CVE-2018-0167 Cisco CVE debrief

Who should care

Network and security teams responsible for Cisco IOS, XR, or XE devices, especially internet-facing infrastructure and systems that cannot tolerate service disruption.

Technical summary

The available official sources identify the issue as a buffer overflow in Cisco IOS, XR, and XE Software. The CISA KEV entry confirms it as a known exploited vulnerability and directs defenders to apply vendor updates. The supplied corpus does not include version ranges, attack prerequisites, or impact specifics, so validation should be done against the linked Cisco and NVD records.

Defensive priority

High. CISA KEV listing means defenders should prioritize remediation on affected Cisco network devices ahead of routine maintenance.

Recommended defensive actions

• Confirm whether any Cisco IOS, XR, or XE devices are in scope by checking the linked vendor and NVD records.
• Apply Cisco’s recommended updates and follow vendor instructions as soon as operationally feasible.
• If immediate patching is not possible, reduce exposure of affected devices and place them under heightened monitoring.
• Validate remediation and track the asset inventory so all affected systems are updated within your change window and, historically, within the CISA KEV due date of 2022-03-17.

Evidence notes

Evidence is limited to official metadata: the CVE record, NVD detail page, and CISA KEV entry. The corpus identifies the issue as a Cisco IOS/XR/XE buffer overflow and records it as known exploited, with the remediation instruction to apply vendor updates. No additional technical fields were supplied in the prompt.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.