Security readout for executives and security teams
This Cisco IOS XE flaw can let a remote unauthenticated attacker crash and reload a device when it is performing NAT for SIP traffic. Business impact is availability: affected routers or gateways could interrupt voice or network services that depend on SIP traversal. Exposure is most likely on Cisco IOS XE devices that perform NAT for SIP traffic, especially where UDP port 5060 can traverse the device from untrusted networks. The provided sources do not identify affected release ranges. Treat this as a targeted availability risk for Cisco IOS XE devices handling SIP NAT. Prioritize exposed voice or edge gateways because a successful attack can force a reload, but avoid emergency assumptions without confirmed affected versions or exploitation evidence. Mitigation focus: Review Cisco's advisory for affected releases, fixed software, and official workarounds.; Inventory Cisco IOS XE devices performing NAT for SIP traffic.; Limit untrusted UDP 5060 traffic through NAT paths where operationally feasible..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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Open ATT&CK lookupCVE-2018-0476 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- 20180926 Cisco IOS XE Software NAT Session Initiation Protocol Application Layer Gateway Denial of Service VulnerabilityCVE reference · vendor-advisory, x_refsource_CISCO
Products and packages named in the record
CWE details
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Resource Management Errors
Resource Management Errors represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.