CVE-2017-7927 [High] | Security Bypass in Dh-Ipc-Hdbw23a0rn-Zs Firmware

A Use of Password Hash Instead of Password for Authentication issue was discovered in Dahua DH-IPC-HDBW23A0RN-ZS, DH-IPC-HDBW13A0SN, DH-IPC-HDW1XXX, DH-IPC-HDW2XXX, DH-IPC-HDW4XXX, DH-IPC-HFW1XXX, DH-IPC-HFW2XXX, DH-IPC-HFW4XXX, DH-SD6CXX, DH-NVR1XXX, DH-HCVR4XXX, DH-HCVR5XXX, DHI-HCVR51A04HE-S3, DHI-HCVR51A08HE-S3, and DHI-HCVR58A32S-S2 devices. The use of password hash instead of password for authentication vulnerability was identified, which could allow a malicious user to bypass authentication without obtaining the actual password.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-01-12	5.18%	1.74%	-3.45%
2	2025-09-21	1.74%	5.18%	+3.45%
3	2025-03-30	—	1.74%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-01-12

5.18%

1.74%

-3.45%

2025-09-21

1.74%

5.18%

+3.45%

2025-03-30

—

1.74%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.3	3.0	HIGH	`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L` 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:L) Some sensitive info could get out, but not a total data dump. 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.	3.9	3.4	[email protected]
7.5	2.0	HIGH	`AV:N/AC:L/Au:N/C:P/I:P/A:P` 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:N) No authentication is required. Confidentiality impact (C:P) Partial confidentiality impact. Integrity impact (I:P) Partial integrity impact. Availability impact (A:P) Partial availability impact.	10.0	6.4	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

7.3

3.0

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L 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:L): Some sensitive info could get out, but not a total data dump.
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.

3.9

3.4

[email protected]

7.5

2.0

HIGH

AV:N/AC:L/Au:N/C:P/I:P/A:P 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:N): No authentication is required.
Confidentiality impact (C:P): Partial confidentiality impact.
Integrity impact (I:P): Partial integrity impact.
Availability impact (A:P): Partial availability impact.

10.0

6.4

[email protected]

Affected software / configurations for CVE-2017-7927

Vendor	Product	Version	Raw CPE
dahuasecurity	dh-ipc-hdbw23a0rn-zs_firmware	—	cpe:2.3:o:dahuasecurity:dh-ipc-hdbw23a0rn-zs_firmware:-:::::::*
dahuasecurity	dh-ipc-hdbw13a0sn_firmware	—	cpe:2.3:o:dahuasecurity:dh-ipc-hdbw13a0sn_firmware:-:::::::*
dahuasecurity	dh-ipc-hdw1xxx_firmware	—	cpe:2.3:o:dahuasecurity:dh-ipc-hdw1xxx_firmware:-:::::::*
dahuasecurity	dh-ipc-hdw2xxx_firmware	—	cpe:2.3:o:dahuasecurity:dh-ipc-hdw2xxx_firmware:-:::::::*
dahuasecurity	dh-ipc-hdw4xxx_firmware	—	cpe:2.3:o:dahuasecurity:dh-ipc-hdw4xxx_firmware:-:::::::*
dahuasecurity	dh-ipc-hfw1xxx_firmware	—	cpe:2.3:o:dahuasecurity:dh-ipc-hfw1xxx_firmware:-:::::::*
dahuasecurity	dh-ipc-hfw2xxx_firmware	—	cpe:2.3:o:dahuasecurity:dh-ipc-hfw2xxx_firmware:-:::::::*
dahuasecurity	dh-ipc-hfw4xxx_firmware	—	cpe:2.3:o:dahuasecurity:dh-ipc-hfw4xxx_firmware:-:::::::*
dahuasecurity	dh-sd6cxx_firmware	—	cpe:2.3:o:dahuasecurity:dh-sd6cxx_firmware:-:::::::*
dahuasecurity	dh-nvr1xxx_firmware	—	cpe:2.3:o:dahuasecurity:dh-nvr1xxx_firmware:-:::::::*
dahuasecurity	dh-hcvr4xxx_firmware	—	cpe:2.3:o:dahuasecurity:dh-hcvr4xxx_firmware:-:::::::*
dahuasecurity	dh-hcvr5xxx_firmware	—	cpe:2.3:o:dahuasecurity:dh-hcvr5xxx_firmware:-:::::::*
dahuasecurity	dhi-hcvr51a04he-s3_firmware	—	cpe:2.3:o:dahuasecurity:dhi-hcvr51a04he-s3_firmware:-:::::::*
dahuasecurity	dhi-hcvr51a08he-s3_firmware	—	cpe:2.3:o:dahuasecurity:dhi-hcvr51a08he-s3_firmware:-:::::::*
dahuasecurity	dhi-hcvr58a32s-s2_firmware	—	cpe:2.3:o:dahuasecurity:dhi-hcvr58a32s-s2_firmware:-:::::::*

References for CVE-2017-7927

URL	Tags
http://us.dahuasecurity.com/en/us/Security-Bulletin_030617.php	Patch Vendor Advisory
http://www.securityfocus.com/bid/98312	Third Party Advisory VDB Entry
https://ics-cert.us-cert.gov/advisories/ICSA-17-124-02	Mitigation Third Party Advisory US Government Resource

URL

CVE-2017-7927

Exploit prediction scoring system (EPSS) score for CVE-2017-7927

Common vulnerability scoring system (CVSS) metrics for CVE-2017-7927

Weakness enumeration for CVE-2017-7927

Affected software / configurations for CVE-2017-7927

References for CVE-2017-7927