CVE-2021-28670Network attack vector

Unauthenticated file deletion via Scan To Mailbox

Published Mar 29, 2021 · Updated Aug 3, 2024

File deletion in Xerox AltaLink B8045/B8090 and C8030/C8035/C8045/C8055/C8070 firmware allows remote attackers to delete files via Scan To Mailbox. The Scan To Mailbox workflow permits unauthorized selection of arbitrary disk files for deletion; Xerox has not disclosed the responsible endpoint or validation failure. Network access is sufficient, with no authentication or user interaction, and successful deletion can destroy stored data or interrupt device operation.

CVSS severity9.1
Critical
EPSS probability0.96%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

File deletion in Xerox AltaLink B8045/B8090 and C8030/C8035/C8045/C8055/C8070 firmware allows remote attackers to delete files via Scan To Mailbox. The Scan To Mailbox workflow permits unauthorized selection of arbitrary disk files for deletion; Xerox has not disclosed the responsible endpoint or validation failure. Network access is sufficient, with no authentication or user interaction, and successful deletion can destroy stored data or interrupt device operation.

The record

CVE
CVE-2021-28670
Published
Mar 29, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1485
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 29, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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 vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
6.4NIST NVDAV:N/AC:L/Au:N/C:N/I:P/A:P

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1485Data Destruction

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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