CVE-2022-2471 [Critical] | Memory Corruption in Cs-C6n-A0-1c2wfr Firmware

Stack-based Buffer Overflow vulnerability in the EZVIZ Motion Detection component as used in camera models CS-CV248, CS-C6N-A0-1C2WFR, CS-DB1C-A0-1E2W2FR, CS-C6N-B0-1G2WF, CS-C3W-A0-3H4WFRL allows a remote attacker to execute remote code on the device. This issue affects: EZVIZ CS-CV248 versions prior to 5.2.3 build 220725. EZVIZ CS-C6N-A0-1C2WFR versions prior to 5.3.0 build 220428. EZVIZ CS-DB1C-A0-1E2W2FR versions prior to 5.3.0 build 220802. EZVIZ CS-C6N-B0-1G2WF versions prior to 5.3.0 build 220712. EZVIZ CS-C3W-A0-3H4WFRL versions prior to 5.3.5 build 220723.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.95%	1.19%	+0.23%
2	2026-02-22	0.84%	0.95%	+0.11%
3	2026-02-03	—	0.84%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.95%

1.19%

+0.23%

2026-02-22

0.84%

0.95%

+0.11%

2026-02-03

—

0.84%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
9.9	3.1	CRITICAL	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/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: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: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.	3.1	6.0	[email protected]
9.8	3.1	CRITICAL	`CVSS:3.1/AV:N/AC:L/PR:N/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: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: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.	3.9	5.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

9.9

3.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/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: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: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.

3.1

6.0

[email protected]

9.8

3.1

CRITICAL

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

3.9

5.9

[email protected]

Affected software / configurations for CVE-2022-2471

Vendor	Product	Version	Raw CPE
ezviz	cs-c6n-a0-1c2wfr_firmware	5.3.0	cpe:2.3:o:ezviz:cs-c6n-a0-1c2wfr_firmware:5.3.0:build201719::::::
ezviz	cs-db1c-a0-1e2w2fr_firmware	5.3.0	cpe:2.3:o:ezviz:cs-db1c-a0-1e2w2fr_firmware:5.3.0:build211208::::::
ezviz	cs-c6n-b0-1g2wf_firmware	5.3.0	cpe:2.3:o:ezviz:cs-c6n-b0-1g2wf_firmware:5.3.0:build210731::::::
ezviz	cs-c3w-a0-3h4wfrl_firmware	5.3.5	cpe:2.3:o:ezviz:cs-c3w-a0-3h4wfrl_firmware:5.3.5:build220120::::::
ezviz	cs-cv248_firmware	5.2.1	cpe:2.3:o:ezviz:cs-cv248_firmware:5.2.1:build180403::::::

References for CVE-2022-2471

URL	Tags
https://www.bitdefender.com/blog/labs/vulnerabilities-identified-in-ezviz-smart-cams	Third Party Advisory

URL

CVE-2022-2471 | Stack-Based Buffer Overflow Vulnerability in the EZVIZ Motion Detection component

Exploit prediction scoring system (EPSS) score for CVE-2022-2471

Common vulnerability scoring system (CVSS) metrics for CVE-2022-2471

Weakness enumeration for CVE-2022-2471

Affected software / configurations for CVE-2022-2471

References for CVE-2022-2471