CVE-2026-85507Network attack vectorHinoki check available

Code execution via unbounded BMC response accumulation

Published Sep 4, 2026 · Updated Sep 4, 2026

Stack-based buffer overflow in GNU Project FreeIPMI before 1.6.19 allows remote attackers to execute code via a crafted Dell CMC response. The _output_dell_system_info_cmc_info routine appends up to four BMC-supplied blocks into a 256-byte stack buffer without checking the running offset before memcpy. The flaw is reached when ipmi-oem runs dell get-system-info cmc-info against a malicious or compromised CMC, enabling code execution in the client's context.

CVSS severity9.8
Critical
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Stack-based buffer overflow in GNU Project FreeIPMI before 1.6.19 allows remote attackers to execute code via a crafted Dell CMC response. The _output_dell_system_info_cmc_info routine appends up to four BMC-supplied blocks into a 256-byte stack buffer without checking the running offset before memcpy. The flaw is reached when ipmi-oem runs dell get-system-info cmc-info against a malicious or compromised CMC, enabling code execution in the client's context.

The record

CVE
CVE-2026-85507
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
The GnuPG Project
Product
FreeIPMI
Classifications
CWE-121, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.6.19

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The GnuPG Project · FreeIPMIversion=0 <1.6.19

Published CVSS scores

9.8MITRE CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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