CVE-2022-36133 [Critical] | Authentication Bypass in Tm-C3500 Firmware

CVE-2022-36133 is rated Moderate Risk (56.9/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 0.37%). Review affected assets and schedule remediation.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2025-12-10	0.21%	0.37%	+0.16%
2	2025-12-06	0.09%	0.21%	+0.12%
3	2025-11-26	—	0.09%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2025-12-10

0.21%

0.37%

+0.16%

2025-12-06

0.09%

0.21%

+0.12%

2025-11-26

—

0.09%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
9.1	3.1	CRITICAL	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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:N) No account or special rights needed—anonymous or random user is enough. 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: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:H) Could take the service down hard or make it unusable for people who depend on it.	3.9	5.2	[email protected]
9.1	3.1	CRITICAL	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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:N) No account or special rights needed—anonymous or random user is enough. 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: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:H) Could take the service down hard or make it unusable for people who depend on it.	3.9	5.2	134c704f-9b21-4f2e-91b3-4a467353bcc0

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

9.1

3.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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:N): No account or special rights needed—anonymous or random user is enough.
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: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:H): Could take the service down hard or make it unusable for people who depend on it.

3.9

5.2

[email protected]

9.1

3.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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:N): No account or special rights needed—anonymous or random user is enough.
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: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:H): Could take the service down hard or make it unusable for people who depend on it.

3.9

5.2

134c704f-9b21-4f2e-91b3-4a467353bcc0

Affected software / configurations for CVE-2022-36133

Vendor	Product	Version	Raw CPE
epson	tm-c3500_firmware	wam31500	cpe:2.3:o:epson:tm-c3500_firmware:wam31500:::::::*
epson	tm-c3510_firmware	wam31500	cpe:2.3:o:epson:tm-c3510_firmware:wam31500:::::::*
epson	tm-c3520_firmware	wam31500	cpe:2.3:o:epson:tm-c3520_firmware:wam31500:::::::*
epson	tm-c7500_firmware	wam31500	cpe:2.3:o:epson:tm-c7500_firmware:wam31500:::::::*
epson	tm-c7500g_firmware	wam31500	cpe:2.3:o:epson:tm-c7500g_firmware:wam31500:::::::*
epson	tm-c7510_firmware	wam31500	cpe:2.3:o:epson:tm-c7510_firmware:wam31500:::::::*
epson	tm-c7510g_firmware	wam31500	cpe:2.3:o:epson:tm-c7510g_firmware:wam31500:::::::*
epson	tm-c7520_firmware	wam31500	cpe:2.3:o:epson:tm-c7520_firmware:wam31500:::::::*
epson	tm-c7520g_firmware	wam31500	cpe:2.3:o:epson:tm-c7520g_firmware:wam31500:::::::*

References for CVE-2022-36133

URL	Tags
https://download.epson-biz.com/epson/epson_public_document.php?name=Infomation_history.pdf	Vendor Advisory
https://download.epson-biz.com/modules/colorworks/	Product Vendor Advisory

URL

CVE-2022-36133

Exploit prediction scoring system (EPSS) score for CVE-2022-36133

Common vulnerability scoring system (CVSS) metrics for CVE-2022-36133

Weakness enumeration for CVE-2022-36133

Affected software / configurations for CVE-2022-36133

References for CVE-2022-36133