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CVE-2018-0161 is a denial-of-service vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS Software on certain Cisco Catalyst switch models. When the device processes an SNMP read (GET) request that includes the ciscoFlashMIB object identifier (OID), a condition can be triggered that leads to excessive CPU utilization (SYS-3-CPUHOG) and a device restart. The issue is reachable remotely over SNMP and requires the attacker to be authenticated to SNMP (i.e., able to issue valid SNMPv2c community-based queries or SNMPv3 authenticated queries) against an affected, vulnerable IOS release on the impacted Catalyst platforms (2960-L, Catalyst Digital Building Series 8P/8U).
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
access-list 1 permit 192.168.0.1 and snmp-server community example RO 1.snmp-server view example ciscoFlashMIB excluded then snmp-server community example view example ro.snmp-server view example ciscoFlashMIB excluded and apply the view to the relevant group/user read access.Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
1 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.