Cisco IOS XE SD-WAN Software vDaemon Denial of Service Vulnerability
Description
A vulnerability in the vDaemon process of Cisco IOS XE SD-WAN Software could allow an unauthenticated, remote attacker to cause a device to reload, resulting a denial of service (DoS) condition. This vulnerability is due to insufficient handling of malformed packets. An attacker could exploit this vulnerability by sending crafted traffic to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
A vulnerability in the vDaemon process of Cisco IOS XE SD-WAN Software allows unauthenticated remote attackers to cause a denial of service via crafted packets.
Vulnerability
The vDaemon process in Cisco IOS XE SD-WAN Software improperly handles malformed packets. An unauthenticated, remote attacker can send crafted traffic to an affected device, causing the device to reload. This vulnerability affects multiple versions of Cisco IOS XE SD-WAN Software; see the advisory [1] for specific version details.
Exploitation
No authentication is required; an attacker only needs network reachability to the targeted device. By sending specially crafted packets to the vDaemon process, the attacker triggers the vulnerability.
Impact
Successful exploitation results in a device reload, leading to a denial of service (DoS) condition. The affected device becomes unavailable until it completes the reboot process.
Mitigation
Cisco has released software updates to address this vulnerability. Customers should upgrade to a fixed release as recommended in the Cisco Security Advisory [1]. There are no known workarounds; upgrading is the only mitigation.
AI Insight generated on May 26, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.
Affected products
2- Range: n/a
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
1- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-sdwdos-4zeEeC9wmitrevendor-advisoryx_refsource_CISCO
News mentions
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