CVE-2021-35244 [Medium] | File Upload / RCE in Orion Platform

CVE-2021-35244 is rated Moderate Risk (54.4/100): CVSS Medium severity, with high exploitation likelihood (EPSS 5.77%, 92th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	34.87%	5.77%	-29.10%
2	2026-05-26	23.95%	34.87%	+10.92%
3	2026-03-14	—	23.95%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

34.87%

5.77%

-29.10%

2026-05-26

23.95%

34.87%

+10.92%

2026-03-14

—

23.95%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
6.8	3.1	MEDIUM	`CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:L` Click to expand Attack vector (AV:A) Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet. Attack complexity (AC:H) Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work. 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:C) Breaking this can reach past the original component and bite other resources—bigger blast radius. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:L) Attackers could change some data, but it’s limited—not everything goes. Availability (A:L) Might cause slowdowns, glitches, or partial disruption—not a full brick.	1.0	5.3	[email protected]
7.2	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:H/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: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.	1.2	5.9	[email protected]
8.5	2.0	HIGH	`AV:N/AC:M/Au:S/C:C/I:C/A:C` 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:C) Complete confidentiality impact. Integrity impact (I:C) Complete integrity impact. Availability impact (A:C) Complete availability impact.	6.8	10.0	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

6.8

3.1

MEDIUM

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

Attack vector (AV:A): Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
Attack complexity (AC:H): Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
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:C): Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:L): Attackers could change some data, but it’s limited—not everything goes.
Availability (A:L): Might cause slowdowns, glitches, or partial disruption—not a full brick.

1.0

5.3

[email protected]

7.2

3.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:H/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: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.

1.2

5.9

[email protected]

8.5

2.0

HIGH

AV:N/AC:M/Au:S/C:C/I:C/A:C 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:C): Complete confidentiality impact.
Integrity impact (I:C): Complete integrity impact.
Availability impact (A:C): Complete availability impact.

6.8

10.0

[email protected]

Affected software / configurations for CVE-2021-35244

Vendor	Product	Version	Raw CPE
solarwinds	orion_platform	< 2020.2.6	cpe:2.3:a:solarwinds:orion_platform::::::::
solarwinds	orion_platform	2020.2.6	cpe:2.3:a:solarwinds:orion_platform:2020.2.6:-::::::
solarwinds	orion_platform	2020.2.6	cpe:2.3:a:solarwinds:orion_platform:2020.2.6:hotfix1::::::
solarwinds	orion_platform	2020.2.6	cpe:2.3:a:solarwinds:orion_platform:2020.2.6:hotfix2::::::

References for CVE-2021-35244

URL	Tags
https://documentation.solarwinds.com/en/Success_Center/orionplatform/content/core-secure-configuration.htm	Vendor Advisory
https://support.solarwinds.com/SuccessCenter/s/article/Orion-Platform-2020-2-6-Hotfix-3?language=en_US	Release Notes Vendor Advisory
https://www.solarwinds.com/trust-center/security-advisories/cve-2021-35242	Not Applicable Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-22-375/	Third Party Advisory VDB Entry

URL

CVE-2021-35244 | Unrestricted File Upload Causing Remote Code Execution: Orion Platform 2020.2.6

Exploit prediction scoring system (EPSS) score for CVE-2021-35244

Common vulnerability scoring system (CVSS) metrics for CVE-2021-35244

Weakness enumeration for CVE-2021-35244

Affected software / configurations for CVE-2021-35244

References for CVE-2021-35244