CVE-2024-55955 [Medium] | Security Vulnerability in Deep Security Agent

An incorrect permissions assignment vulnerability in Trend Micro Deep Security 20.0 agents between versions 20.0.1-9400 and 20.0.1-23340 could allow a local attacker to escalate privileges on affected installations. Please note: an attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-05-29	0.04%	0.09%	+0.05%
2	2026-02-08	0.08%	0.04%	-0.04%
3	2026-02-01	—	0.08%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-05-29

0.04%

0.09%

+0.05%

2026-02-08

0.08%

0.04%

-0.04%

2026-02-01

—

0.08%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
6.7	3.1	MEDIUM	`CVSS:3.1/AV:L/AC:H/PR:L/UI:R/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:H) Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work. Privileges required (PR:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. 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]
7.3	3.1	HIGH	`CVSS:3.1/AV:L/AC:L/PR:L/UI:R/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:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. 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.	1.3	5.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

6.7

3.1

MEDIUM

CVSS:3.1/AV:L/AC:H/PR:L/UI:R/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:H): Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:L): A normal user session is enough; they don’t have to be admin.
User interaction (UI:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
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]

7.3

3.1

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/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:L): A normal user session is enough; they don’t have to be admin.
User interaction (UI:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
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.

1.3

5.9

[email protected]

Affected software / configurations for CVE-2024-55955

Vendor	Product	Version	Raw CPE
trendmicro	deep_security_agent	20.0.1	cpe:2.3:a:trendmicro:deep_security_agent:20.0.1:update12510:::long_term_support:::*
trendmicro	deep_security_agent	20.0.1	cpe:2.3:a:trendmicro:deep_security_agent:20.0.1:update14610:::long_term_support:::*
trendmicro	deep_security_agent	20.0.1	cpe:2.3:a:trendmicro:deep_security_agent:20.0.1:update17380:::long_term_support:::*
trendmicro	deep_security_agent	20.0.1	cpe:2.3:a:trendmicro:deep_security_agent:20.0.1:update19250:::long_term_support:::*
trendmicro	deep_security_agent	20.0.1	cpe:2.3:a:trendmicro:deep_security_agent:20.0.1:update21510:::long_term_support:::*
trendmicro	deep_security_agent	20.0.1	cpe:2.3:a:trendmicro:deep_security_agent:20.0.1:update9400:::long_term_support:::*

References for CVE-2024-55955

URL	Tags
https://success.trendmicro.com/en-US/solution/KA-0018571	Vendor Advisory

URL

CVE-2024-55955

Exploit prediction scoring system (EPSS) score for CVE-2024-55955

Common vulnerability scoring system (CVSS) metrics for CVE-2024-55955

Weakness enumeration for CVE-2024-55955

Affected software / configurations for CVE-2024-55955

References for CVE-2024-55955