No exploitation reportedFix available

CVE-2021-28670

Q: Is CVE-2021-28670 actively exploited?

Active exploitation of CVE-2021-28670 has not been confirmed. Its EPSS score was 1.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2021-28670?

CVE-2021-28670 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

No exploitation reported by the sources we read.

Published2021-03-29
Fixed in103.008.020.23120

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC

2021-03-2918:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-28670?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-28670?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Xerox altalink b8045 firmwareversion to verify

Branch	Affected	Fixed in	Source
103.8	< 103.008.020.23120	103.008.020.23120	NVD

Xerox altalink b8055 firmwareversion to verify

Branch	Affected	Fixed in	Source
103.8	< 103.008.020.23120	103.008.020.23120	NVD

Xerox altalink b8065 firmwareversion to verify

Branch	Affected	Fixed in	Source
103.8	< 103.008.020.23120	103.008.020.23120	NVD

7 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Xerox altalink b8045 firmware to 103.008.020.23120

Advisories and patches

securitydocs.business.xerox.comPatch · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.19.1read 2026-10-23
NVDCVSS 2.06.4read 2026-10-23
FIRST EPSSEPSS score1.1 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Published: 2021-03-29
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-28670?

Is CVE-2021-28670 actively exploited?

Active exploitation of CVE-2021-28670 has not been confirmed. Its EPSS score was 1.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-28670?

CVE-2021-28670 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

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