from disclosure to weapon1 day
Action required by CISAfederal deadline: 2025-10-20
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
In short
A flaw in Cisco IOS and IOS XE's SNMP system allows attackers with low SNMP access to crash the device, or those with high privileges to run code as root by sending specially crafted SNMP packets. This affects the core management interface many networks rely on.
Technical detail
Stack overflow vulnerability in SNMP subsystem triggered by malformed SNMP packets over IPv4/IPv6. Low-privilege attackers with SNMPv2c/v3 read credentials can trigger DoS via device reload; high-privilege attackers with SNMPv1/v2c read credentials plus administrative access can achieve arbitrary code execution as root. Affects all SNMP versions on Cisco IOS and IOS XE.
Summary generated and translated by AI from the official description.
The full analysis of this CVE is available in Portuguese →
A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS Software and Cisco IOS XE Software could allow the following:
An authenticated, remote attacker with low privileges could cause a denial of service (DoS) condition on an affected device that is running Cisco IOS Software or Cisco IOS XE Software. To cause the DoS, the attacker must have the SNMPv2c or earlier read-only community string or valid SNMPv3 user credentials.
An authenticated, remote attacker with high privileges could execute code as the root user on an affected device that is running Cisco IOS XE Software. To execute code as the root user, the attacker must have the SNMPv1 or v2c read-only community string or valid SNMPv3 user credentials and administrative or privilege 15 credentials on the affected device.
An attacker could exploit this vulnerability by sending a crafted SNMP packet to an affected device over IPv4 or IPv6 networks.
This vulnerability is due to a stack overflow condition in the SNMP subsystem of the affected software. A successful exploit could allow a low-privileged attacker to cause the affected system to reload, resulting in a DoS condition, or allow a high-privileged attacker to execute arbitrary code as the root user and obtain full control of the affected system.
Note: This vulnerability affects all versions of SNMP.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
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