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Lazarus Group Targets 30 South Korean Servers via PHP Vulnerabilities

Lazarus Group Targets 30 South Korean Servers via PHP Vulnerabilities

First seen 15 Nov 2026, 00:12 UTC • •

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ThreatCluster AI
ThreatCluster •November 15, 2026 at 02:13 UTC

The North Korean-linked Lazarus Group has targeted 30 servers in South Korea, exploiting critical PHP vulnerabilities (CVE-2026-109618, CVE-2026-109619) to conduct cyberattacks on key sectors including government, finance, and telecommunications. The attacks were part of a broader campaign that affected 581 servers across 10 countries, with the hackers using compromised IPs to deploy malicious web shells and steal credentials. CYFIRMA, a global threat intelligence firm, reported that the attackers scouted targets in a closed online channel, specifically mentioning promising IP ranges in South Korea and other countries. The vulnerabilities exploited are critical, with a CVSS score of 9.2, and have been since their disclosure. While the attackers were able to identify targets, it remains unclear if any successful breaches occurred. Security experts emphasize that simply updating PHP applications will not suffice; core PHP security patches must be applied.

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Timeline

2026-10-21
CVE-2026-109618 and CVE-2026-109619 published
Two critical PHP vulnerabilities were disclosed, both with a CVSS score of 9.2.
Finance.Biggo
2026-10-26
CVE-2026-109618 and CVE-2026-109619 added to CISA KEV
CISA listed both vulnerabilities as actively exploited, indicating their critical nature.
Finance.Biggo
2026-10-28
Lazarus Group discusses targets
Hackers mentioned promising IP ranges in South Korea and other countries on a closed channel.
Mk.Co.Kr
2026-11-15
CYFIRMA reports on attacks
CYFIRMA released findings on the Lazarus Group's targeting of South Korean servers, confirming the scale of the attack.
Koreaherald

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Common questions

What sectors are affected by the Lazarus Group's attacks?
The targeted sectors include government agencies, finance, telecommunications, and critical infrastructure.
What should organizations do to protect against these vulnerabilities?
Organizations must apply security patches to the PHP core and restart all web worker processes to mitigate the risk.
Is there evidence of successful breaches from this attack?
While the attackers identified targets, it is unclear if any successful breaches occurred according to the reports.