CVE-2024-20388 [Medium] | Security Vulnerability in Firepower Management Center

A vulnerability in the password change feature of Cisco Firepower Management Center (FMC) software could allow an unauthenticated, remote attacker to determine valid user names on an affected device. This vulnerability is due to improper authentication of password update responses. An attacker could exploit this vulnerability by forcing a password reset on an affected device. A successful exploit could allow the attacker to determine valid user names in the unauthenticated response to a forced password reset.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.74%	0.44%	-0.30%
2	2026-03-14	0.54%	0.74%	+0.19%
3	2025-12-15	—	0.54%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.74%

0.44%

-0.30%

2026-03-14

0.54%

0.74%

+0.19%

2025-12-15

—

0.54%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
5.3	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. 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:N) No account or special rights needed—anonymous or random user is enough. 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:L) Some sensitive info could get out, but not a total data dump. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:N) Service keeps running; no real outage angle.	3.9	1.4	[email protected]
5.3	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. 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:N) No account or special rights needed—anonymous or random user is enough. 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:L) Some sensitive info could get out, but not a total data dump. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:N) Service keeps running; no real outage angle.	3.9	1.4	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

5.3

3.1

MEDIUM

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

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
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:N): No account or special rights needed—anonymous or random user is enough.
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:L): Some sensitive info could get out, but not a total data dump.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:N): Service keeps running; no real outage angle.

3.9

1.4

[email protected]

5.3

3.1

MEDIUM

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

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
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:N): No account or special rights needed—anonymous or random user is enough.
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:L): Some sensitive info could get out, but not a total data dump.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:N): Service keeps running; no real outage angle.

3.9

1.4

[email protected]

Affected software / configurations for CVE-2024-20388

References for CVE-2024-20388

URL	Tags
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-xss-infodisc-RL4mJFer	Vendor Advisory

