Security readout for executives and security teams
Plain-English summary
Cisco Small Business RV routers have a web management flaw that lets a logged-in administrator run operating system commands on the device. If an attacker already has admin access, they could take full control of the router with root privileges.
Executive priority
Treat this as high priority for legacy or internet-managed branch routers. The privilege requirement reduces broad opportunistic risk, but root command execution on perimeter networking equipment can support traffic interception, outages, or deeper compromise.
Technical view
CVE-2020-3278 is a CWE-77 command injection issue in web-based management scripts for Cisco RV016, RV042, RV082, RV320, and RV325 routers. Improper input validation allows authenticated remote administrators to send malicious requests and execute arbitrary commands as root. CVSS 3.0 score is 7.2 high, with PR:H required.
Likely exposure
Exposure is most relevant where affected Cisco Small Business RV routers still exist and their web management interface is reachable by administrators, especially over untrusted networks. The source bundle does not provide exact affected firmware ranges or deployment prevalence.
Exploitation context
The provided sources do not show CISA KEV listing or cited evidence of active exploitation. Exploitation requires administrative privileges to the web management interface, but successful exploitation gives root-level command execution on the router.
Researcher notes
Key constraints are PR:H and management-interface reachability. The bundle lacks affected firmware ranges, patch identifiers, and exploit telemetry, so validation should center on model inventory, Cisco advisory matching, and management-plane exposure. Avoid assuming unauthenticated exploitation or active exploitation from these sources.
Mitigation direction
- Inventory Cisco RV016, RV042, RV082, RV320, and RV325 routers.
- Review Cisco's advisory for fixed firmware, workarounds, or support status.
- Restrict web management access to trusted administration networks only.
- Disable remote management exposure where business operations allow.
- Rotate router administrator credentials if compromise is suspected.
Validation and detection
- Confirm whether affected RV Series router models are deployed.
- Check firmware versions against Cisco's advisory guidance.
- Verify management interfaces are not exposed to the public internet.
- Review admin account access and recent configuration changes.
- Look for unexpected router commands, configuration changes, or persistence indicators.
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-77: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. 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-2020-3278 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 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/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:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H1.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.2HighVector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20200617 Cisco Small Business RV Series Routers 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 Neutralization of Special Elements used in a Command ('Command Injection')
Improper Neutralization of Special Elements used in a Command ('Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.