CVE-2019-1858

Cisco FXOS and NX-OS Software Simple Network Management Protocol Denial of Service Vulnerability

HIGH

8.6

CVSS Score

Published: May 16, 2019 at 01:20 AM UTC

Updated: June 17, 2026 at 02:29 AM UTC

138 products affected across 1 vendorNx OSFirepower Extensible Operating SystemFxos

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Severity

HIGH8.6

Exploit prediction

EPSS 2%

SSVC

No known exploit

Description

A vulnerability in the Simple Network Management Protocol (SNMP) input packet processor of Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause the SNMP application to leak system memory, which could cause an affected device to restart unexpectedly. The vulnerability is due to improper error handling when processing inbound SNMP packets. An attacker could exploit this vulnerability by sending multiple crafted SNMP packets to an affected device. A successful exploit could allow the attacker to cause the SNMP application to leak system memory because of an improperly handled error condition during packet processing. Over time, this memory leak could cause the SNMP application to restart multiple times, leading to a system-level restart and a denial of service (DoS) condition.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Firepower Extensible Operating System · Cisco

95%

2.6 ≤ v < 2.6.1.131

Affected range stops below 2.6.1.131, so it looks safe — our inference, not a vendor statement

cisco-firepower-4110 (environment) · cisco-firepower-4120 (environment) · cisco-firepower-4140 (environment) · cisco-firepower-4150 (environment) · cisco-firepower-9300-with-1-sm-24-module (environment) · cisco-firepower-9300-with-1-sm-36-module (environment) · cisco-firepower-9300-with-1-sm-44-module (environment) · cisco-firepower-9300-with-3-sm-44-module (environment)

Fxos · Cisco

95%

v < 2.2.2.912.3 ≤ v < 2.3.1.1302.4 ≤ v < 2.4.1.222

Affected range stops below 2.2.2.91, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.3.1.130, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.4.1.222, so it looks safe — our inference, not a vendor statement

Nx OS · Cisconpm

95%

v < 14.0(2c)v < 5.2(1)sv3(4.1a)v < 6.0(2)a8(4)v < 6.2(22)v < 7.0(3)i4(8)v < 7.1(5)n1(1b)v < 8.1(1)14.1 ≤ v < 14.1(1i)7.0(3) ≤ v < 7.0(3)f3(1)7.0(3)i7 ≤ v < 7.0(3)i7(2)7.2 ≤ v < 7.2(0)d1(1)7.3 ≤ v < 7.3(4)n1(1a)8.0 ≤ v < 8.1(1)

Affected range stops below 14.0(2c), so it looks safe — our inference, not a vendor statement

Affected range stops below 14.1(1i), so it looks safe — our inference, not a vendor statement

Affected range stops below 5.2(1)sv3(4.1a), so it looks safe — our inference, not a vendor statement

Affected range stops below 6.0(2)a8(4), so it looks safe — our inference, not a vendor statement

Affected range stops below 6.2(22), so it looks safe — our inference, not a vendor statement

Affected range stops below 7.0(3)f3(1), so it looks safe — our inference, not a vendor statement

Affected range stops below 7.0(3)i4(8), so it looks safe — our inference, not a vendor statement

Affected range stops below 7.0(3)i7(2), so it looks safe — our inference, not a vendor statement

Affected range stops below 7.1(5)n1(1b), so it looks safe — our inference, not a vendor statement

Affected range stops below 7.2(0)d1(1), so it looks safe — our inference, not a vendor statement

Affected range stops below 7.3(4)n1(1a), so it looks safe — our inference, not a vendor statement

Affected range stops below 8.1(1), so it looks safe — our inference, not a vendor statement