URL

CVE-2024-20388

Exploit prediction scoring system (EPSS) score for CVE-2024-20388

Common vulnerability scoring system (CVSS) metrics for CVE-2024-20388

Weakness enumeration for CVE-2024-20388

Affected software / configurations for CVE-2024-20388

References for CVE-2024-20388

Vendor	Product	Version	Raw CPE
cisco	firepower_management_center	6.4.0.17	cpe:2.3:a:cisco:firepower_management_center:6.4.0.17:::::::*
cisco	firepower_management_center	6.4.0.18	cpe:2.3:a:cisco:firepower_management_center:6.4.0.18:::::::*
cisco	firepower_management_center	6.6.7.2	cpe:2.3:a:cisco:firepower_management_center:6.6.7.2:::::::*
cisco	firepower_management_center	7.0.6.1	cpe:2.3:a:cisco:firepower_management_center:7.0.6.1:::::::*
cisco	firepower_management_center	7.0.6.2	cpe:2.3:a:cisco:firepower_management_center:7.0.6.2:::::::*
cisco	firepower_management_center	7.2.5.1	cpe:2.3:a:cisco:firepower_management_center:7.2.5.1:::::::*
cisco	firepower_management_center	7.2.5.2	cpe:2.3:a:cisco:firepower_management_center:7.2.5.2:::::::*
cisco	firepower_management_center	7.2.6	cpe:2.3:a:cisco:firepower_management_center:7.2.6:::::::*
cisco	firepower_management_center	7.2.7	cpe:2.3:a:cisco:firepower_management_center:7.2.7:::::::*
cisco	firepower_management_center	7.2.8	cpe:2.3:a:cisco:firepower_management_center:7.2.8:::::::*
cisco	firepower_management_center	7.2.8.1	cpe:2.3:a:cisco:firepower_management_center:7.2.8.1:::::::*
cisco	firepower_management_center	7.4.0	cpe:2.3:a:cisco:firepower_management_center:7.4.0:::::::*
cisco	firepower_management_center	7.4.1	cpe:2.3:a:cisco:firepower_management_center:7.4.1:::::::*
cisco	firepower_management_center	7.4.1.1	cpe:2.3:a:cisco:firepower_management_center:7.4.1.1:::::::*
cisco	secure_firewall_management_center	6.2.3	cpe:2.3:a:cisco:secure_firewall_management_center:6.2.3:::::::*
cisco	secure_firewall_management_center	6.2.3.1	cpe:2.3:a:cisco:secure_firewall_management_center:6.2.3.1:::::::*
cisco	secure_firewall_management_center	6.2.3.2	cpe:2.3:a:cisco:secure_firewall_management_center:6.2.3.2:::::::*
cisco	secure_firewall_management_center	6.2.3.3	cpe:2.3:a:cisco:secure_firewall_management_center:6.2.3.3:::::::*
cisco	secure_firewall_management_center	6.2.3.4	cpe:2.3:a:cisco:secure_firewall_management_center:6.2.3.4:::::::*
cisco	secure_firewall_management_center	6.2.3.5	cpe:2.3:a:cisco:secure_firewall_management_center:6.2.3.5:::::::*
cisco	secure_firewall_management_center	6.2.3.6	cpe:2.3:a:cisco:secure_firewall_management_center:6.2.3.6:::::::*
cisco	secure_firewall_management_center	6.2.3.7	cpe:2.3:a:cisco:secure_firewall_management_center:6.2.3.7:::::::*
cisco	secure_firewall_management_center	6.2.3.8	cpe:2.3:a:cisco:secure_firewall_management_center:6.2.3.8:::::::*
cisco	secure_firewall_management_center	6.2.3.9	cpe:2.3:a:cisco:secure_firewall_management_center:6.2.3.9:::::::*
cisco	secure_firewall_management_center	6.2.3.10	cpe:2.3:a:cisco:secure_firewall_management_center:6.2.3.10:::::::*
cisco	secure_firewall_management_center	6.2.3.11	cpe:2.3:a:cisco:secure_firewall_management_center:6.2.3.11:::::::*
cisco	secure_firewall_management_center	6.2.3.12	cpe:2.3:a:cisco:secure_firewall_management_center:6.2.3.12:::::::*
cisco	secure_firewall_management_center	6.2.3.13	cpe:2.3:a:cisco:secure_firewall_management_center:6.2.3.13:::::::*
cisco	secure_firewall_management_center	6.2.3.14	cpe:2.3:a:cisco:secure_firewall_management_center:6.2.3.14:::::::*
cisco	secure_firewall_management_center	6.2.3.15	cpe:2.3:a:cisco:secure_firewall_management_center:6.2.3.15:::::::*
cisco	secure_firewall_management_center	6.2.3.16	cpe:2.3:a:cisco:secure_firewall_management_center:6.2.3.16:::::::*
cisco	secure_firewall_management_center	6.2.3.17	cpe:2.3:a:cisco:secure_firewall_management_center:6.2.3.17:::::::*
cisco	secure_firewall_management_center	6.2.3.18	cpe:2.3:a:cisco:secure_firewall_management_center:6.2.3.18:::::::*
cisco	secure_firewall_management_center	6.4.0	cpe:2.3:a:cisco:secure_firewall_management_center:6.4.0:::::::*
cisco	secure_firewall_management_center	6.4.0.1	cpe:2.3:a:cisco:secure_firewall_management_center:6.4.0.1:::::::*
cisco	secure_firewall_management_center	6.4.0.2	cpe:2.3:a:cisco:secure_firewall_management_center:6.4.0.2:::::::*
cisco	secure_firewall_management_center	6.4.0.3	cpe:2.3:a:cisco:secure_firewall_management_center:6.4.0.3:::::::*
cisco	secure_firewall_management_center	6.4.0.4	cpe:2.3:a:cisco:secure_firewall_management_center:6.4.0.4:::::::*
cisco	secure_firewall_management_center	6.4.0.5	cpe:2.3:a:cisco:secure_firewall_management_center:6.4.0.5:::::::*
