CVE-2021-44735

Embedded web server command injection vulnerability in Lexmark devices through 2021-12-07.

Published: 2022-01-20 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-44735 is rated High Risk (74.2/100): CVSS Critical severity, with high exploitation likelihood (EPSS 13.23%, 94th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +2.03% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-44735

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-04 11.20% 13.23% +2.03%
2 2026-01-31 12.55% 11.20% -1.35%
3 2025-11-21 — 12.55% —

Full EPSS history (26 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-44735

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
10.0 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 10.0 [email protected]

Weakness enumeration for CVE-2021-44735

Affected software / configurations for CVE-2021-44735

Vendor Product Version Raw CPE
lexmark b2236_firmware < mslsg.076.294 cpe:2.3:o:lexmark:b2236_firmware:*:*:*:*:*:*:*:*
lexmark mb2236_firmware < mxlsg.076.294 cpe:2.3:o:lexmark:mb2236_firmware:*:*:*:*:*:*:*:*
lexmark ms431_firmware < mslbd.076.294 cpe:2.3:o:lexmark:ms431_firmware:*:*:*:*:*:*:*:*
lexmark ms331_firmware < mslbd.076.294 cpe:2.3:o:lexmark:ms331_firmware:*:*:*:*:*:*:*:*
lexmark m1342_firmware < mslbd.076.294 cpe:2.3:o:lexmark:m1342_firmware:*:*:*:*:*:*:*:*
lexmark b3442_firmware < mslbd.076.294 cpe:2.3:o:lexmark:b3442_firmware:*:*:*:*:*:*:*:*
lexmark b3340_firmware < mslbd.076.294 cpe:2.3:o:lexmark:b3340_firmware:*:*:*:*:*:*:*:*
lexmark xm1342_firmware < mslbd.076.294 cpe:2.3:o:lexmark:xm1342_firmware:*:*:*:*:*:*:*:*
lexmark mx331_firmware < mxlbd.076.294 cpe:2.3:o:lexmark:mx331_firmware:*:*:*:*:*:*:*:*
lexmark mx431_firmware < mxlbd.076.294 cpe:2.3:o:lexmark:mx431_firmware:*:*:*:*:*:*:*:*
lexmark mb3442_firmware < mxlbd.076.294 cpe:2.3:o:lexmark:mb3442_firmware:*:*:*:*:*:*:*:*
lexmark ms321_firmware < msngm.076.294 cpe:2.3:o:lexmark:ms321_firmware:*:*:*:*:*:*:*:*
lexmark ms421_firmware < msngm.076.294 cpe:2.3:o:lexmark:ms421_firmware:*:*:*:*:*:*:*:*
lexmark ms521_firmware < msngm.076.294 cpe:2.3:o:lexmark:ms521_firmware:*:*:*:*:*:*:*:*
lexmark ms621_firmware < msngm.076.294 cpe:2.3:o:lexmark:ms621_firmware:*:*:*:*:*:*:*:*
lexmark m1242_firmware < msngm.076.294 cpe:2.3:o:lexmark:m1242_firmware:*:*:*:*:*:*:*:*
lexmark m1246_firmware < msngm.076.294 cpe:2.3:o:lexmark:m1246_firmware:*:*:*:*:*:*:*:*
lexmark b2338_firmware < msngm.076.294 cpe:2.3:o:lexmark:b2338_firmware:*:*:*:*:*:*:*:*
lexmark b2442_firmware < msngm.076.294 cpe:2.3:o:lexmark:b2442_firmware:*:*:*:*:*:*:*:*
lexmark b2546_firmware < msngm.076.294 cpe:2.3:o:lexmark:b2546_firmware:*:*:*:*:*:*:*:*
