What is the CVSS score of CVE-2025-45851?

CVE-2025-45851 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.1%.

How to fix or mitigate CVE-2025-45851?

Within 7 days: Identify all affected systems running Hikvision DS-2CD1321-I and apply vendor patches promptly. Monitor vendor channels for patch availability.

Hikvision CVE-2025-45851

EUVD-2025-19428 HIGH

2025-06-27 cve@mitre.org

Denial Of Service Hikvision

7.5

CVSS 3.1 · NVD

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Vulnerability Assessment

Impact	Service disruption affecting availability. In critical infrastructure, DoS can have cascading effects on dependent systems. With a CVSS score of 7.5 (HIGH), this represents a significant risk.
Exploit ScenarioDerived	An attacker sends specially crafted requests that cause excessive resource consumption (CPU, memory, disk) or trigger a crash in the target application.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 16, 2026

An issue in Hikvision DS-2CD1321-I V5.7.21 build 230819 allows attackers to cause a Denial of Service (DoS) via sending a crafted POST request to the endpoint /ISAPI/Security/challenge. The vendor has stated that upgrading to V5.7.23_SP2 fixes the issue.

Earlier versions of this analysis (1)

v1 Mar 16, 2026 - 00:16 CVSS 7.5

RemediationAI

Implement rate limiting and input validation. Use timeout mechanisms for resource-intensive operations. Deploy DDoS protection where applicable.

Affected VersionsENISA

n/a n/a

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

A denial of service vulnerability allows an attacker to disrupt the normal functioning of a system, making it unavailable to legitimate users.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Executive ViewAI

Why It Matters

Organizations using Hikvision DS-2CD1321-I face notable risk from CVE-2025-45851 rated CVSS 7.5. Exploitation could compromise the security of affected deployments. Organizations should apply vendor updates when available and consider compensating controls in the interim.

Business Impact: High

Compensating Controls

Apply vendor patch. If immediate patching is not feasible: (1) Implement network-level access controls to limit exposure; (2) Enable enhanced monitoring and alerting; (3) Apply principle of least privilege.

Threat Intelligence Overview

EPSS Score

0.1%

Top 68% exploitable

Data Quality

4 sources

Confidence: Medium

EUVD

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 0.1%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact

High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +38

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

More in Hikvision

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CVE-2017-7921 CRITICAL Act Now POC

9.8 May 06

An Improper Authentication issue was discovered in Hikvision DS-2CD2xx2F-I Series V5.2.0 build 140721 to V5.4.0 build 16

CVE-2014-4880 HIGH Act Now POC

7.5 Dec 08

Buffer overflow in Hikvision DVR DS-7204 Firmware 2.2.10 build 131009, and other models and versions, allows remote atta

CVE-2013-4977 CRITICAL Emergency POC

10.0 Mar 03

Buffer overflow in the RTSP Packet Handler in Hikvision DS-2CD7153-E IP camera with firmware 4.1.0 b130111 (Jan 2013), a

CVE-2021-36260 CRITICAL Emergency POC

9.8 Sep 22

A command injection vulnerability in the web server of some Hikvision product. Rated critical severity (CVSS 9.8), this

CVE-2023-6895 CRITICAL Act Now POC

9.8 Dec 17

A vulnerability was found in Hikvision Intercom Broadcasting System 3.0.3_20201113_RELEASE(HIK). Rated critical severity

CVE-2022-28171 CRITICAL Act Now POC

9.8 Jun 27

The web module in some Hikvision Hybrid SAN/Cluster Storage products have the following security vulnerability. Rated cr

CVE-2023-6893 HIGH This Week POC

7.5 Dec 17

A vulnerability was found in Hikvision Intercom Broadcasting System 3.0.3_20201113_RELEASE(HIK) and classified as proble

CVE-2025-34067 CRITICAL Act Now

10.0 Jul 02

An unauthenticated remote command execution vulnerability exists in the applyCT component of the Hikvision Integrated Se

CVE-2023-6894 MEDIUM This Month POC

6.5 Dec 17

A vulnerability was found in Hikvision Intercom Broadcasting System 3.0.3_20201113_RELEASE(HIK). Rated medium severity (

CVE-2023-28812 CRITICAL Act Now

9.8 Nov 23

There is a buffer overflow vulnerability in a web browser plug-in could allow an attacker to exploit the vulnerability b

CVE-2023-28808 CRITICAL Act Now

9.8 Apr 11

Some Hikvision Hybrid SAN/Cluster Storage products have an access control vulnerability which can be used to obtain the

CVE-2022-28173 CRITICAL Act Now

9.8 Dec 19

The web server of some Hikvision wireless bridge products have an access control vulnerability which can be used to obta

Same technique Denial Of Service

View all

CVE-2015-5119 CRITICAL POC

9.8

CVE-2011-2462 CRITICAL POC

9.8

CVE-2011-0611 HIGH POC

8.8

CVE-2012-1889 HIGH POC

8.8

CVE-2012-0507 CRITICAL POC

9.8

CVE-2014-1761 HIGH POC

7.8

CVE-2015-5122 CRITICAL POC

9.8

CVE-2011-0609 HIGH POC

7.8

References

Advisories & patches

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2025-45851 ADVISORY https://www.hikvision.com/en/support/download/firmware REF https://assets.hikvision.com/prd/public/all/files/202506/releasenote%5CNetwork_Camera-V5.7.23_SP2_Release_Note-E8.pdf REF https://crashpark.weebly.com/blog/hikvision-ip-camera-unauthenticated-denial-of-service-dos REF https://www.hikvision.com/en/support/download/firmware/

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