CVE-2019-1600 [Medium] | Information Disclosure in Firepower Extensible Oper…

A vulnerability in the file system permissions of Cisco FXOS Software and Cisco NX-OS Software could allow an authenticated, local attacker to access sensitive information that is stored in the file system of an affected system. The vulnerability is due to improper implementation of file system permissions. An attacker could exploit this vulnerability by accessing and modifying restricted files. A successful exploit could allow the attacker to access sensitive and critical files. Firepower 4100 Series Next-Generation Firewalls are affected in versions prior to 2.2.2.91 and 2.3.1.110. Firepower 9300 Series Next-Generation Firewalls are affected in versions prior to 2.2.2.91 and 2.3.1.110. 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).

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.12%	0.38%	+0.26%
2	2025-03-30	0.16%	0.12%	-0.04%
3	2025-03-29	—	0.16%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.12%

0.38%

+0.26%

2025-03-30

0.16%

0.12%

-0.04%

2025-03-29

—

0.16%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
4.4	3.1	MEDIUM	`CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N` Click to expand Attack vector (AV:L) They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:H) They need powerful rights—admin, root, or similar—before this pays off. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:N) Service keeps running; no real outage angle.	0.8	3.6	[email protected]
6.7	3.0	MEDIUM	`CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H` Click to expand Attack vector (AV:L) They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:H) They need powerful rights—admin, root, or similar—before this pays off. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	0.8	5.9	[email protected]
2.1	2.0	LOW	`AV:L/AC:L/Au:N/C:P/I:N/A:N` Click to expand Access vector (AV:L) Requires local access to the target system. Access complexity (AC:L) Exploitation conditions are straightforward and predictable. Authentication (AU:N) No authentication is required. Confidentiality impact (C:P) Partial confidentiality impact. Integrity impact (I:N) No integrity impact. Availability impact (A:N) No availability impact.	3.9	2.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

4.4

3.1

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N Click to expand

Attack vector (AV:L): They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H): They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:N): Service keeps running; no real outage angle.

0.8

3.6

[email protected]

6.7

3.0

MEDIUM

CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Click to expand

Attack vector (AV:L): They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H): They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

0.8

5.9

[email protected]

2.1

2.0

LOW

AV:L/AC:L/Au:N/C:P/I:N/A:N Click to expand

Access vector (AV:L): Requires local access to the target system.
Access complexity (AC:L): Exploitation conditions are straightforward and predictable.
Authentication (AU:N): No authentication is required.
Confidentiality impact (C:P): Partial confidentiality impact.
Integrity impact (I:N): No integrity impact.
Availability impact (A:N): No availability impact.

3.9

2.9

[email protected]

Affected software / configurations for CVE-2019-1600

Vendor	Product	Version	Raw CPE
cisco	firepower_extensible_operating_system	>= 1.1, < 2.2.2.91	cpe:2.3:o:cisco:firepower_extensible_operating_system::::::::
cisco	firepower_extensible_operating_system	>= 2.3, < 2.3.1.110	cpe:2.3:o:cisco:firepower_extensible_operating_system::::::::
cisco	nx-os	>= 8.2, < 8.3\(1\)	cpe:2.3:o:cisco:nx-os::::::::
cisco	nx-os	>= 7.0\(3\)i5, < 7.0\(3\)i7\(4\)	cpe:2.3:o:cisco:nx-os::::::::
cisco	nx-os	>= 7.0\(3\), < 7.0\(3\)i7\(4\)	cpe:2.3:o:cisco:nx-os::::::::
cisco	nx-os	>= 7.0\(3\)f3, < 7.0\(3\)f3\(5\)	cpe:2.3:o:cisco:nx-os::::::::
cisco	nx-os	>= 7.2, < 7.3\(3\)n1\(1\)	cpe:2.3:o:cisco:nx-os::::::::
cisco	nx-os	>= 8.0, < 8.2\(3\)	cpe:2.3:o:cisco:nx-os::::::::
cisco	nx-os	>= 7.0\(3\)f1, < 7.0\(3\)f3\(5\)	cpe:2.3:o:cisco:nx-os::::::::
cisco	nx-os	>= 7.3, < 8.1\(1b\)	cpe:2.3:o:cisco:nx-os::::::::
cisco	nx-os	>= 5.2., < 6.2\(25\)	cpe:2.3:o:cisco:nx-os::::::::
cisco	nx-os	< 7.0\(3\)i4\(9\)	cpe:2.3:o:cisco:nx-os::::::::
cisco	nx-os	< 6.0\(2\)a8\(10\)	cpe:2.3:o:cisco:nx-os::::::::
cisco	nx-os	< 7.1\(5\)n1\(1b\)	cpe:2.3:o:cisco:nx-os::::::::
cisco	nx-os	>= 7.2, < 7.3\(3\)d1\(1\)	cpe:2.3:o:cisco:nx-os::::::::
cisco	nx-os	< 6.2\(22\)	cpe:2.3:o:cisco:nx-os::::::::

References for CVE-2019-1600

URL	Tags
http://www.securityfocus.com/bid/107399	Third Party Advisory VDB Entry
http://www.securityfocus.com/bid/107404	Third Party Advisory VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190306-nxos-directory	Patch Vendor Advisory

URL

CVE-2019-1600 | Cisco FXOS and NX-OS Software Unauthorized Directory Access Vulnerability

Exploit prediction scoring system (EPSS) score for CVE-2019-1600

Common vulnerability scoring system (CVSS) metrics for CVE-2019-1600

Weakness enumeration for CVE-2019-1600

Affected software / configurations for CVE-2019-1600

References for CVE-2019-1600