Cyber Resilience

CVE-2026-4892

HighUpdated

Published: 11 May 2026

Published
11 May 2026
Modified
30 June 2026
KEV Added
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Patch
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CVSS Score v3.1 8.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0078 51.4th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-4892 is a high-severity Heap-based Buffer Overflow (CWE-122) vulnerability in Org (inferred from references). Its CVSS base score is 8.4 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked in the top 48.6% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

A heap-based out-of-bounds write vulnerability in the DHCPv6 implementation of dnsmasq allows local attackers to execute arbitrary code with root privileges via a crafted DHCPv6 packet.

CWE(s)
CWE-122

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
Why these techniques?

Heap out-of-bounds write in privileged DHCPv6 service directly enables local privilege escalation to root via crafted packet.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

Affected Assets

Org
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inferred from references and description; NVD did not file a CPE for this CVE

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References