What’s Vulnerable › Vulnerabilities

CVE-2020-5591

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-06-05 · updated 2026-06-17
• Weakness: CWE-674

Description

XACK DNS 1.11.0 to 1.11.4, 1.10.0 to 1.10.8, 1.8.0 to 1.8.23, 1.7.0 to 1.7.18, and versions before 1.7.0 allow remote attackers to cause a denial of service condition resulting in degradation of the recursive resolver's performance or compromising the recursive resolver as a reflector in a reflection attack.

Affected products

• XACK, Inc. XACK DNS: through 1.7.18; from 1.8.0 through 1.8.23; from 1.10.0 through 1.10.8; from 1.11.0 through 1.11.4

References

• https://jvn.jp/en/jp/JVN40208370/index.html
• https://xack.co.jp/info/?ID=622
• https://jvn.jp/en/jp/JVN40208370/index.html
• https://xack.co.jp/info/?ID=622

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