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TI-2020-04560 Aliases CVE-2020-5591GHSA-rgx8-jrmw-j2jr

Uncontrolled recursion in XACK, Inc. XACK DNS

Priority LOW 36CWE-674Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-674.

Summary

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.

Why it matters now

EPSS 0.01639 76th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
XACK, Inc.XACK DNS1.11.0 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—No fix listedCNA
  • XACK DNS VendorXACK, Inc. Affected 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 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:xack:xack_dns:*:*:*:*:*:*:*:*up to 1.7.18; 1.8.0 – 1.8.23; 1.10.0 – 1.10.8; 1.11.0 – 1.11.4VulnerableXACK, Inc.
  • cpe:2.3:a:xack:xack_dns:*:*:*:*:*:*:*:* Versions up to 1.7.18; 1.8.0 – 1.8.23; 1.10.0 – 1.10.8; 1.11.0 – 1.11.4 Vulnerable ·XACK, Inc.

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-5591
  2. 2026-10-03 Alias added: GHSA-rgx8-jrmw-j2jr

References

Advisory 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences