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Verified reported cyber incident context · South Korea / KISA H1

South Korea private-sector cyber incident reporting context in 2025 H1

Market context — not industry-specific evidence

KISA / KrCERT/CC reported 1,034 private-sector cyber incident reports in 2025 H1, up from 899 in 2024 H1. Server hacking accounted for 531 reports, DDoS attacks for 238 reports and malware infection for 115 reports. The report also provides source-defined sector reporting counts, led by information and communications with 390 reports. These figures are local-market reported-incident context; they are not the percentage of South Korean businesses affected, do not capture hidden or unreported incidents, and are not BilgeQor industry-specific evidence.

South Korea · KISA / KrCERT/CC 2025 H1 reported-incident context2023 H1–2025 H1 trend; 2025 H1 selected categories and source-defined sectors

Private-sector cyber incident reports by half-year — counts

2023 H1

664

Unit: reports
Source: KISA / KrCERT/CC, 2025 H1 Cyber Threat Trends Report
Period: First half of calendar year 2025, with comparison against 2023 H1, 2023 H2, 2024 H1, and 2024 H2 where shown in the source tables
Scope: South Korea KISA / KrCERT/CC 2025 H1 private-sector cyber incident reports

2023 H2

613

Unit: reports
Source: KISA / KrCERT/CC, 2025 H1 Cyber Threat Trends Report
Period: First half of calendar year 2025, with comparison against 2023 H1, 2023 H2, 2024 H1, and 2024 H2 where shown in the source tables
Scope: South Korea KISA / KrCERT/CC 2025 H1 private-sector cyber incident reports

2024 H1

899

Unit: reports
Source: KISA / KrCERT/CC, 2025 H1 Cyber Threat Trends Report
Period: First half of calendar year 2025, with comparison against 2023 H1, 2023 H2, 2024 H1, and 2024 H2 where shown in the source tables
Scope: South Korea KISA / KrCERT/CC 2025 H1 private-sector cyber incident reports

2024 H2

988

Unit: reports
Source: KISA / KrCERT/CC, 2025 H1 Cyber Threat Trends Report
Period: First half of calendar year 2025, with comparison against 2023 H1, 2023 H2, 2024 H1, and 2024 H2 where shown in the source tables
Scope: South Korea KISA / KrCERT/CC 2025 H1 private-sector cyber incident reports

2025 H1

1,034

Unit: reports
Source: KISA / KrCERT/CC, 2025 H1 Cyber Threat Trends Report
Period: First half of calendar year 2025, with comparison against 2023 H1, 2023 H2, 2024 H1, and 2024 H2 where shown in the source tables
Scope: South Korea KISA / KrCERT/CC 2025 H1 private-sector cyber incident reports

Selected 2025 H1 reported incident categories — counts

Server hacking

531

Unit: reports
Source: KISA / KrCERT/CC, 2025 H1 Cyber Threat Trends Report
Period: First half of calendar year 2025, with comparison against 2023 H1, 2023 H2, 2024 H1, and 2024 H2 where shown in the source tables
Scope: South Korea KISA / KrCERT/CC 2025 H1 private-sector cyber incident reports

DDoS attacks

238

Unit: reports
Source: KISA / KrCERT/CC, 2025 H1 Cyber Threat Trends Report
Period: First half of calendar year 2025, with comparison against 2023 H1, 2023 H2, 2024 H1, and 2024 H2 where shown in the source tables
Scope: South Korea KISA / KrCERT/CC 2025 H1 private-sector cyber incident reports

Malware infection

115

Unit: reports
Source: KISA / KrCERT/CC, 2025 H1 Cyber Threat Trends Report
Period: First half of calendar year 2025, with comparison against 2023 H1, 2023 H2, 2024 H1, and 2024 H2 where shown in the source tables
Scope: South Korea KISA / KrCERT/CC 2025 H1 private-sector cyber incident reports

Reported incidents by source-defined sector — counts

Information and communications

390

Unit: reports
Source: KISA / KrCERT/CC, 2025 H1 Cyber Threat Trends Report
Period: First half of calendar year 2025, with comparison against 2023 H1, 2023 H2, 2024 H1, and 2024 H2 where shown in the source tables
Scope: South Korea KISA / KrCERT/CC 2025 H1 private-sector cyber incident reports

