Cisco SD-WAN Solution Certificate Validation Bypass Vulnerability
Description
A vulnerability in the Cisco SD-WAN Solution could allow an unauthenticated, remote attacker to bypass certificate validation on an affected device. The vulnerability is due to improper certificate validation. An attacker could exploit this vulnerability by supplying a system image signed with a crafted certificate to an affected device, bypassing the certificate validation. An exploit could allow an attacker to deploy a crafted system image.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Cisco SD-WAN Solution allows unauthenticated remote attackers to bypass certificate validation and deploy a crafted system image.
Vulnerability
The vulnerability exists in the certificate validation mechanism of the Cisco SD-WAN Solution [1]. An unauthenticated, remote attacker can bypass certificate validation by supplying a system image signed with a crafted certificate. Affected versions include all releases of Cisco SD-WAN Solution prior to the fixed releases provided in the Cisco advisory [1].
Exploitation
The attacker requires no authentication or prior access to the target network. The attacker crafts a malicious system image signed with a fraudulent certificate and delivers it to the affected device, e.g., via network-based upgrade mechanisms. The device accepts the image due to improper certificate validation, bypassing the intended security check.
Impact
Successful exploitation allows the attacker to deploy a crafted system image, bypassing the certificate validation. This can lead to full compromise of the affected device, potentially including arbitrary code execution, persistent control, and further network penetration.
Mitigation
Cisco has released free software updates to address this vulnerability [1]. Customers should upgrade to the fixed versions specified in Cisco Security Advisory cisco-sa-20181003-sd-wan-bypass [1]. No workarounds are available.
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-20181003-sd-wan-bypassmitrevendor-advisoryx_refsource_CISCO
- www.securityfocus.com/bid/105509mitrevdb-entryx_refsource_BID
News mentions
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