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Fencer Vulns
critical 9.8

CVE-2021-3942 json

Certain HP Print products and Digital Sending products may be vulnerable to potential remote code execution and buffer overflow with use of…

published 2022-11-22 3 y ago modified 2026-06-17 4 mo ago also EUVD-2021-27155

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.6%
EPSS 1.6% chance of exploitation in 30 days, percentile 75%
public exploits
0
none known

Summary

Certain HP Print products and Digital Sending products may be vulnerable to potential remote code execution and buffer overflow with use of Link-Local Multicast Name Resolution or LLMNR.

Patch / fix

  • hp color_laserjet_cm4540_mfp_cc419a_firmware 3.9.9
  • hp color_laserjet_cm4540_mfp_cc420a_firmware 3.9.9
  • hp color_laserjet_cm4540_mfp_cc421a_firmware 3.9.9
  • hp color_laserjet_cm5525_mfp_ce707a_firmware 3.9.9
  • hp color_laserjet_cm5525_mfp_ce708a_firmware 3.9.9
  • hp color_laserjet_cm5525_mfp_ce709a_firmware 3.9.9
  • hp color_laserjet_m578_mfp_7zu85a_firmware 4.11.2.3, 5.4
  • hp color_laserjet_m578_mfp_7zu86a_firmware 4.11.2.3, 5.4
  • hp color_laserjet_m578_mfp_7zu87a_firmware 4.11.2.3, 5.4
  • hp color_laserjet_m578_mfp_7zu88a_firmware 4.11.2.3, 5.4
  • hp color_laserjet_enterprise_flow_mfp_m880z_d7p70a_firmware 3.9.9, 4.11.2.3
  • hp color_laserjet_enterprise_flow_mfp_m880z_a2w75a_firmware 3.9.9, 4.11.2.3
  • hp color_laserjet_enterprise_flow_mfp_m880z_a2w76a_firmware 3.9.9, 4.11.2.3
  • hp color_laserjet_enterprise_flow_mfp_m880z_d7p71a_firmware 3.9.9, 4.11.2.3
  • hp color_laserjet_enterprise_flow_mfp_m880z_l3u51a_firmware 3.9.9, 4.11.2.3
  • hp color_laserjet_enterprise_flow_mfp_m880z_l3u52a_firmware 3.9.9, 4.11.2.3
  • hp color_laserjet_managed_flow_mfp_m880zm_d7p70a_firmware 3.9.9, 4.11.2.3
  • hp color_laserjet_managed_flow_mfp_m880zm_a2w75a_firmware 3.9.9, 4.11.2.3
  • hp color_laserjet_managed_flow_mfp_m880zm_a2w76a_firmware 3.9.9, 4.11.2.3
  • hp color_laserjet_managed_flow_mfp_m880zm_d7p71a_firmware 3.9.9, 4.11.2.3

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
18 mo ago

Exploit prediction

1.56% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • HP Inc. HP Print products and Digital Sending products

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.