Security readout for executives and security teams
Plain-English summary
This issue affects older Cisco Small Business RV routers. An attacker who already has Administrator credentials could abuse the router’s web management interface to run commands as root or force a restart. Cisco’s source says it has not released software updates for these vulnerabilities.
Executive priority
Treat this as a moderate but operationally important risk. The attacker needs admin credentials, lowering likelihood, but affected routers sit at network edges and Cisco has not provided software updates in the cited material.
Technical view
CVE-2022-20900 is an authenticated remote command execution and denial-of-service issue in the web-based management interface of Cisco RV110W, RV130, RV130W, and RV215W routers. The stated cause is insufficient validation of user fields within incoming HTTP packets, associated with CWE-120.
Likely exposure
Exposure is most likely where affected RV-series routers remain deployed and their web management interface is reachable. The source bundle does not provide affected firmware version ranges, so inventory must verify model presence directly.
Exploitation context
The bundle does not cite active exploitation, and KEV status is false. Exploitation requires valid Administrator credentials on the affected device, but successful exploitation could provide root-level command execution or cause a denial of service.
Researcher notes
Do not assume patch availability from the provided sources. Validation should focus on model discovery, management-plane exposure, administrator credential hygiene, and evidence of unexpected device restarts or configuration changes.
Mitigation direction
- Identify and prioritize affected Cisco RV110W, RV130, RV130W, and RV215W routers.
- Check Cisco’s advisory for current vendor guidance and replacement recommendations.
- Restrict management interface access to trusted administrative networks only.
- Review Administrator accounts and remove unnecessary or shared credentials.
- Monitor affected routers for unexpected restarts or suspicious administrative activity.
Validation and detection
- Inventory edge and branch routers for the listed Cisco RV models.
- Confirm whether web-based management is reachable from untrusted networks.
- Review administrative account lists for stale, shared, or unnecessary access.
- Check change logs for unexpected configuration edits or restarts.
- Track Cisco advisory updates because no software fix is stated in the bundle.
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-2022-20900 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.
