CVE intelligence and bounded remediation

CVE-2021-28670 — Xerox Altalink B8045 Firmware security vulnerability

Critical CVSS 9.1

Xerox AltaLink B8045/B8090 before 103.008.030.32000, C8030/C8035 before 103.001.030.32000, C8045/C8055 before 103.002.030.32000 and C8070 before 103.003.030.32000 allow unauthorized users, by leveraging the Scan To Mailbox feature, to delete arbitrary files from the disk.

Severity
Critical
CVSS
9.1 (3.1)
Published
2021-03-29
CISA KEV
Not currently listed
Ecosystem
operating-system

Affected products

  • xerox / altalink_b8045_firmware
  • xerox / altalink_b8055_firmware
  • xerox / altalink_b8065_firmware
  • xerox / altalink_b8075_firmware
  • xerox / altalink_b8090_firmware
  • xerox / altalink_c8030_firmware

Showing 6 representative product identities from 10 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Path traversal, unsafe upload, and file handling

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Trace untrusted filenames, archive entries, URLs, and path segments into read, write, include, extraction, and upload operations.
  • Identify filesystem roots, mount permissions, symbolic-link behavior, archive handling, and whether uploaded content is web-accessible or executable.
  • Review canonicalization and containment checks across supported operating systems and storage backends.

Remediate safely

  • Generate server-side storage identifiers and resolve paths beneath a fixed root using filesystem-aware containment checks.
  • Reject absolute, parent-relative, alternate-separator, device, link, and archive entries that escape the intended root.
  • Store uploads outside executable or served paths, validate type and size, and use private atomic temporary files.

Authoritative sources

Complete CVE record and remediation plan

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