CVE-2026-12851 GeoVision GV-I/O Box 4E libNetSetObj.so OS command injection vulnerability
Attackers can execute arbitrary OS commands on GeoVision GV-I/O Box 4E devices by sending crafted network packets to the DNS configuration service.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-12851?
CVE-2026-12851 is a critical command injection vulnerability in GeoVision Inc. GV-I/O Box 4E, published on 24 Jun 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Multiple OS command injection vulnerabilities exist in the libNetSetObj.so functionality of GeoVision GV-I/O Box 4E 2.09. A specially crafted network packet can lead to command execution. An attacker can send a network request to trigger this vulnerability.
`libNetSetObj.so` is an internal library used by various binaries on the device to configure the network stack (start and stop various services, configure IP, Netmask, gateway, dns, etc.)
#### CNetSetObj::m_F_n_Set_DNS_Addr command injection
The following function can take up to two addresses, performs no sanitization and then calls `system`. This is a classic command injection vulnerability. The function is reachable from both the network-exposed `DVRSearch` service and the `Network.cgi` endpoint.
int __fastcall CNetSetObj::m_F_n_Set_DNS_Addr(CNetSetObj *this, char *dns1, char *dns2)
{
int result; // r0
char v5[80]; // [sp+0h] [bp-50h] BYREF
if ( !dns1 )
result = 0;
if ( dns1 )
{
sprintf(v5, "/bin/echo nameserver %s > /etc/resolv.conf", dns1); // attacker controlled dns1 field
system(v5);
if ( dns2 )
{
sprintf(v5, "/bin/echo nameserver %s >> /etc/resolv.conf", dns2);
system(v5);
}
return 1;
}
return result;
Weakness: CWE-78
Which versions are affected by CVE-2026-12851?
How do I fix CVE-2026-12851?
No fix has been published for CVE-2026-12851 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-12851 being exploited?
There is no known exploitation of CVE-2026-12851 in the wild and no public exploit code.
Sources
Also known as GHSA-fx96-c5xr-q273.