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 admin credentials could abuse the web management interface to run code as root or crash the device. Cisco states no software updates were released, so risk management depends on finding exposed devices, limiting admin access, and following vendor guidance.
Executive priority
Treat this as high priority for networks still using these routers. The main business concern is loss of router integrity or availability after admin credential compromise, with no vendor software fix identified in the provided sources.
Technical view
Multiple web management interface flaws stem from improper validation of user-supplied input. Authenticated remote attackers with administrator credentials can send crafted HTTP requests that may cause root-level arbitrary code execution or device reload. The CVSS 3.1 score is 7.2, with high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to organizations still operating Cisco Small Business RV110W, RV130, RV130W, or RV215W routers, especially where management interfaces are reachable from untrusted networks. Valid administrator credentials are required for exploitation.
Exploitation context
The provided sources do not indicate CISA KEV listing or active exploitation. Exploitation requires network access to the management interface and valid administrator credentials. No public exploit status is established in the provided bundle.
Researcher notes
The bundle identifies CWE-121 and improper input validation in the web management interface. The advisory describes authenticated crafted HTTP requests but does not provide a patch, active exploitation evidence, or broader product impact beyond the named router models.
Mitigation direction
- Identify affected RV110W, RV130, RV130W, and RV215W devices in the environment.
- Restrict management interface access to trusted administrative networks only.
- Review Cisco advisory guidance because Cisco states no software updates were released.
- Rotate and protect administrator credentials for affected routers.
- Plan replacement or isolation where unsupported affected devices remain in use.
Validation and detection
- Inventory Cisco Small Business RV-series routers and confirm exact models.
- Verify whether web management interfaces are reachable from untrusted networks.
- Review administrator account access, credential age, and shared-account usage.
- Check monitoring for unexpected router reloads or unauthorized administrative activity.
- Document compensating controls where affected devices cannot be patched.
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-2021-1205 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.