Security readout for executives and security teams
Plain-English summary
This flaw affects the management interface of several Cisco Small Business RV routers. A logged-in administrator-level attacker could crash the router or run code as root. Cisco stated it did not release software updates for these vulnerabilities, so exposed management access is the key business concern.
Executive priority
High priority for organizations still using these routers in business networks. The issue needs attention because impact is severe and Cisco did not identify a software update, but exploitation requires administrator credentials.
Technical view
CVE-2021-1176 covers multiple web-based management interface vulnerabilities in Cisco RV110W, RV130, RV130W, and RV215W routers. Improper validation of user-supplied input can allow crafted HTTP requests by an authenticated remote administrator to trigger arbitrary root-level code execution or device reload causing DoS.
Likely exposure
Exposure is most likely where affected RV router management interfaces are reachable by administrators or networks where administrator credentials could be abused. The source bundle does not provide affected firmware version ranges or CPE precision.
Exploitation context
The sources require valid administrator credentials. The bundle does not indicate CISA KEV listing or active exploitation. Exploitability is still meaningful because successful abuse can provide root-level control or disrupt routing availability.
Researcher notes
Do not assess this as unauthenticated RCE. The CVSS vector includes PR:H and the description requires valid administrator credentials. The bundle lacks firmware-range detail, patch availability beyond Cisco's no-update statement, and any confirmed exploitation evidence.
Mitigation direction
- Check Cisco's advisory for current guidance before selecting remediation.
- Do not assume a firmware fix exists; Cisco reported no software updates.
- Restrict management-interface access to trusted administrative networks.
- Review and harden administrator credential handling for affected routers.
- Prioritize lifecycle planning for affected models lacking a vendor update.
Validation and detection
- Inventory Cisco RV110W, RV130, RV130W, and RV215W routers.
- Confirm whether web-based management is reachable from untrusted networks.
- Verify who has administrator credentials on each affected device.
- Review logs for unexpected management access or router reloads.
- Record firmware and model details for vendor guidance comparison.
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-2021-1176 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.
