Security readout for executives and security teams
Plain-English summary
This affects older Cisco Small Business RV110W, RV130, RV130W, and RV215W routers. An attacker with valid administrator credentials could take root-level control of the device or crash it through the web management interface. Cisco states it has not released software updates for these vulnerabilities.
Executive priority
Treat this as high priority for any still-deployed affected routers, especially at branch offices or small sites. Because Cisco did not release fixes in the cited advisory, risk reduction depends on replacement, isolation of management access, and credential control.
Technical view
Cisco describes improper validation of user-supplied input in the web-based management interface. The CVSS 3.1 vector is AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. Successful exploitation can execute arbitrary code as root or reload the router, causing denial of service.
Likely exposure
Exposure is most likely where these specific Cisco Small Business routers remain deployed and their management interface is reachable by administrators or hostile network paths. Exploitation requires valid administrator credentials, so compromised or shared admin accounts materially increase risk.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The attack is authenticated and remote against the management interface, with high confidentiality, integrity, and availability impact after administrative access is obtained.
Researcher notes
CWE-121 is listed, but the provided sources do not include affected fixed versions, exploit indicators, or packet-level details. The affected firmware version is recorded as n/a in the bundle, so validation should focus on model inventory and management-plane exposure.
Mitigation direction
- Replace or retire affected router models where feasible.
- Restrict management interface access to trusted admin networks or VPN.
- Review administrator accounts and enforce strong, unique credentials.
- Monitor for unexpected device reloads and unusual admin access.
- Check Cisco guidance because no software update is named.
Validation and detection
- Inventory for RV110W, RV130, RV130W, and RV215W devices.
- Confirm whether web management is reachable from untrusted networks.
- Review administrator account ownership and credential hygiene.
- Check logs for unexpected reloads or unusual management sessions.
- Compare findings against the Cisco 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-2021-1207 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.
