Cisco SD-WAN Solution Buffer Overflow Vulnerability
Description
A vulnerability in the vContainer of the Cisco SD-WAN Solution could allow an authenticated, remote attacker to cause a denial of service (DoS) condition and execute arbitrary code as the root user. The vulnerability is due to improper bounds checking by the vContainer. An attacker could exploit this vulnerability by sending a malicious file to an affected vContainer instance. A successful exploit could allow the attacker to cause a buffer overflow condition on the affected vContainer, which could result in a DoS condition that the attacker could use to execute arbitrary code as the root user.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
A buffer overflow in the vContainer of Cisco SD-WAN Solution lets an authenticated remote attacker cause DoS or execute arbitrary code as root.
Vulnerability
A buffer overflow vulnerability exists in the vContainer component of the Cisco SD-WAN Solution (all versions prior to the fixed releases indicated in Cisco Security Advisory cisco-sa-20190123-sdwan-bo). The issue stems from improper bounds checking during file processing. An authenticated, remote attacker can trigger the overflow by sending a specially crafted malicious file to an affected vContainer instance.
Exploitation
To exploit the vulnerability, the attacker must have valid authentication credentials to access the affected vContainer system. The attacker then sends a malicious file designed to exceed the expected buffer size. The vContainer processes this file without adequate bounds verification, leading to a buffer overflow condition.
Impact
Successful exploitation allows the attacker to cause a denial of service (DoS) condition or execute arbitrary code with root privileges on the affected vContainer. This gives the attacker complete control over the compromised container and could lead to further compromise of the SD-WAN environment.
Mitigation
Cisco has released free software updates to address this vulnerability, as detailed in the advisory [1]. Customers should upgrade to the latest software version for their product. There are no known workarounds; updating to the fixed release is the only mitigation.
AI Insight generated on May 25, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.
Affected products
2- Cisco/Cisco SD-WAN Solutionv5Range: n/a
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
2- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-sdwan-bomitrevendor-advisoryx_refsource_CISCO
- www.securityfocus.com/bid/106703mitrevdb-entryx_refsource_BID
News mentions
0No linked articles in our index yet.