CVE-2026-126963VulnerabilityPublished 13 Nov 2026

ZDI-26-991: Hinemos Agent Improper Certificate Validation Remote Code Execution Vulnerability

Source Zero Day Initiative

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Not known to be exploited.

Data as of 13 Nov 2026, 22:20 UTC

Severity

High

Rated High by Zero Day Initiative · CVSS not yet scored by NVD

Exploitation evidence

Disclosed: evidence found.
Public on cve.org; its publication date is not in this record
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

AI-suggested

Until a fix is available, restrict network access to the Hinemos Agent and monitor for suspicious activity from network-adjacent sources.

Description

Hinemos Agent contains a vulnerability that allows network-adjacent attackers to execute arbitrary code without authentication due to improper certificate validation. This remote code execution flaw has been assigned CVE-2026-126963 and carries a high severity rating.

Impact

Successful exploitation allows an attacker to execute arbitrary code on affected Hinemos Agent installations without needing authentication, potentially leading to full system compromise or disruption of service.

Summary

The Hinemos Agent suffers from an improper certificate validation vulnerability that enables remote code execution by attackers positioned on the network adjacent to the target system. Exploitation does not require authentication, increasing the risk of compromise. The vulnerability is tracked as CVE-2026-126963 and has a CVSS rating of 7.5 assigned by the Zero Day Initiative.

References

zerodayinitiative.com/advisories/ZDI-26-991/ (opens in a new tab)

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