A vulnerability in the web-based management interface of Cisco Small Business Routers RV016, RV042, RV042G, RV082, RV320, and RV325 Routers could allow an authenticated, remote attacker to execute arbitrary commands on an affected device. This vulnerability is due to improper validation of user input within incoming HTTP packets. An attacker could exploit this vulnerability by sending a crafted HTTP request to the web-based management interface. A successful exploit could allow the attacker to gain root-level privileges and access unauthorized data. To exploit this vulnerability, an attacker would need to have valid administrative credentials on the affected device. Cisco has not and will not release software updates that address this vulnerability. However, administrators may disable the affected feature as described in the Workarounds ["#workarounds"] section. {{value}} ["%7b%7bvalue%7d%7d"])}]]
Conclusion & alert: CVE-2023-20118 is rated Critical Active Threat (81.8/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 3.83%). Core evidence: CISA KEV confirms active exploitation (added 2025-03-03) affecting Cisco / Small Business RV Series Routers. a weakness (CWE-77) Unauthenticated remote administrative access may be possible. Mandatory action: The CISA remediation deadline has passed—treat as an emergency patch priority.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
: Cisco Small Business RV Series Routers Command Injection Vulnerability · CISA KEV detail
: 2025-03-03
: 2025-03-24
: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-08 | 3.93% | 3.83% | -0.10% |
| 2 | 2026-05-26 | 3.83% | 3.93% | +0.10% |
| 3 | 2026-04-06 | — | 3.83% | — |
Full EPSS history (42 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 6.5 | 3.1 | MEDIUM |
|
1.2 | 5.2 | [email protected] |
| 7.2 | 3.1 | HIGH |
|
1.2 | 5.9 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| cisco | rv016_firmware | — | cpe:2.3:o:cisco:rv016_firmware:*:*:*:*:*:*:*:* |
| cisco | rv042_firmware | — | cpe:2.3:o:cisco:rv042_firmware:*:*:*:*:*:*:*:* |
| cisco | rv042g_firmware | — | cpe:2.3:o:cisco:rv042g_firmware:*:*:*:*:*:*:*:* |
| cisco | rv082_firmware | — | cpe:2.3:o:cisco:rv082_firmware:*:*:*:*:*:*:*:* |
| cisco | rv320_firmware | — | cpe:2.3:o:cisco:rv320_firmware:*:*:*:*:*:*:*:* |
| cisco | rv325_firmware | — | cpe:2.3:o:cisco:rv325_firmware:*:*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sbr042-multi-vuln-ej76Pke5 | Mitigation Vendor Advisory |
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-20118 | US Government Resource |