changes.
- Document that Cisco reported no software updates in the cited advisory.
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-2021-1199 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.
