CVE-2023-36897 [High] | Input Validation Bypass in 365 Apps

CVE-2023-36897 is rated Moderate Risk (59.3/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.60%). EPSS rose +1.45% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.16%	1.60%	+1.45%
2	2025-11-21	1.06%	0.16%	-0.91%
3	2025-11-18	—	1.06%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.16%

1.60%

+1.45%

2025-11-21

1.06%

0.16%

-0.91%

2025-11-18

—

1.06%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
8.1	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/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: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:N) Service keeps running; no real outage angle.	2.8	5.2	[email protected]
6.5	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:N) Service keeps running; no real outage angle.	2.8	3.6	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

8.1

3.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/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: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:N): Service keeps running; no real outage angle.

2.8

5.2

[email protected]

6.5

3.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N): Service keeps running; no real outage angle.

2.8

3.6

[email protected]

Affected software / configurations for CVE-2023-36897

Vendor	Product	Version	Raw CPE
microsoft	365_apps	—	cpe:2.3:a:microsoft:365_apps:-::::enterprise::x64:*
microsoft	365_apps	—	cpe:2.3:a:microsoft:365_apps:-::::enterprise::x86:*
microsoft	office	2019	cpe:2.3:a:microsoft:office:2019::::::x64:
microsoft	office	2019	cpe:2.3:a:microsoft:office:2019::::::x86:
microsoft	office_long_term_servicing_channel	2021	cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021::::::x64:
microsoft	office_long_term_servicing_channel	2021	cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021::::::x86:
microsoft	visual_studio_2010_tools_for_office_runtime	—	cpe:2.3:a:microsoft:visual_studio_2010_tools_for_office_runtime:-:::::::*
microsoft	visual_studio_2017	>= 15.0, < 15.9.56	cpe:2.3:a:microsoft:visual_studio_2017::::::::
microsoft	visual_studio_2019	>= 16.0, < 16.11.29	cpe:2.3:a:microsoft:visual_studio_2019::::::::
microsoft	visual_studio_2022	>= 17.2.0, < 17.2.18	cpe:2.3:a:microsoft:visual_studio_2022::::::-::*
microsoft	visual_studio_2022	>= 17.4.0, < 17.4.10	cpe:2.3:a:microsoft:visual_studio_2022::::::-::*
microsoft	visual_studio_2022	>= 17.6.0, < 17.6.6	cpe:2.3:a:microsoft:visual_studio_2022::::::::

References for CVE-2023-36897

URL	Tags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36897	Patch Vendor Advisory

URL

CVE-2023-36897 | Visual Studio Tools for Office Runtime Spoofing Vulnerability

Exploit prediction scoring system (EPSS) score for CVE-2023-36897

Common vulnerability scoring system (CVSS) metrics for CVE-2023-36897

Weakness enumeration for CVE-2023-36897

Affected software / configurations for CVE-2023-36897

References for CVE-2023-36897