Security readout for executives and security teams
Plain-English summary
CVE-2023-20118 lets someone who already has valid administrator credentials run commands as root through the web management interface of affected Cisco Small Business RV routers. Cisco says it will not release software updates. Because CISA lists it as known exploited, affected devices should be handled as an urgent remediation item.
Executive priority
Treat this as high priority despite the medium CVSS score because CISA lists it as known exploited and Cisco will not patch it. Focus on finding affected routers, applying the vendor workaround, and deciding whether unsupported devices should remain in service.
Technical view
The issue is improper validation of user input in incoming HTTP packets to the web-based management interface, mapped to CWE-77. An authenticated remote attacker with administrative credentials can send a crafted HTTP request and execute arbitrary commands with root-level privileges, potentially exposing unauthorized data. CVSS 3.1 score is 6.5, with high confidentiality and integrity impact.
Likely exposure
Exposure is limited to Cisco RV016, RV042, RV042G, RV082, RV320, and RV325 routers running listed affected firmware. Risk is higher where administrative web management is reachable by untrusted networks or where administrator credentials may be compromised.
Exploitation context
CISA KEV status supports that this CVE has been exploited in the wild. The public source bundle does not provide exploit details, affected campaign context, or indicators of compromise. Exploitation requires valid administrative credentials, but successful abuse gives root-level command execution.
Researcher notes
The evidence supports authenticated remote command execution through the web management interface with root privileges. The source bundle does not include proof-of-concept details, compromise indicators, or patch availability. Analysis should distinguish credential prerequisite from post-exploitation impact, which is severe on affected routers.
Mitigation direction
- Identify affected Cisco RV router models and firmware versions.
- Disable the affected feature using Cisco's advisory workaround.
- Do not expect a Cisco software update for this CVE.
- Review Cisco guidance before applying configuration changes.
- Prioritize replacement where workaround is not operationally acceptable.
Validation and detection
- Inventory Cisco RV016, RV042, RV042G, RV082, RV320, and RV325 routers.
- Compare installed firmware against the affected versions listed in the CVE data.
- Confirm whether web-based management is enabled on affected devices.
- Verify the Cisco workaround is applied where applicable.
- Review administrative account integrity and recent management access logs.
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-77: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. 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 lookupCVE-2023-20118 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
- 6.5 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
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.
CISA KEV status
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:H/I:H/A:N1.25.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- cisco-sa-sbr042-multi-vuln-ej76Pke5CVE reference
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-20118CVE reference · government-resource
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 Neutralization of Special Elements used in a Command ('Command Injection')
Improper Neutralization of Special Elements used in a Command ('Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.