CVE-2026-89147: Net-SNMP through 5.9.5.2 Denial of Service via Blocking Unauthenticated SMUX Read
net-snmp · Net-SNMP
Affected: Net-SNMP · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 42% of scored CVEs
DescriptionCVE.org
Net-SNMP through 5.9.5.2 contains a denial of service vulnerability in the SMUX module where smux_accept() performs an unauthenticated blocking read without timeout on newly accepted connections. An unauthenticated remote client can connect to the SMUX listener and send no data, causing the single-threaded snmpd main loop to block indefinitely and suspend all SNMP processing.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- net-snmp · Net-SNMPup to and including 5.9.5.2
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- net-snmp
- Published
- September 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-89147 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.