CVE-2020-5735 [Exploited] | Amcrest 1080-Lite 8ch Firmware Memory Corruption

CVE-2020-5735 is rated Critical Active Threat (93.7/100): CVSS High severity, with high exploitation likelihood (EPSS 49.54%, 98th percentile). CISA KEV confirms active exploitation (added 2021-11-03) affecting Amcrest / Cameras and Network Video Recorder (NVR). a weakness (CWE-121) Unauthenticated remote administrative access may be possible. The CISA remediation deadline has passed—treat as an emergency patch priority.

EDB-ID	Source	Kind	Published	Link
48304	exploit_db	edb	2020-04-08	Exploit-DB ↗
—	nvd_ref	exploit_tag		Exploit-DB ↗

EDB-ID

Source

Kind

Published

Link

48304

exploit_db

edb

2020-04-08

Exploit-DB ↗

—

nvd_ref

exploit_tag

Exploit-DB ↗

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-05-15	50.26%	49.54%	-0.71%
2	2026-05-10	53.52%	50.26%	-3.26%
3	2026-04-15	—	53.52%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-05-15

50.26%

49.54%

-0.71%

2026-05-10

53.52%

50.26%

-3.26%

2026-04-15

—

53.52%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
8.8	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:L/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: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: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.	2.8	5.9	[email protected]
8.8	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:L/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: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: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.	2.8	5.9	134c704f-9b21-4f2e-91b3-4a467353bcc0
8.0	2.0	HIGH	`AV:N/AC:L/Au:S/C:P/I:P/A:C` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:L) Exploitation conditions are straightforward and predictable. Authentication (AU:S) A single authentication is required. Confidentiality impact (C:P) Partial confidentiality impact. Integrity impact (I:P) Partial integrity impact. Availability impact (A:C) Complete availability impact.	8.0	8.5	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

8.8

3.1

HIGH

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

2.8

5.9

[email protected]

8.8

3.1

HIGH

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

2.8

5.9

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

8.0

2.0

HIGH

AV:N/AC:L/Au:S/C:P/I:P/A:C Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:L): Exploitation conditions are straightforward and predictable.
Authentication (AU:S): A single authentication is required.
Confidentiality impact (C:P): Partial confidentiality impact.
Integrity impact (I:P): Partial integrity impact.
Availability impact (A:C): Complete availability impact.

8.0

8.5

[email protected]

Affected software / configurations for CVE-2020-5735

Vendor	Product	Version	Raw CPE
amcrest	1080-lite_8ch_firmware	—	cpe:2.3:o:amcrest:1080-lite_8ch_firmware:-:::::::*
amcrest	amdv10814-h5_firmware	—	cpe:2.3:o:amcrest:amdv10814-h5_firmware:-:::::::*
amcrest	ipm-721_firmware	< v2.420.ac00.18.r.20200217	cpe:2.3:o:amcrest:ipm-721_firmware::::::::
amcrest	ip2m-841_firmware	< v2.420.ac00.18.r.20200217	cpe:2.3:o:amcrest:ip2m-841_firmware::::::::
amcrest	ip2m-841-v3_firmware	< v2.800.0000000.6.r.200314	cpe:2.3:o:amcrest:ip2m-841-v3_firmware::::::::
amcrest	ip2m-853ew_firmware	< v2.623.00ac004.0.r.200316	cpe:2.3:o:amcrest:ip2m-853ew_firmware::::::::
amcrest	ip2m-858w_firmware	< v2.623.00ac004.0.r.200316	cpe:2.3:o:amcrest:ip2m-858w_firmware::::::::
amcrest	ip2m-866w_firmware	< v2.623.00ac004.0.r.200316	cpe:2.3:o:amcrest:ip2m-866w_firmware::::::::
amcrest	ip2m-866ew_firmware	< v2.623.00ac004.0.r.200316	cpe:2.3:o:amcrest:ip2m-866ew_firmware::::::::
amcrest	ip4m-1053ew_firmware	< v2.623.00ac004.0.r.200316	cpe:2.3:o:amcrest:ip4m-1053ew_firmware::::::::
amcrest	ip8m-2454ew_firmware	< v2.622.00ac000.0.r.200320	cpe:2.3:o:amcrest:ip8m-2454ew_firmware::::::::
amcrest	ip8m-2493eb_firmware	< v2.622.00ac000.0.r.200320	cpe:2.3:o:amcrest:ip8m-2493eb_firmware::::::::
amcrest	ip8m-2496eb_firmware	< v2.622.00ac000.0.r.200320	cpe:2.3:o:amcrest:ip8m-2496eb_firmware::::::::
amcrest	ip8m-2597e_firmware	< v2.800.00ac000.0.r.200330	cpe:2.3:o:amcrest:ip8m-2597e_firmware::::::::
amcrest	ip8m-mb2546ew_firmware	< v2.622.00ac000.0.r.200320	cpe:2.3:o:amcrest:ip8m-mb2546ew_firmware::::::::
amcrest	ip8m-mt2544ew_firmware	< v2.622.00ac000.0.r.200320	cpe:2.3:o:amcrest:ip8m-mt2544ew_firmware::::::::
amcrest	ip8m-t2499ew_firmware	< v2.622.00ac000.0.r.200320	cpe:2.3:o:amcrest:ip8m-t2499ew_firmware::::::::
amcrest	ipm-hx1_firmware	< v2.420.ac00.18.r.20200217	cpe:2.3:o:amcrest:ipm-hx1_firmware::::::::

References for CVE-2020-5735

URL	Tags
http://packetstormsecurity.com/files/157164/Amcrest-Dahua-NVR-Camera-IP2M-841-Denial-Of-Service.html	Exploit Third Party Advisory VDB Entry
https://www.tenable.com/security/research/tra-2020-20	Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-5735	US Government Resource

URL

CVE-2020-5735

CISA KEV Record for CVE-2020-5735

Public exploit references (Exploit-DB) for CVE-2020-5735

Exploit prediction scoring system (EPSS) score for CVE-2020-5735

Common vulnerability scoring system (CVSS) metrics for CVE-2020-5735

Weakness enumeration for CVE-2020-5735

Affected software / configurations for CVE-2020-5735

References for CVE-2020-5735