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Fencer Intel
high 8.6

CVE-2019-1616 json

Cisco NX-OS Software Cisco Fabric Services Denial of Service Vulnerability

published 7y ago modified 4mo ago also EUVD-2019-10173

cvss
8.6
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.4%
EPSS 2.4% chance of exploitation in 30 days, percentile 84%
public exploits
0
none known

Summary

A vulnerability in the Cisco Fabric Services component of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a buffer overflow, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient validation of Cisco Fabric Services packets. An attacker could exploit this vulnerability by sending a crafted Cisco Fabric Services packet to an affected device. A successful exploit could allow the attacker to cause a buffer overflow, resulting in process crashes and a DoS condition on the device. MDS 9000 Series Multilayer Switches are affected running software versions prior to 6.2(25), 8.1(1b), 8.3(1). Nexus 3000 Series Switches are affected running software versions prior to 7.0(3)I4(9) and 7.0(3)I7(4). Nexus 3500 Platform Switches are affected running software versions prior to 6.0(2)A8(10) and 7.0(3)I7(4). Nexus 3600 Platform Switches are affected running software versions prior to 7.0(3)F3(5) Nexus 7000 and 7700 Series Switches are affected running software versions prior to 6.2(22) and 8.2(3). Nexus 9000 Series Switches in Standalone NX-OS Mode are affected running software versions prior to 7.0(3)I4(9) and 7.0(3)I7(4). Nexus 9500 R-Series Line Cards and Fabric Modules are affected running software versions prior to 7.0(3)F3(5). UCS 6200, 6300, and 6400 Fabric Interconnects are affected running software versions prior to 3.2(3j) and 4.0(2a).

Patch / fix

  • Cisco MDS 9000 Series Multilayer Switches 6.2(25), 8.1(1b), 8.3(1)
  • Cisco Nexus 3000 Series Switches 7.0(3)I4(9), 7.0(3)I7(4)
  • Cisco Nexus 3500 Platform Switches 6.0(2)A8(10), 7.0(3)I7(4)
  • Cisco Nexus 3600 Platform Switches 7.0(3)F3(5)
  • Cisco Nexus 7000 and 7700 Series Switches 6.2(22), 8.2(3)
  • Cisco Nexus 9000 Series Switches in Standalone NX-OS Mode 7.0(3)I4(9), 7.0(3)I7(4)
  • Cisco Nexus 9500 R-Series Line Cards and Fabric Modules 7.0(3)F3(5)
  • Cisco UCS 6200, 6300, and 6400 Fabric Interconnects 3.2(3j), 4.0(2a)

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CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
last yr.

Exploit prediction

2.44% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.0 8.6 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • Cisco MDS 9000 Series Multilayer Switches
  • Cisco Nexus 3000 Series Switches
  • Cisco Nexus 3500 Platform Switches
  • Cisco Nexus 3600 Platform Switches
  • Cisco Nexus 7000 and 7700 Series Switches
  • Cisco Nexus 9000 Series Switches in Standalone NX-OS Mode
  • Cisco Nexus 9500 R-Series Line Cards and Fabric Modules
  • Cisco UCS 6200, 6300, and 6400 Fabric Interconnects

Classification

Weakness
  • CWE-20 Improper Input Validation
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.