lexmark b2650_firmware < msngm.076.294 cpe:2.3:o:lexmark:b2650_firmware:*:*:*:*:*:*:*:*
lexmark ms622_firmware < mstgm.076.294 cpe:2.3:o:lexmark:ms622_firmware:*:*:*:*:*:*:*:*
lexmark m3250_firmware < mstgm.076.294 cpe:2.3:o:lexmark:m3250_firmware:*:*:*:*:*:*:*:*
lexmark mx321_firmware < mxngm.076.294 cpe:2.3:o:lexmark:mx321_firmware:*:*:*:*:*:*:*:*
lexmark mb2338_firmware < mxngm.076.294 cpe:2.3:o:lexmark:mb2338_firmware:*:*:*:*:*:*:*:*
lexmark mx421_firmware < mxtgm.076.294 cpe:2.3:o:lexmark:mx421_firmware:*:*:*:*:*:*:*:*
lexmark mx521_firmware < mxtgm.076.294 cpe:2.3:o:lexmark:mx521_firmware:*:*:*:*:*:*:*:*
lexmark mx522_firmware < mxtgm.076.294 cpe:2.3:o:lexmark:mx522_firmware:*:*:*:*:*:*:*:*
lexmark mx622_firmware < mxtgm.076.294 cpe:2.3:o:lexmark:mx622_firmware:*:*:*:*:*:*:*:*
lexmark xm1242_firmware < mxtgm.076.294 cpe:2.3:o:lexmark:xm1242_firmware:*:*:*:*:*:*:*:*
lexmark xm1246_firmware < mxtgm.076.294 cpe:2.3:o:lexmark:xm1246_firmware:*:*:*:*:*:*:*:*
lexmark xm3250_firmware < mxtgm.076.294 cpe:2.3:o:lexmark:xm3250_firmware:*:*:*:*:*:*:*:*
lexmark mb2442_firmware < mxtgm.076.294 cpe:2.3:o:lexmark:mb2442_firmware:*:*:*:*:*:*:*:*
lexmark mb2546_firmware < mxtgm.076.294 cpe:2.3:o:lexmark:mb2546_firmware:*:*:*:*:*:*:*:*
lexmark mb2650_firmware < mxtgm.076.294 cpe:2.3:o:lexmark:mb2650_firmware:*:*:*:*:*:*:*:*
lexmark ms821_firmware < msngw.076.294 cpe:2.3:o:lexmark:ms821_firmware:*:*:*:*:*:*:*:*
lexmark ms823_firmware < msngw.076.294 cpe:2.3:o:lexmark:ms823_firmware:*:*:*:*:*:*:*:*
lexmark ms825_firmware < msngw.076.294 cpe:2.3:o:lexmark:ms825_firmware:*:*:*:*:*:*:*:*
lexmark b2865_firmware < msngw.076.294 cpe:2.3:o:lexmark:b2865_firmware:*:*:*:*:*:*:*:*
lexmark ms725_firmware < msngw.076.294 cpe:2.3:o:lexmark:ms725_firmware:*:*:*:*:*:*:*:*
lexmark ms822_firmware < mstgw.076.294 cpe:2.3:o:lexmark:ms822_firmware:*:*:*:*:*:*:*:*
lexmark ms826_firmware < mstgw.076.294 cpe:2.3:o:lexmark:ms826_firmware:*:*:*:*:*:*:*:*
lexmark m5255_firmware < mstgw.076.294 cpe:2.3:o:lexmark:m5255_firmware:*:*:*:*:*:*:*:*
lexmark m5270_firmware < mstgw.076.294 cpe:2.3:o:lexmark:m5270_firmware:*:*:*:*:*:*:*:*
lexmark mx722_firmware < mxtgw.076.294 cpe:2.3:o:lexmark:mx722_firmware:*:*:*:*:*:*:*:*
lexmark mx822_firmware < mxtgw.076.294 cpe:2.3:o:lexmark:mx822_firmware:*:*:*:*:*:*:*:*
lexmark mx826_firmware < mxtgw.076.294 cpe:2.3:o:lexmark:mx826_firmware:*:*:*:*:*:*:*:*
lexmark xm5365_firmware < mxtgw.076.294 cpe:2.3:o:lexmark:xm5365_firmware:*:*:*:*:*:*:*:*
lexmark xm7355_firmware < mxtgw.076.294 cpe:2.3:o:lexmark:xm7355_firmware:*:*:*:*:*:*:*:*
lexmark xm7370_firmware < mxtgw.076.294 cpe:2.3:o:lexmark:xm7370_firmware:*:*:*:*:*:*:*:*
