CVE-2020-4436 [High] | Memory Corruption in Aspera Application Platfo…

Certain IBM Aspera applications are vulnerable to buffer overflow after valid authentication, which could allow an attacker with intimate knowledge of the system to execute arbitrary code through a service. IBM X-Force ID: 180902.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-02-20	0.48%	0.36%	-0.12%
2	2026-01-09	0.19%	0.48%	+0.29%
3	2025-11-21	—	0.19%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-02-20

0.48%

0.36%

-0.12%

2026-01-09

0.19%

0.48%

+0.29%

2025-11-21

—

0.19%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.5	3.1	HIGH	`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H` 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: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: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.	1.6	5.9	[email protected]
8.8	3.0	HIGH	`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H` 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:L) A normal user session is enough; they don’t have to be admin. 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.	2.8	5.9	[email protected]
6.0	2.0	MEDIUM	`AV:N/AC:M/Au:S/C:P/I:P/A:P` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:M) Exploitation needs some favorable conditions, but not exceptional ones. Authentication (AU:S) A single authentication is required. Confidentiality impact (C:P) Partial confidentiality impact. Integrity impact (I:P) Partial integrity impact. Availability impact (A:P) Partial availability impact.	6.8	6.4	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

7.5

3.1

HIGH

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

1.6

5.9

[email protected]

8.8

3.0

HIGH

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H 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:L): A normal user session is enough; they don’t have to be admin.
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.

2.8

5.9

[email protected]

6.0

2.0

MEDIUM

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

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:M): Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:S): A single authentication is required.
Confidentiality impact (C:P): Partial confidentiality impact.
Integrity impact (I:P): Partial integrity impact.
Availability impact (A:P): Partial availability impact.

6.8

6.4

[email protected]

Affected software / configurations for CVE-2020-4436

Vendor	Product	Version	Raw CPE
ibm	aspera_application_platform_on_demand	<= 3.7.4	cpe:2.3:a:ibm:aspera_application_platform_on_demand::::::::
ibm	aspera_faspex_on_demand	<= 3.7.4	cpe:2.3:a:ibm:aspera_faspex_on_demand::::::::
ibm	aspera_high-speed_transfer_endpoint	<= 3.9.3	cpe:2.3:a:ibm:aspera_high-speed_transfer_endpoint::::::::
ibm	aspera_high-speed_transfer_server	<= 3.9.3	cpe:2.3:a:ibm:aspera_high-speed_transfer_server::::::::
ibm	aspera_high-speed_transfer_server_for_cloud_pak_for_integration	<= 3.9.10	cpe:2.3:a:ibm:aspera_high-speed_transfer_server_for_cloud_pak_for_integration::::::::
ibm	aspera_proxy_server	<= 1.4.3	cpe:2.3:a:ibm:aspera_proxy_server::::::::
ibm	aspera_server_on_demand	<= 3.7.4	cpe:2.3:a:ibm:aspera_server_on_demand::::::::
ibm	aspera_shares_on_demand	<= 3.7.4	cpe:2.3:a:ibm:aspera_shares_on_demand::::::::
ibm	aspera_streaming	<= 3.9.3	cpe:2.3:a:ibm:aspera_streaming::::::::
ibm	aspera_transfer_cluster_manager	<= 1.3.1	cpe:2.3:a:ibm:aspera_transfer_cluster_manager::::::::

References for CVE-2020-4436

URL	Tags
https://exchange.xforce.ibmcloud.com/vulnerabilities/180902	VDB Entry Vendor Advisory
https://www.ibm.com/support/pages/node/6221324	Vendor Advisory

URL

CVE-2020-4436

Exploit prediction scoring system (EPSS) score for CVE-2020-4436

Common vulnerability scoring system (CVSS) metrics for CVE-2020-4436

Weakness enumeration for CVE-2020-4436

Affected software / configurations for CVE-2020-4436

References for CVE-2020-4436