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Net-SNMP Vulnerability Triggers Buffer Overflow, Crashing the Daemon

A critical buffer overflow vulnerability has been identified in the Net-SNMP snmptrapd daemon. This flaw, tracked as CVE-2025-68615, allows remote attackers to crash the service by sending specially crafted packets. This disruption can affect network…

SBy Sean AveryDec 25, 20251 min read

A critical buffer overflow vulnerability has been identified in the Net-SNMP snmptrapd daemon. This flaw, tracked as CVE-2025-68615, allows remote attackers to crash the service by sending specially crafted packets. This disruption can affect network monitoring operations across enterprise environments.

The vulnerability affects all versions of Net-SNMP prior to the release of recent patches. It was discovered by security researcher Buddurid in collaboration with the Trend Micro Zero Day Initiative and reported through coordinated disclosure channels.

The vulnerability has been assigned a CVSS v3.1 score of 9.8 out of 10, indicating critical severity. It is exploitable without authentication, requiring no user interaction or special privileges. The network-based attack vector makes any exposed snmptrapd instance potentially vulnerable.

Exploitation of this flaw can result in a complete compromise of confidentiality, integrity, and availability. The buffer overflow occurs when snmptrapd processes maliciously crafted SNMP trap packets, leading to a crash and cessation of network monitoring functions until manually restarted.

A critical buffer overflow vulnerability has been identified in the Net-SNMP snmptrapd daemon.
Sean Avery · Thehackingpost

Net-SNMP maintainers, including prominent contributor Wes Hardaker, have released patched versions 5.9.5 and 5.10.pre2. Organizations running snmptrapd in production environments should prioritize immediate upgrades to these versions to eliminate the attack vector.

Net-SNMP is a fundamental component of network management infrastructure. Its widespread deployment across enterprise networks amplifies the potential impact of this vulnerability. Security experts advise that SNMP ports should never be exposed to public networks. For vulnerable deployments, no effective mitigation beyond immediate patching exists. Network segmentation and firewall rules restricting snmptrapd access to trusted management networks can reduce exposure but do not eliminate the vulnerability.

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Organizations must upgrade to Net-SNMP 5.9.5 or 5.10.pre2 without delay due to the critical nature of this flaw, its network-exploitable characteristics, and lack of authentication requirements. This demands urgent attention from network administrators and security teams responsible for infrastructure monitoring systems.

Based on reporting by GBHackers.

AI transparency. This article was produced with the assistance of artificial intelligence and published under human editorial oversight. AI systems can make mistakes. Read how we use AI (EU AI Act, Art. 50).
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