Manufacturing

157

Unit: reports
Source: KISA / KrCERT/CC, 2025 H1 Cyber Threat Trends Report
Period: First half of calendar year 2025, with comparison against 2023 H1, 2023 H2, 2024 H1, and 2024 H2 where shown in the source tables
Scope: South Korea KISA / KrCERT/CC 2025 H1 private-sector cyber incident reports

Wholesale and retail

132

Unit: reports
Source: KISA / KrCERT/CC, 2025 H1 Cyber Threat Trends Report
Period: First half of calendar year 2025, with comparison against 2023 H1, 2023 H2, 2024 H1, and 2024 H2 where shown in the source tables
Scope: South Korea KISA / KrCERT/CC 2025 H1 private-sector cyber incident reports

Associations, repair and other services

Unit: reports
Source: KISA / KrCERT/CC, 2025 H1 Cyber Threat Trends Report
Period: First half of calendar year 2025, with comparison against 2023 H1, 2023 H2, 2024 H1, and 2024 H2 where shown in the source tables
Scope: South Korea KISA / KrCERT/CC 2025 H1 private-sector cyber incident reports

Other

296

Unit: reports
Source: KISA / KrCERT/CC, 2025 H1 Cyber Threat Trends Report
Period: First half of calendar year 2025, with comparison against 2023 H1, 2023 H2, 2024 H1, and 2024 H2 where shown in the source tables
Scope: South Korea KISA / KrCERT/CC 2025 H1 private-sector cyber incident reports

Source-defined sector reporting categories only. Do not treat these categories as BilgeQor industry-specific evidence or as the percentage of companies affected.

Source: KISA / KrCERT/CC, 2025 H1 Cyber Threat Trends Report

Scope: KISA / KrCERT/CC 2025 H1 Cyber Threat Trends Report. Figures describe private-sector cyber incident reports and source-defined reporting categories. They do not measure hidden or unreported incidents, the percentage of businesses affected, BilgeQor industry-specific evidence, compliance achievement, certification or security outcomes.

Methodology: Official KISA / KrCERT/CC cyber threat trend report for South Korea, published 2025-08-07. The admitted figures describe private-sector cyber incident reports and source-defined reporting categories for 2025 H1. They do not measure the percentage of South Korean businesses identifying or experiencing cyber attacks, do not capture hidden or unreported incidents, do not provide BilgeQor industry-specific evidence, and do not establish compliance achievement, certification or security outcomes.

