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TI-2021-12970 Aliases CVE-2021-33586GHSA-mjhp-8mjg-4p7m

InspIRCd 3.8.0 through 3.9.x before 3.10.0 allows any user (able to connect to the…

Priority LOW 22CWE-732Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

InspIRCd 3.8.0 through 3.9.x before 3.10.0 allows any user (able to connect to the server) to access recently deallocated memory, aka the "malformed PONG" issue.

Why it matters now

EPSS 0.0089 59th 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
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:inspircd:inspircd:*:*:*:*:*:*:*:*3.8.0 to before 3.10.0VulnerableInspircd
  • cpe:2.3:a:inspircd:inspircd:*:*:*:*:*:*:*:* Versions 3.8.0 to before 3.10.0 Vulnerable ·Inspircd

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-33586
  2. 2026-10-03 Alias added: GHSA-mjhp-8mjg-4p7m

References

Patch 2

Advisory 1

  • TI-2015-05592 Buffer underflow vulnerability in the Debian inspircd package before 2.0.5-1+deb7u1 for… CVSS 3.0CRITICAL 9.8
  • TI-2012-05398 inspircd in Debian before 2.0.7 does not properly handle unsigned integers. CVSS 3.0CRITICAL 9.8
  • TI-2015-07153 The DNS::GetResult function in dns.cpp in InspIRCd before 2.0.19 allows remote DNS… CVSS 3.0HIGH 8.6
  • TI-2012-01620 Heap-based buffer overflow in dns.cpp in InspIRCd 2.0.5 might allow remote attackers to… CVSS 2.0HIGH 7.5
  • TI-2020-15503 An issue was discovered in InspIRCd 2 before 2.0.29 and 3 before 3.6.0. CVSS 3.1MEDIUM 6.5
  • TI-2019-15131 An issue was discovered in InspIRCd 2 before 2.0.28 and 3 before 3.3.0. CVSS 3.1MEDIUM 6.5
See all 9 →

Sources

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