CVE-2021-21476 [Medium] | Security Vulnerability in Ui5

CVE-2021-21476 is rated Moderate Risk (43.1/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.82%). Review affected assets and schedule remediation.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.32%	0.82%	+0.49%
2	2025-03-30	0.37%	0.32%	-0.04%
3	2025-03-29	—	0.37%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.32%

0.82%

+0.49%

2025-03-30

0.37%

0.32%

-0.04%

2025-03-29

—

0.37%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
6.1	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. Scope (S:C) Breaking this can reach past the original component and bite other resources—bigger blast radius. Confidentiality (C:L) Some sensitive info could get out, but not a total data dump. Integrity (I:L) Attackers could change some data, but it’s limited—not everything goes. Availability (A:N) Service keeps running; no real outage angle.	2.8	2.7	[email protected]
4.7	3.0	MEDIUM	`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/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:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. Scope (S:C) Breaking this can reach past the original component and bite other resources—bigger blast radius. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:L) Attackers could change some data, but it’s limited—not everything goes. Availability (A:N) Service keeps running; no real outage angle.	2.8	1.4	[email protected]
5.8	2.0	MEDIUM	`AV:N/AC:M/Au:N/C:P/I:P/A:N` 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:N) No authentication is required. Confidentiality impact (C:P) Partial confidentiality impact. Integrity impact (I:P) Partial integrity impact. Availability impact (A:N) No availability impact.	8.6	4.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

6.1

3.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C): Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L): Some sensitive info could get out, but not a total data dump.
Integrity (I:L): Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N): Service keeps running; no real outage angle.

2.8

2.7

[email protected]

4.7

3.0

MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/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:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C): Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:L): Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N): Service keeps running; no real outage angle.

2.8

1.4

[email protected]

5.8

2.0

MEDIUM

AV:N/AC:M/Au:N/C:P/I:P/A:N 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:N): No authentication is required.
Confidentiality impact (C:P): Partial confidentiality impact.
Integrity impact (I:P): Partial integrity impact.
Availability impact (A:N): No availability impact.

8.6

4.9

[email protected]

Affected software / configurations for CVE-2021-21476

Vendor	Product	Version	Raw CPE
sap	ui5	< 1.38.49	cpe:2.3:a:sap:ui5::::::::
sap	ui5	>= 1.50.5, < 1.52.49	cpe:2.3:a:sap:ui5::::::::
sap	ui5	>= 1.60.1, < 1.60.34	cpe:2.3:a:sap:ui5::::::::
sap	ui5	>= 1.71.0, < 1.71.31	cpe:2.3:a:sap:ui5::::::::
sap	ui5	>= 1.78.0, < 1.78.18	cpe:2.3:a:sap:ui5::::::::
sap	ui5	>= 1.84.0, < 1.84.5	cpe:2.3:a:sap:ui5::::::::
sap	ui5	>= 1.85.0, < 1.85.4	cpe:2.3:a:sap:ui5::::::::
sap	ui5	>= 1.86.0, < 1.86.1	cpe:2.3:a:sap:ui5::::::::

References for CVE-2021-21476

URL	Tags
https://launchpad.support.sap.com/#/notes/3014303	Permissions Required Third Party Advisory
https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=568460543	Vendor Advisory

URL

CVE-2021-21476

Exploit prediction scoring system (EPSS) score for CVE-2021-21476

Common vulnerability scoring system (CVSS) metrics for CVE-2021-21476

Weakness enumeration for CVE-2021-21476

Affected software / configurations for CVE-2021-21476

References for CVE-2021-21476