Security readout for executives and security teams
Plain-English summary
This flaw affects several Cisco Small Business RV routers. An attacker who already has administrative access to the web management interface could crash the router or run code as root. Business urgency depends on whether these older routers are still deployed and whether their management interface is reachable beyond tightly controlled administrators.
Executive priority
Treat this as high priority for legacy Cisco RV routers, especially if management interfaces are exposed. The privilege requirement lowers opportunistic risk, but root execution on perimeter networking devices can create serious operational and security impact.
Technical view
CVE-2020-3288 covers multiple stack overflow vulnerabilities in web management scripts for Cisco RV320, RV325, RV016, RV042, and RV082 routers. The issue is insufficient boundary restriction on user-supplied input. Exploitation requires authenticated remote administrative privileges and crafted oversized values, potentially causing denial of service or root-level arbitrary code execution.
Likely exposure
Exposure is most likely in environments still running the listed Cisco Small Business RV router families. Risk is materially higher where the web-based management interface is reachable from broad internal networks or the internet. The source bundle does not provide affected firmware version ranges.
Exploitation context
The source bundle does not identify active exploitation, and the CVE is not marked as CISA KEV. Exploitation requires valid administrative access to the router web interface, but successful exploitation can lead to root-level code execution or device crashes.
Researcher notes
Key constraints are PR:H, AV:N, and UI:N under CVSS 3.0 with score 7.2. The bundle names affected router families but not exact vulnerable firmware versions, fixed releases, exploit availability, or vendor mitigations beyond the Cisco advisory reference.
Mitigation direction
- Inventory Cisco RV320, RV325, RV016, RV042, and RV082 routers.
- Check Cisco’s advisory for affected firmware and upgrade guidance.
- Restrict web management access to trusted administrative networks only.
- Remove internet exposure for router management interfaces.
- Review and rotate administrative credentials where exposure is suspected.
Validation and detection
- Confirm whether listed router models remain deployed.
- Record firmware versions and compare them with Cisco’s advisory.
- Verify management interfaces are not internet-accessible.
- Review router logs for unexpected admin sessions or crashes.
- Confirm administrative access is limited to approved personnel.
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-2020-3288 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.
Improper Restriction of Operations within the Bounds of a Memory Buffer
Improper Restriction of Operations within the Bounds of a Memory Buffer represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.