CVE-2020-24474

Privilege escalation via undisclosed BMC buffer overflow

Published Jun 9, 2021 · Updated Aug 4, 2024

Buffer overflow in Intel BMC firmware before 2.48.ce3e3bd2 allows remote authenticated users to escalate privileges via adjacent access. Intel identifies BMC firmware as the locus but has not disclosed the input, handler, buffer, or unchecked copy that triggers the overflow. Exploitation requires low-privileged authentication and adjacency to the management interface, and successful exploitation grants higher privileges while affecting BMC integrity or availability.

CVSS severity4.4
Medium
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in Intel BMC firmware before 2.48.ce3e3bd2 allows remote authenticated users to escalate privileges via adjacent access. Intel identifies BMC firmware as the locus but has not disclosed the input, handler, buffer, or unchecked copy that triggers the overflow. Exploitation requires low-privileged authentication and adjacency to the management interface, and successful exploitation grants higher privileges while affecting BMC integrity or availability.

The record

CVE
CVE-2020-24474
Published
Jun 9, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1068
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 9, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.4Intel CorporationCVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L
5.2NIST NVDAV:A/AC:L/Au:S/C:P/I:P/A:P
8.0NIST NVDCVSS:3.1/AV:A/AC:L/PR:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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