lexmark mb2770_firmware < mxtgw.076.294 cpe:2.3:o:lexmark:mb2770_firmware:*:*:*:*:*:*:*:*
lexmark mx721_firmware < mxtgw.076.294 cpe:2.3:o:lexmark:mx721_firmware:*:*:*:*:*:*:*:*
lexmark c3426_firmware < cslbn.076.294 cpe:2.3:o:lexmark:c3426_firmware:*:*:*:*:*:*:*:*
lexmark c2326_firmware < cslbn.076.294 cpe:2.3:o:lexmark:c2326_firmware:*:*:*:*:*:*:*:*
lexmark cs431_firmware < cslbn.076.294 cpe:2.3:o:lexmark:cs431_firmware:*:*:*:*:*:*:*:*
lexmark cs439_firmware < cslbn.076.294 cpe:2.3:o:lexmark:cs439_firmware:*:*:*:*:*:*:*:*
lexmark cs331_firmware < cslbl.076.294 cpe:2.3:o:lexmark:cs331_firmware:*:*:*:*:*:*:*:*
lexmark c3224_firmware < cslbl.076.294 cpe:2.3:o:lexmark:c3224_firmware:*:*:*:*:*:*:*:*
lexmark c3326_firmware < cslbl.076.294 cpe:2.3:o:lexmark:c3326_firmware:*:*:*:*:*:*:*:*
lexmark mc3426_firmware < cxlbn.076.294 cpe:2.3:o:lexmark:mc3426_firmware:*:*:*:*:*:*:*:*
lexmark cx431_firmware < cxlbn.076.294 cpe:2.3:o:lexmark:cx431_firmware:*:*:*:*:*:*:*:*
lexmark xc2326_firmware < cxlbn.076.294 cpe:2.3:o:lexmark:xc2326_firmware:*:*:*:*:*:*:*:*
lexmark mc3224_firmware < cxlbl.076.294 cpe:2.3:o:lexmark:mc3224_firmware:*:*:*:*:*:*:*:*
lexmark mc3326_firmware < cxlbl.076.294 cpe:2.3:o:lexmark:mc3326_firmware:*:*:*:*:*:*:*:*
lexmark cx331_firmware < cxlbl.076.294 cpe:2.3:o:lexmark:cx331_firmware:*:*:*:*:*:*:*:*
lexmark cs622_firmware < cstzj.076.294 cpe:2.3:o:lexmark:cs622_firmware:*:*:*:*:*:*:*:*
lexmark c2240_firmware < cstzj.076.294 cpe:2.3:o:lexmark:c2240_firmware:*:*:*:*:*:*:*:*
lexmark cs421_firmware < csnzj.076.294 cpe:2.3:o:lexmark:cs421_firmware:*:*:*:*:*:*:*:*
lexmark cs521_firmware < csnzj.076.294 cpe:2.3:o:lexmark:cs521_firmware:*:*:*:*:*:*:*:*
lexmark c2325_firmware < csnzj.076.294 cpe:2.3:o:lexmark:c2325_firmware:*:*:*:*:*:*:*:*
lexmark c2425_firmware < csnzj.076.294 cpe:2.3:o:lexmark:c2425_firmware:*:*:*:*:*:*:*:*
lexmark c2535_firmware < csnzj.076.294 cpe:2.3:o:lexmark:c2535_firmware:*:*:*:*:*:*:*:*
lexmark cx522_firmware < cxtzj.076.294 cpe:2.3:o:lexmark:cx522_firmware:*:*:*:*:*:*:*:*
lexmark cx622_firmware < cxtzj.076.294 cpe:2.3:o:lexmark:cx622_firmware:*:*:*:*:*:*:*:*
lexmark cx625_firmware < cxtzj.076.294 cpe:2.3:o:lexmark:cx625_firmware:*:*:*:*:*:*:*:*
lexmark xc2235_firmware < cxtzj.076.294 cpe:2.3:o:lexmark:xc2235_firmware:*:*:*:*:*:*:*:*
lexmark xc4240_firmware < cxtzj.076.294 cpe:2.3:o:lexmark:xc4240_firmware:*:*:*:*:*:*:*:*
lexmark mc2535_firmware < cxtzj.076.294 cpe:2.3:o:lexmark:mc2535_firmware:*:*:*:*:*:*:*:*
lexmark mc2640_firmware < cxtzj.076.294 cpe:2.3:o:lexmark:mc2640_firmware:*:*:*:*:*:*:*:*
lexmark cx421_firmware < cxnzj.076.294 cpe:2.3:o:lexmark:cx421_firmware:*:*:*:*:*:*:*:*

References for CVE-2021-44735

cvelogic Threat Intelligence