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Fencer Vulns
high 7.8

CVE-2019-1601 json

Cisco NX-OS Software Unauthorized Filesystem Access Vulnerability

published 2019-03-08 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-10158

cvss
7.8
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 34%
public exploits
0
none known

Summary

A vulnerability in the filesystem permissions of Cisco NX-OS Software could allow an authenticated, local attacker to gain read and write access to a critical configuration file. The vulnerability is due to a failure to impose strict filesystem permissions on the targeted device. An attacker could exploit this vulnerability by accessing and modifying restricted files. A successful exploit could allow an attacker to use the content of this configuration file to bypass authentication and log in as any user of the device. MDS 9000 Series Multilayer Switches are affected in versions prior to 6.2(25), 8.1(1b), and 8.3(1). Nexus 3000 Series Switches are affected in versions prior to 7.0(3)I4(9) and 7.0(3)I7(4). Nexus 3500 Platform Switches are affected in versions prior to 6.0(2)A8(10) and 7.0(3)I7(4). Nexus 3600 Platform Switches are affected in versions prior to 7.0(3)F3(5). Nexus 2000, 5500, 5600, and 6000 Series Switches are affected in versions prior to 7.1(5)N1(1b) and 7.3(3)N1(1). Nexus 7000 and 7700 Series Switches are affected in versions prior to 6.2(22), 7.3(3)D1(1), and 8.2(3). Nexus 9000 Series Switches-Standalone are affected in 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 in versions prior to 7.0(3)F3(5).

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 2000, 5500, 5600, and 6000 Series Switches 7.1(5)N1(1b), 7.3(3)N1(1)
  • Cisco Nexus 7000 and 7700 Series Switches 6.2(22), 7.3(3)D1(1), 8.2(3)
  • Cisco Nexus 9000 Series Switches-Standalone 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)

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
23 mo ago

Exploit prediction

0.40% chance of exploitation in the next 30 days, higher than 34% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.0 7.8 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C

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 2000, 5500, 5600, and 6000 Series Switches
  • Cisco Nexus 7000 and 7700 Series Switches
  • Cisco Nexus 9000 Series Switches-Standalone
  • Cisco Nexus 9500 R-Series Line Cards and Fabric Modules

Classification

Weakness
  • CWE-284 Improper Access Control
  • CWE-732 Incorrect Permission Assignment for Critical Resource

References

Sources

Fencer Vulns 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.