Accessible data table

Verified South Korea 2025 H1 reported cyber incident context data from KISA / KrCERT/CC, 2025 H1 Cyber Threat Trends Report, reporting period First half of calendar year 2025, with comparison against 2023 H1, 2023 H2, 2024 H1, and 2024 H2 where shown in the source tables.
Metric	Value	Source	Scope	Reporting period
2023 H1	664 reports	KISA / KrCERT/CC, 2025 H1 Cyber Threat Trends Report	South Korea KISA / KrCERT/CC 2025 H1 private-sector cyber incident reports	First half of calendar year 2025, with comparison against 2023 H1, 2023 H2, 2024 H1, and 2024 H2 where shown in the source tables
2023 H2	613 reports	KISA / KrCERT/CC, 2025 H1 Cyber Threat Trends Report	South Korea KISA / KrCERT/CC 2025 H1 private-sector cyber incident reports	First half of calendar year 2025, with comparison against 2023 H1, 2023 H2, 2024 H1, and 2024 H2 where shown in the source tables
2024 H1	899 reports	KISA / KrCERT/CC, 2025 H1 Cyber Threat Trends Report	South Korea KISA / KrCERT/CC 2025 H1 private-sector cyber incident reports	First half of calendar year 2025, with comparison against 2023 H1, 2023 H2, 2024 H1, and 2024 H2 where shown in the source tables
2024 H2	988 reports	KISA / KrCERT/CC, 2025 H1 Cyber Threat Trends Report	South Korea KISA / KrCERT/CC 2025 H1 private-sector cyber incident reports	First half of calendar year 2025, with comparison against 2023 H1, 2023 H2, 2024 H1, and 2024 H2 where shown in the source tables
2025 H1	1,034 reports	KISA / KrCERT/CC, 2025 H1 Cyber Threat Trends Report	South Korea KISA / KrCERT/CC 2025 H1 private-sector cyber incident reports	First half of calendar year 2025, with comparison against 2023 H1, 2023 H2, 2024 H1, and 2024 H2 where shown in the source tables
Server hacking	531 reports	KISA / KrCERT/CC, 2025 H1 Cyber Threat Trends Report	South Korea KISA / KrCERT/CC 2025 H1 private-sector cyber incident reports	First half of calendar year 2025, with comparison against 2023 H1, 2023 H2, 2024 H1, and 2024 H2 where shown in the source tables
DDoS attacks	238 reports	KISA / KrCERT/CC, 2025 H1 Cyber Threat Trends Report	South Korea KISA / KrCERT/CC 2025 H1 private-sector cyber incident reports	First half of calendar year 2025, with comparison against 2023 H1, 2023 H2, 2024 H1, and 2024 H2 where shown in the source tables
Malware infection	115 reports	KISA / KrCERT/CC, 2025 H1 Cyber Threat Trends Report	South Korea KISA / KrCERT/CC 2025 H1 private-sector cyber incident reports	First half of calendar year 2025, with comparison against 2023 H1, 2023 H2, 2024 H1, and 2024 H2 where shown in the source tables
Information and communications	390 reports	KISA / KrCERT/CC, 2025 H1 Cyber Threat Trends Report	South Korea KISA / KrCERT/CC 2025 H1 private-sector cyber incident reports	First half of calendar year 2025, with comparison against 2023 H1, 2023 H2, 2024 H1, and 2024 H2 where shown in the source tables
Manufacturing	157 reports	KISA / KrCERT/CC, 2025 H1 Cyber Threat Trends Report	South Korea KISA / KrCERT/CC 2025 H1 private-sector cyber incident reports	First half of calendar year 2025, with comparison against 2023 H1, 2023 H2, 2024 H1, and 2024 H2 where shown in the source tables
Wholesale and retail	132 reports	KISA / KrCERT/CC, 2025 H1 Cyber Threat Trends Report	South Korea KISA / KrCERT/CC 2025 H1 private-sector cyber incident reports	First half of calendar year 2025, with comparison against 2023 H1, 2023 H2, 2024 H1, and 2024 H2 where shown in the source tables
Associations, repair and other services	59 reports	KISA / KrCERT/CC, 2025 H1 Cyber Threat Trends Report	South Korea KISA / KrCERT/CC 2025 H1 private-sector cyber incident reports	First half of calendar year 2025, with comparison against 2023 H1, 2023 H2, 2024 H1, and 2024 H2 where shown in the source tables
Other	296 reports	KISA / KrCERT/CC, 2025 H1 Cyber Threat Trends Report	South Korea KISA / KrCERT/CC 2025 H1 private-sector cyber incident reports	First half of calendar year 2025, with comparison against 2023 H1, 2023 H2, 2024 H1, and 2024 H2 where shown in the source tables

Verified reported cyber incident context · South Korea

Reported cyber incident context in South Korea’s private sector

Market context — not industry-specific evidence

KISA / KrCERT/CC recorded 2,383 private-sector cyber incident reports in 2025, compared with 1,887 in 2024. These figures describe official reported-incident records and selected reported incident categories; they are not the percentage of South Korean businesses identifying or experiencing breaches, and they are not industry-specific findings for the sector shown on this page.

South Korea · Private-sector cyber incident reports received by KISA / KrCERT/CCCalendar year 2025 · Compared with 2024

Increase in reported cyber incidents

2025 compared with 2024

26.3%

Unit: percent
Source: KISA / KrCERT/CC, 2025 Cyber Threat Trends and 2026 Outlook
Period: Reported private-sector cyber incident statistics for calendar year 2025, compared with calendar year 2024.
Scope: South Korea private-sector cyber incident reports received by KISA / KrCERT/CC

Private-sector cyber incident reports received by KISA / KrCERT/CC increased from 1,887 in 2024 to 2,383 in 2025.

Official reported-incident volume change only; this is not the percentage of South Korean businesses identifying or experiencing cyber attacks and not industry-specific evidence.

Selected reported cyber incident categories

Server hacking

44.2%

Unit: percent
Source: KISA / KrCERT/CC, 2025 Cyber Threat Trends and 2026 Outlook
Period: Reported private-sector cyber incident statistics for calendar year 2025, compared with calendar year 2024.
Scope: South Korea private-sector cyber incident reports received by KISA / KrCERT/CC

DDoS attacks

24.7%

Unit: percent
Source: KISA / KrCERT/CC, 2025 Cyber Threat Trends and 2026 Outlook
Period: Reported private-sector cyber incident statistics for calendar year 2025, compared with calendar year 2024.
Scope: South Korea private-sector cyber incident reports received by KISA / KrCERT/CC

Malware infections

14.9%

Unit: percent
Source: KISA / KrCERT/CC, 2025 Cyber Threat Trends and 2026 Outlook
Period: Reported private-sector cyber incident statistics for calendar year 2025, compared with calendar year 2024.
Scope: South Korea private-sector cyber incident reports received by KISA / KrCERT/CC

Share of 2025 private-sector cyber incident reports received by KISA / KrCERT/CC for selected source-reported categories. These values are not business incident rates or industry-specific threat findings.

