Security readout for executives and security teams
Plain-English summary
This affects older Cisco Small Business RV110W, RV130, RV130W, and RV215W routers. A logged-in administrator, or someone with stolen admin credentials, could abuse the web management interface to run commands as root or crash the device. Cisco did not release software updates for these vulnerabilities.
Executive priority
Treat as high priority where these routers remain deployed, especially if management access is exposed beyond a tightly controlled admin network. The lack of Cisco software updates shifts remediation toward access restriction, credential control, and device replacement planning.
Technical view
The issue is improper validation of user input in the web-based management interface, mapped to CWE-121. Cisco describes authenticated remote command execution and denial of service via crafted HTTP requests. CVSS 3.1 is 7.2 high: network reachable, low complexity, high privileges required, no user interaction, high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to Cisco Small Business RV110W, RV130, RV130W, and RV215W routers with accessible web-based management. The attacker must have valid administrator credentials, so credential theft, shared admin accounts, or exposed management portals materially increase risk.
Exploitation context
The provided sources do not show active exploitation, and the CVE is not marked KEV. Exploitation requires authenticated administrator access and crafted HTTP requests to the management interface. The impact is serious because successful exploitation can run code as root or force a device reload.
Researcher notes
Evidence supports authenticated remote RCE and DoS through management-interface input validation flaws. Do not assume unauthenticated exploitation from the supplied sources. The source bundle does not provide a patch, workaround details, proof of exploitation, or product-specific firmware version ranges.
Mitigation direction
- Check Cisco advisory and support channels for current vendor guidance.
- Restrict web management access to trusted administrator networks only.
- Audit administrator accounts and rotate weak or shared credentials.
- Replace or retire affected devices where no vendor update exists.
Validation and detection
- Inventory Cisco RV110W, RV130, RV130W, and RV215W routers.
- Confirm whether web-based management is reachable from untrusted networks.
- Review admin account usage, credential age, and unexpected logins.
- Verify whether any affected device remains in production without compensating controls.
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-2021-1185 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.
