CVE-2025-36553

Firmware memory corruption via oversized transportLen copy

Published Nov 17, 2025 · Updated Nov 17, 2025

Buffer overflow in Dell ControlVault3 before 5.15.14.19 and ControlVault3 Plus before 6.2.36.47 allows local users to corrupt firmware memory. CvManager passes the attacker-controlled transportLen value to memcpy after validation permits 0x10080 bytes, although CV_COMMAND_BUF holds only 4,096 bytes. Any low-privilege Windows user can reach the firmware through the ControlVault DLL and driver, allowing corruption of adjacent heap metadata and session objects.

CVSS severity8.8
High
EPSS probability0.27%
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 Dell ControlVault3 before 5.15.14.19 and ControlVault3 Plus before 6.2.36.47 allows local users to corrupt firmware memory. CvManager passes the attacker-controlled transportLen value to memcpy after validation permits 0x10080 bytes, although CV_COMMAND_BUF holds only 4,096 bytes. Any low-privilege Windows user can reach the firmware through the ControlVault DLL and driver, allowing corruption of adjacent heap metadata and session objects.

The record

CVE
CVE-2025-36553
Published
Nov 17, 2025
Updated
Nov 17, 2025
Vendor
Dell
Product
ControlVault3 Plus
Classifications
CWE-120, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 17, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 17, 2025Record 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 <6.2.36.47

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Dell · ControlVault3 Plusversion=0 <6.2.36.47
Dell · ControlVault3version=0 <5.15.14.19
Brocade Communications Systems · BCM5820X Familyversion=NA

Published CVSS scores

8.8Cisco TalosCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/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)
Vectorlocal
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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