Source: KISA / KrCERT/CC, 2025 Cyber Threat Trends and 2026 Outlook

Scope: Official KISA / KrCERT/CC administrative reported-incident context for South Korea’s private sector. These figures describe incident-report volume and selected reported categories; they do not measure the percentage of businesses identifying or experiencing attacks, industry-specific performance, compliance achievement, certification or security outcomes. Ransomware is not rendered as a separate peer bar in this section because the published source reports it within the malware context.

Methodology: Official KISA / KrCERT/CC administrative reported-incident context for South Korea private-sector cyber incidents. KISA recorded 2,383 private-sector cyber incident reports in 2025, compared with 1,887 in 2024. The admitted indicators describe reported incident volume change and selected reported incident categories only. They do not measure the percentage of South Korean businesses identifying or experiencing cyber attacks, do not provide industry-specific performance evidence, and do not establish compliance achievement, certification or security outcomes.

Accessible data table

Verified South Korea private-sector reported cyber incident context data from KISA / KrCERT/CC, 2025 Cyber Threat Trends and 2026 Outlook, reporting period Reported private-sector cyber incident statistics for calendar year 2025, compared with calendar year 2024..
Metric	Value	Source	Scope	Reporting period
2025 compared with 2024	26.3% percent	KISA / KrCERT/CC, 2025 Cyber Threat Trends and 2026 Outlook	South Korea private-sector cyber incident reports received by KISA / KrCERT/CC	Reported private-sector cyber incident statistics for calendar year 2025, compared with calendar year 2024.
Server hacking	44.2% percent	KISA / KrCERT/CC, 2025 Cyber Threat Trends and 2026 Outlook	South Korea private-sector cyber incident reports received by KISA / KrCERT/CC	Reported private-sector cyber incident statistics for calendar year 2025, compared with calendar year 2024.
DDoS attacks	24.7% percent	KISA / KrCERT/CC, 2025 Cyber Threat Trends and 2026 Outlook	South Korea private-sector cyber incident reports received by KISA / KrCERT/CC	Reported private-sector cyber incident statistics for calendar year 2025, compared with calendar year 2024.
Malware infections	14.9% percent	KISA / KrCERT/CC, 2025 Cyber Threat Trends and 2026 Outlook	South Korea private-sector cyber incident reports received by KISA / KrCERT/CC	Reported private-sector cyber incident statistics for calendar year 2025, compared with calendar year 2024.

Relevant loss and exposure areas

These existing industry scoping prompts help frame a proposal. They do not assert an incident, loss, or market-specific condition.

Industry themes

Account Takeover
Payment Fraud
Compliance Violation

Digital surfaces in scope

Payment GatewaysTrading PlatformsDigital Wallets

What structured security support changes

The Security File turns risk signals into decisions.

Official market data shows where risk exists. The BilgeQor Security File connects that context to your real websites, apps, accounts, payment flows and team responsibilities, so leaders can decide what to fix first.

Why this matters

The file gives your team one place to understand what was reviewed, what matters, what changed, and what still needs a decision.

BilgeQor Method

What the Security File contains

A Security File is not a generic report. It is a structured decision record for the assets, workflows and risks covered by the agreed scope.

Market and sector context

We connect official market signals and industry exposure to the business surfaces in scope.

Exposure map

We map websites, apps, accounts, payment journeys, admin roles, vendors and customer-facing workflows.

Priority register

We separate urgent risks, important improvements and lower-priority findings so the next action is clear.

Executive summary

We provide a concise summary that leadership, operations, vendors or insurers can read without needing raw technical detail.

Remediation roadmap

We turn findings into a 14 / 30 / 90-day action path with ownership, evidence notes and follow-through guidance.

What it is not

Not a guarantee of perfect security.
Not a certification or compliance verdict.
Not a per-company loss estimate or fear-based claim.

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