What’s Vulnerable › Vulnerabilities

CVE-2021-45918: NHI’s health insurance web service component – Heap-based Buffer Overflow

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-06-20 · updated 2026-06-17
• Weakness: CWE-122

Description

NHI’s health insurance web service component has insufficient validation for input string length, which can result in heap-based buffer overflow attack. A remote attacker can exploit this vulnerability to flood the memory space reserved for the program, in order to terminate service without authentication, which requires a system restart to recover service.

Affected products

• NHI health insurance web service component: all versions

References

• https://www.twcert.org.tw/tw/cp-132-6227-eaf49-1.html
• https://www.twcert.org.tw/tw/cp-132-6227-eaf49-1.html

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