Security readout for executives and security teams
Plain-English summary
This flaw lets someone who already has administrator access to certain Cisco Small Business RV routers make the management interface run operating-system commands as root. It is serious because routers sit at network boundaries, but the cited record requires valid administrator credentials and does not show known active exploitation.
Executive priority
Treat as high priority for affected perimeter or branch routers. The business risk is elevated because compromise could provide root control of network infrastructure, but urgency depends on confirmed device presence, management-interface exposure, and administrator credential control.
Technical view
CVE-2021-1317 is improper input validation in the web-based management interface of Cisco RV016, RV042, RV042G, RV082, RV320, and RV325 routers. An authenticated remote administrator can send crafted HTTP requests that cause command execution with root privileges. CVSS v3.1 is 7.2, high, with PR:H and full CIA impact.
Likely exposure
Exposure is limited to organizations running the listed Cisco Small Business RV router models, especially where the web management interface is reachable beyond tightly controlled admin networks. The source bundle does not provide exact firmware version ranges.
Exploitation context
The provided sources require valid administrator credentials. KEV status is false, and the bundle does not cite active exploitation. Successful exploitation would give root-level command execution on the router operating system.
Researcher notes
The evidence supports authenticated command injection, CWE-20, root impact, and high severity. The bundle does not name exact affected firmware versions, fixed versions, workarounds, proof-of-concept status, or active exploitation. Avoid assuming unauthenticated exploitability.
Mitigation direction
- Check Cisco’s advisory for affected firmware and vendor-approved fixes.
- Restrict web management access to trusted administrative networks only.
- Remove unnecessary remote management exposure on affected routers.
- Review and limit administrator accounts on listed RV devices.
- Prioritize replacement if vendor-supported fixes are unavailable.
Validation and detection
- Inventory Cisco RV016, RV042, RV042G, RV082, RV320, and RV325 devices.
- Confirm whether each device exposes the web management interface.
- Identify firmware versions and compare them with Cisco advisory guidance.
- Review admin account ownership and credential hygiene.
- Check logs for unusual authenticated management activity.
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-20: 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-2021-1317 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
- 20210203 Cisco Small Business RV Series Routers Management Interface Command Injection 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.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