cisco-7000-10-slot (environment) · cisco-7000-18-slot (environment) · cisco-7000-4-slot (environment) · cisco-7000-9-slot (environment) · cisco-7700-10-slot (environment) · cisco-7700-18-slot (environment) · cisco-7700-2-slot (environment) · cisco-7700-6-slot (environment) · cisco-9432pq (environment) · cisco-9536pq (environment) · cisco-9636pq (environment) · cisco-9736pq (environment) · cisco-mds-9132t (environment) · cisco-mds-9148s (environment) · cisco-mds-9148t (environment) · cisco-mds-9216 (environment) · cisco-mds-9216a (environment) · cisco-mds-9216i (environment) · cisco-mds-9222i (environment) · cisco-mds-9250i (environment) · cisco-mds-9396s (environment) · cisco-mds-9396t (environment) · cisco-mds-9506 (environment) · cisco-mds-9509 (environment) · cisco-mds-9513 (environment) · cisco-mds-9706 (environment) · cisco-mds-9710 (environment) · cisco-mds-9718 (environment) · cisco-n77-f312ck-26 (environment) · cisco-n77-f324fq-25 (environment) · cisco-n77-f348xp-23 (environment) · cisco-n77-f430cq-36 (environment) · cisco-n77-m312cq-26l (environment) · cisco-n77-m324fq-25l (environment) · cisco-n77-m348xp-23l (environment) · cisco-n7k-f248xp-25e (environment) · cisco-n7k-f306ck-25 (environment) · cisco-n7k-f312fq-25 (environment) · cisco-n7k-m202cf-22l (environment) · cisco-n7k-m206fq-23l (environment) · cisco-n7k-m224xp-23l (environment) · cisco-n7k-m324fq-25l (environment) · cisco-n7k-m348xp-25l (environment) · cisco-n9k-c9504-fm-r (environment) · cisco-n9k-c9508-fm-r (environment) · cisco-n9k-x9432c-s (environment) · cisco-n9k-x9464px (environment) · cisco-n9k-x9464tx2 (environment) · cisco-n9k-x9564px (environment) · cisco-n9k-x9564tx (environment) · cisco-n9k-x96136yc-r (environment) · cisco-n9k-x9636c-r (environment) · cisco-n9k-x9636c-rx (environment) · cisco-n9k-x9636q-r (environment) · cisco-n9k-x97160yc-ex (environment) · cisco-n9k-x9732c-ex (environment) · cisco-n9k-x9732c-fx (environment) · cisco-n9k-x9736c-ex (environment) · cisco-n9k-x9736c-fx (environment) · cisco-n9k-x9788tc-fx (environment) · cisco-nexus-1000v (environment) · cisco-nexus-3048 (environment) · cisco-nexus-31108pc-v (environment) · cisco-nexus-31108tc-v (environment) · cisco-nexus-31128pq (environment) · cisco-nexus-3132c-z (environment) · cisco-nexus-3132q-v (environment) · cisco-nexus-3132q-x-3132q-xl (environment) · cisco-nexus-3164q (environment) · cisco-nexus-3172pq-pq-xl (environment) · cisco-nexus-3172tq-xl (environment) · cisco-nexus-3232c (environment) · cisco-nexus-3264c-e (environment) · cisco-nexus-3264q (environment) · cisco-nexus-3408-s (environment) · cisco-nexus-34180yc (environment) · cisco-nexus-3432d-s (environment) · cisco-nexus-3464c (environment) · cisco-nexus-3524-x-xl (environment) · cisco-nexus-3548-x-xl (environment) · cisco-nexus-36180yc-r (environment) · cisco-nexus-3636c-r (environment) · cisco-nexus-5010 (environment) · cisco-nexus-5020 (environment) · cisco-nexus-5548p (environment) · cisco-nexus-5548up (environment) · cisco-nexus-5596t (environment) · cisco-nexus-5596up (environment) · cisco-nexus-56128p (environment) · cisco-nexus-5624q (environment) · cisco-nexus-5648q (environment) · cisco-nexus-5672up (environment) · cisco-nexus-5672up-16g (environment) · cisco-nexus-5696q (environment) · cisco-nexus-6001 (environment) · cisco-nexus-6004 (environment) · cisco-nexus-7000-supervisor-1 (environment) · cisco-nexus-7000-supervisor-2 (environment) · cisco-nexus-7000-supervisor-2e (environment) · cisco-nexus-7700-supervisor-2e (environment) · cisco-nexus-7700-supervisor-3e (environment) · cisco-nexus-92160yc-x (environment) · cisco-nexus-92300yc (environment) · cisco-nexus-93108tc-ex (environment) · cisco-nexus-93108tc-fx (environment) · cisco-nexus-93120tx (environment) · cisco-nexus-9316d-gx (environment) · cisco-nexus-93180lc-ex (environment) · cisco-nexus-93180yc-ex (environment) · cisco-nexus-93180yc-fx (environment) · cisco-nexus-93216tc-fx2 (environment) · cisco-nexus-93240yc-fx2 (environment) · cisco-nexus-9332c (environment) · cisco-nexus-93360yc-fx2 (environment) · cisco-nexus-9336c-fx2 (environment) · cisco-nexus-9348gc-fxp (environment) · cisco-nexus-93600cd-gx (environment) · cisco-nexus-9364c (environment) · cisco-nexus-9500-supervisor-a (environment) · cisco-nexus-9500-supervisor-b (environment) · cisco-nexus-9504 (environment) · cisco-nexus-9508 (environment) · cisco-nexus-9516 (environment) · cisco-x96136yc-r (environment) · cisco-x9636c-r (environment) · cisco-x9636c-rx (environment) · cisco-x9636q-r (environment)

7000 10-Slot · Ciscodevice

80%

All versions

7000 18-Slot · Ciscodevice

80%

All versions

7000 4-Slot · Ciscodevice

80%

All versions

7000 9-Slot · Ciscodevice

80%

All versions