CVE-2026-24700: Cisco RV Series Routers OS command injection in start_lltd

CVE-2026-24700 · Severity: info · CVSS 8.8 · Published 2026-07-08

A security vulnerability exists in several Cisco small business routers used for networking and VPN connectivity. An authorized user could exploit this flaw to take full control of the device by injecting malicious commands into the system's configuration settings. This could lead to a complete compromise of the router, allowing an attacker to intercept network traffic or disrupt business operations.

Technologies: Cisco RV110W Wireless-N VPN Firewall. Vendors: Cisco.

Quick answers

Is CVE-2026-24700 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-24700 being exploited in the wild.
How severe is CVE-2026-24700?
Informational severity, with a CVSS score of 8.8, published 8 July 2026.
Which products and versions are affected?
Cisco RV110W Wireless-N VPN Firewall 1.2.2.5, 1.2.2.8; Cisco RV130 VPN Firewall 1.0.3.55; Cisco RV130W Wireless-N VPN Firewall 1.0.3.55.
Is there a fix for CVE-2026-24700?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-24700 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-24700?
Check whether you run Cisco RV110W Wireless-N VPN Firewall, Cisco RV130 VPN Firewall or Cisco RV130W Wireless-N VPN Firewall at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

An OS command injection vulnerability exists in the start_lltd() function within the 'rc' binary of affected Cisco router firmware. The vulnerability is caused by a failure to sanitize the 'machine_name' NVRAM configuration parameter before it is passed to a sprintf() call that constructs a shell command. Specifically, the parameter is concatenated into a string ('echo \"%s\" > /proc/sys/kernel/hostname') which is then executed via the system() function. An authenticated remote attacker can exploit this by setting a malicious 'machine_name' containing shell metacharacters (e.g., backticks or semicolons) to achieve arbitrary code execution with root privileges.

Affected products

  • Cisco RV130 VPN Firewall 1.0.3.55
  • Cisco RV130W Wireless-N VPN Firewall 1.0.3.55
  • Cisco RV110W Wireless-N VPN Firewall 1.2.2.5, 1.2.2.8

Timeline

  • 2026-07-08: disclosed
  • 2026-07-08: advisory

References

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