Security readout for executives and security teams
Plain-English summary
Cisco Small Business RV routers have web management flaws that can let a logged-in administrator crash the device or run code as root. The attacker already needs admin-level access, so the main business risk is compromised admin credentials, exposed management interfaces, or insider misuse leading to router takeover.
Executive priority
Treat as high priority for environments still using these routers. It is not clearly internet-wormable from the provided evidence because admin privileges are required, but successful exploitation could give root-level control over network edge equipment.
Technical view
CVE-2020-3293 covers stack overflows in web-based management scripts for Cisco RV320, RV325, RV016, RV042, and RV082 routers. Insufficient boundary restrictions on user input let an authenticated remote administrative user send oversized values, potentially causing denial of service or arbitrary code execution with root privileges.
Likely exposure
Exposure is most likely where affected Cisco Small Business RV routers are still deployed and their web-based management interface is reachable by administrators, especially from broad internal networks or the internet. The vulnerability requires administrative privileges.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. Public sources support authenticated remote exploitation with administrative privileges, but not unauthenticated exploitation or confirmed exploitation in the wild.
Researcher notes
The weakness is categorized as CWE-119 and is triggered by oversized user-supplied values in web management scripts. Validation should stay defensive: identify affected models, firmware status, management-plane reachability, and evidence of admin compromise or device instability.
Mitigation direction
- Check Cisco’s advisory for fixed software, workarounds, and model-specific guidance.
- Restrict web management access to trusted administrative networks only.
- Review and harden administrator accounts, passwords, and MFA options where available.
- Remove or replace affected routers that cannot receive vendor-supported fixes.
- Monitor router stability and administrative access for suspicious changes.
Validation and detection
- Inventory Cisco RV320, RV325, RV016, RV042, and RV082 routers.
- Confirm firmware versions against Cisco’s advisory guidance.
- Verify web management is not exposed to untrusted networks.
- Review admin login history for unexpected access.
- Check for unexplained router crashes or configuration changes.
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-119: 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-2020-3293 mapping review
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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 Stack Overflow Arbitrary Code Execution 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.