Security readout for executives and security teams
Plain-English summary
Cisco small business routers listed in the advisory have an authenticated management-interface flaw that can let an administrator-level attacker run code as root or crash the device. Cisco has not released software updates in the provided sources, so affected devices should be treated as operational risk until vendor guidance is applied.
Executive priority
Treat this as a high-priority legacy edge-device risk. The exploit requires administrator credentials, but compromise can give root control or disrupt network availability, and the provided sources identify no Cisco software update.
Technical view
The issue affects the web-based management interface of Cisco RV110W, RV130, RV130W, and RV215W routers. Improper validation of user input in crafted HTTP requests can lead to arbitrary code execution as root or device reload. Exploitation requires valid administrator credentials. CVSS 3.1 is 7.2, with high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to organizations still using the named Cisco Small Business RV routers, especially where the management interface is reachable by untrusted networks or admin credentials are weak, shared, or compromised.
Exploitation context
The provided bundle does not show CISA KEV listing or active exploitation evidence. The required privilege level is high because valid administrator credentials are needed, but successful exploitation has root-level impact or denial of service.
Researcher notes
Focus validation on model identification, management-interface exposure, credential governance, and evidence of authenticated administrative anomalies. Avoid assuming unauthenticated exploitability or active exploitation; neither is supported by the provided bundle.
Mitigation direction
- Review Cisco’s advisory and current vendor guidance for affected devices.
- Inventory RV110W, RV130, RV130W, and RV215W routers in the environment.
- Restrict management-interface access to trusted administration networks only.
- Audit administrator accounts and remove unused or shared credentials.
- Prioritize replacement or isolation where no vendor update is available.
Validation and detection
- Confirm whether any named Cisco RV router models are deployed.
- Check whether management interfaces are reachable from untrusted networks.
- Verify administrator accounts are unique, current, and least necessary.
- Review logs for unusual authenticated management-interface activity.
- Document any affected devices without available software updates.
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
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CWE-121: Exact CWE lookup
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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-2021-1175 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.