Security readout for executives and security teams
Plain-English summary
These Cisco small business routers can be taken over or forced to restart through their web management interface if an attacker already has administrator credentials. Cisco has not released software updates for the issue, so exposure depends heavily on whether these devices are still deployed and how management access is controlled.
Executive priority
Treat this as a high-priority lifecycle and access-control issue if these routers remain in use. The main business risk is full device compromise or service disruption, and the lack of vendor software updates raises urgency for replacement planning.
Technical view
CVE-2021-1212 covers multiple authenticated remote vulnerabilities in the web-based management interface of Cisco RV110W, RV130, RV130W, and RV215W routers. Improper validation of user input can allow arbitrary code execution as root or device reload causing DoS. CVSS 3.1 score is 7.2 high; CWE-121 is listed.
Likely exposure
Exposure is most likely in organizations still running the named Cisco Small Business RV routers, especially where the management interface is reachable beyond tightly controlled admin networks. The source bundle does not provide affected firmware version ranges.
Exploitation context
The source states exploitation requires valid administrator credentials and crafted HTTP requests to the management interface. KEV status is false, and the provided sources do not establish active exploitation in the wild.
Researcher notes
Key constraints are authenticated access and management-interface reachability. The bundle lacks firmware-specific version detail and does not identify a vendor patch. Avoid assuming unauthenticated exploitation or active exploitation without additional evidence.
Mitigation direction
- Check Cisco's advisory for current vendor guidance.
- Plan replacement or compensating controls where no fixed firmware is available.
- Restrict management interface access to trusted administrative networks.
- Review and rotate router administrator credentials.
- Monitor affected routers for unexpected reloads or configuration changes.
Validation and detection
- Inventory Cisco RV110W, RV130, RV130W, and RV215W routers.
- Confirm whether web-based management is reachable remotely.
- Verify administrator accounts and remove unnecessary access.
- Review logs for unexpected reloads or suspicious administrative activity.
- Document compensating controls for any affected device retained.
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-2021-1212 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.
