Security readout for executives and security teams
Plain-English summary
Cisco lists multiple flaws in older Small Business RV routers that could let a logged-in administrator trigger root-level command execution or unexpected device restarts through the web management interface. Cisco has not released software updates for these vulnerabilities, so business risk depends on whether these routers remain deployed and how tightly management access is controlled.
Executive priority
Treat this as a replacement and exposure-reduction priority, not an emergency patch cycle. The vulnerability is authenticated and medium severity, but affected routers can be fully controlled or disrupted if administrator access is compromised.
Technical view
CVE-2022-20902 affects Cisco Small Business RV110W, RV130, RV130W, and RV215W routers. The issue is insufficient validation of user fields in incoming HTTP packets to the web-based management interface. Exploitation requires valid Administrator credentials and network access to that interface. Impact includes arbitrary commands with root privileges or denial of service via unexpected restart.
Likely exposure
Exposure is most likely where affected RV-series routers are still in service and their web management interface is reachable by administrators over broad networks or the internet. The source bundle does not identify specific fixed firmware versions or patched releases.
Exploitation context
The provided sources do not show known active exploitation, and the CVE is not listed as KEV. Exploitation is constrained by the need for valid Administrator credentials, but successful exploitation can run commands as root or disrupt availability.
Researcher notes
The reported weakness maps to CWE-120 and CVSS 3.1 score 4.7, with AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L. Sources name no Cisco software update. Do not assume unauthenticated exploitation or public exploitation without additional evidence.
Mitigation direction
- Check Cisco’s advisory for current guidance and product status.
- Identify and replace affected devices where no vendor fix is available.
- Restrict web management access to trusted administration networks only.
- Remove any internet exposure of the management interface.
- Review and rotate Administrator credentials on affected devices.
- Monitor for unexpected router restarts and suspicious admin activity.
Validation and detection
- Inventory Cisco RV110W, RV130, RV130W, and RV215W devices.
- Confirm whether any affected devices remain in production.
- Verify web management is not reachable from untrusted networks.
- Review administrator account ownership and credential hygiene.
- Check logs or monitoring for unexplained restarts.
- Document compensating controls for devices awaiting replacement.
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-2022-20902 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.
