Security readout for executives and security teams
Plain-English summary
This issue affects Cisco Small Business RV110W, RV130, RV130W, and RV215W routers. An attacker with valid Administrator credentials could use the web management interface to run commands as root or crash the router. Cisco has not released software updates in the provided sources, so exposed devices should be treated as operational risk.
Executive priority
Medium priority for most environments, higher where these routers protect business-critical sites or have reachable management interfaces. Since no software update is cited, prioritize inventory, exposure reduction, credential review, and replacement planning.
Technical view
The vulnerabilities are in the web-based management interface and stem from insufficient validation of user fields in incoming HTTP packets. Exploitation requires network access to that interface and valid Administrator credentials. Successful exploitation can allow root-level command execution or an unexpected restart causing denial of service.
Likely exposure
Exposure is limited to the named Cisco Small Business RV router models where the web-based management interface is reachable and an attacker can obtain Administrator credentials. Internet-exposed or broadly reachable management interfaces increase concern.
Exploitation context
The bundle does not report known active exploitation, and KEV status is false. The described attack is authenticated, remote, low complexity, and high privilege, which lowers broad exploitability but remains serious for compromised admin accounts.
Researcher notes
Do not assume unauthenticated exploitation. The source states valid Administrator credentials are required. Focus validation on model identification, interface exposure, credential controls, and signs of command execution or DoS. Evidence is incomplete on workarounds beyond Cisco guidance.
Mitigation direction
- Check Cisco advisory for current remediation or replacement guidance.
- Inventory RV110W, RV130, RV130W, and RV215W devices.
- Limit access to the web-based management interface where feasible.
- Review Administrator accounts and remove unnecessary access.
- Monitor affected routers for unexpected restarts or configuration changes.
Validation and detection
- Confirm whether any named RV models remain deployed.
- Verify management interface reachability from untrusted networks.
- Review admin credential ownership and recent authentication activity.
- Check device logs for restarts or suspicious management requests.
- Document whether Cisco has released newer guidance since the advisory.
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-120: 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-2022-20876 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
- Medium
- CVSS
- 4.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
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:L/I:L/A:L1.23.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.7MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
Source materials
- CVE List V5 sourceCVE List V5
- 20220720 Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers 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.
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.