cisco	secure_firewall_management_center	6.4.0.6	cpe:2.3:a:cisco:secure_firewall_management_center:6.4.0.6:::::::*
cisco	secure_firewall_management_center	6.4.0.7	cpe:2.3:a:cisco:secure_firewall_management_center:6.4.0.7:::::::*
cisco	secure_firewall_management_center	6.4.0.8	cpe:2.3:a:cisco:secure_firewall_management_center:6.4.0.8:::::::*
cisco	secure_firewall_management_center	6.4.0.9	cpe:2.3:a:cisco:secure_firewall_management_center:6.4.0.9:::::::*
cisco	secure_firewall_management_center	6.4.0.10	cpe:2.3:a:cisco:secure_firewall_management_center:6.4.0.10:::::::*
cisco	secure_firewall_management_center	6.4.0.11	cpe:2.3:a:cisco:secure_firewall_management_center:6.4.0.11:::::::*
cisco	secure_firewall_management_center	6.4.0.12	cpe:2.3:a:cisco:secure_firewall_management_center:6.4.0.12:::::::*
cisco	secure_firewall_management_center	6.4.0.13	cpe:2.3:a:cisco:secure_firewall_management_center:6.4.0.13:::::::*
cisco	secure_firewall_management_center	6.4.0.14	cpe:2.3:a:cisco:secure_firewall_management_center:6.4.0.14:::::::*
cisco	secure_firewall_management_center	6.4.0.15	cpe:2.3:a:cisco:secure_firewall_management_center:6.4.0.15:::::::*
cisco	secure_firewall_management_center	6.4.0.16	cpe:2.3:a:cisco:secure_firewall_management_center:6.4.0.16:::::::*
cisco	secure_firewall_management_center	6.6.0	cpe:2.3:a:cisco:secure_firewall_management_center:6.6.0:::::::*
cisco	secure_firewall_management_center	6.6.0.1	cpe:2.3:a:cisco:secure_firewall_management_center:6.6.0.1:::::::*
cisco	secure_firewall_management_center	6.6.1	cpe:2.3:a:cisco:secure_firewall_management_center:6.6.1:::::::*
cisco	secure_firewall_management_center	6.6.3	cpe:2.3:a:cisco:secure_firewall_management_center:6.6.3:::::::*
cisco	secure_firewall_management_center	6.6.4	cpe:2.3:a:cisco:secure_firewall_management_center:6.6.4:::::::*
cisco	secure_firewall_management_center	6.6.5	cpe:2.3:a:cisco:secure_firewall_management_center:6.6.5:::::::*
cisco	secure_firewall_management_center	6.6.5.1	cpe:2.3:a:cisco:secure_firewall_management_center:6.6.5.1:::::::*
cisco	secure_firewall_management_center	6.6.5.2	cpe:2.3:a:cisco:secure_firewall_management_center:6.6.5.2:::::::*
cisco	secure_firewall_management_center	6.6.7	cpe:2.3:a:cisco:secure_firewall_management_center:6.6.7:::::::*
cisco	secure_firewall_management_center	6.6.7.1	cpe:2.3:a:cisco:secure_firewall_management_center:6.6.7.1:::::::*
cisco	secure_firewall_management_center	6.7.0	cpe:2.3:a:cisco:secure_firewall_management_center:6.7.0:::::::*
cisco	secure_firewall_management_center	6.7.0.1	cpe:2.3:a:cisco:secure_firewall_management_center:6.7.0.1:::::::*
cisco	secure_firewall_management_center	6.7.0.2	cpe:2.3:a:cisco:secure_firewall_management_center:6.7.0.2:::::::*
cisco	secure_firewall_management_center	6.7.0.3	cpe:2.3:a:cisco:secure_firewall_management_center:6.7.0.3:::::::*
cisco	secure_firewall_management_center	7.0.0	cpe:2.3:a:cisco:secure_firewall_management_center:7.0.0:::::::*
cisco	secure_firewall_management_center	7.0.0.1	cpe:2.3:a:cisco:secure_firewall_management_center:7.0.0.1:::::::*
cisco	secure_firewall_management_center	7.0.1	cpe:2.3:a:cisco:secure_firewall_management_center:7.0.1:::::::*
cisco	secure_firewall_management_center	7.0.1.1	cpe:2.3:a:cisco:secure_firewall_management_center:7.0.1.1:::::::*
cisco	secure_firewall_management_center	7.0.2	cpe:2.3:a:cisco:secure_firewall_management_center:7.0.2:::::::*
cisco	secure_firewall_management_center	7.0.2.1	cpe:2.3:a:cisco:secure_firewall_management_center:7.0.2.1:::::::*
cisco	secure_firewall_management_center	7.0.3	cpe:2.3:a:cisco:secure_firewall_management_center:7.0.3:::::::*
cisco	secure_firewall_management_center	7.0.4	cpe:2.3:a:cisco:secure_firewall_management_center:7.0.4:::::::*
cisco	secure_firewall_management_center	7.0.5	cpe:2.3:a:cisco:secure_firewall_management_center:7.0.5:::::::*
cisco	secure_firewall_management_center	7.0.6	cpe:2.3:a:cisco:secure_firewall_management_center:7.0.6:::::::*
cisco	secure_firewall_management_center	7.1.0	cpe:2.3:a:cisco:secure_firewall_management_center:7.1.0:::::::*
cisco	secure_firewall_management_center	7.1.0.1	cpe:2.3:a:cisco:secure_firewall_management_center:7.1.0.1:::::::*
cisco	secure_firewall_management_center	7.1.0.2	cpe:2.3:a:cisco:secure_firewall_management_center:7.1.0.2:::::::*
cisco	secure_firewall_management_center	7.1.0.3	cpe:2.3:a:cisco:secure_firewall_management_center:7.1.0.3:::::::*
cisco	secure_firewall_management_center	7.2.0	cpe:2.3:a:cisco:secure_firewall_management_center:7.2.0:::::::*
cisco	secure_firewall_management_center	7.2.0.1	cpe:2.3:a:cisco:secure_firewall_management_center:7.2.0.1:::::::*