CVE-2011-3278: n/a vulnerability

CVE-2011-3278: Unspecified vulnerability in the NAT implementation in Cisco IOS 12.1 through 12.4 and 15.0 through 15.1, a...

Unspecified vulnerability in the NAT implementation in Cisco IOS 12.1 through 12.4 and 15.0 through 15.1, and IOS XE 3.1.xSG, allows remote attackers to cause a denial of service (device reload) by sending crafted SIP packets to UDP port 5060, aka Bug ID CSCti48483.

UnknownCVSS not scoredNot KEV-listedUpdatedSep 16, 2024, 20:17 UTC (UTC+00:00)

Security readout for executives and security teams

This Cisco IOS/IOS XE NAT flaw can let a remote attacker crash and reload an affected network device by sending crafted SIP traffic. For executives, the main risk is outage: routers or switches performing NAT could restart unexpectedly, interrupting connectivity and services that depend on them. Exposure is most likely on legacy Cisco IOS or IOS XE devices using NAT and reachable by SIP traffic on UDP/5060. Internet-facing or partner-facing voice networks deserve priority review. The source bundle does not identify specific device models. Prioritize if affected devices sit on the network edge, support voice services, or provide critical NAT paths. The business risk is service disruption, not data theft, based on the provided sources. Mitigation focus: Check Cisco advisory for fixed releases and upgrade guidance.; Identify affected IOS or IOS XE versions in inventory.; Limit UDP/5060 reachability to trusted SIP peers where feasible..

Prepared: Jun 27, 2026, 17:48 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Oct 3, 2011, 23:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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0CVSS vectors

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1Source links

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Source materials

CVE List V5 sourceCVE List V5

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

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Weakness

CWE details

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