CRITICAL
CVE-2021-44735
CWE-77Published: January 20, 2022· Updated: Jun 17, 2026
9.8
CVSS v3.1
Official Description
Embedded web server command injection vulnerability in Lexmark devices through 2021-12-07.
Technical Analysis
CVE-2021-44735 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Vendors & Products
lexmark236 product(s)
b2236 firmwareb2236mb2236 firmwaremb2236ms431 firmwarems431ms331 firmwarems331m1342 firmwarem1342b3442 firmwareb3442+224
Source: NVD CPE · 236 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (8)
→
https://support.lexmark.com/alerts/Vendor Advisory
→
https://www.zerodayinitiative.com/advisories/ZDI-22-326/Third Party Advisory · VDB Entry
→
https://www.zerodayinitiative.com/advisories/ZDI-22-329/Third Party Advisory · VDB Entry
→
https://www.zerodayinitiative.com/advisories/ZDI-22-330/Third Party Advisory · VDB Entry
→
https://support.lexmark.com/alerts/Vendor Advisory
→
https://www.zerodayinitiative.com/advisories/ZDI-22-326/Third Party Advisory · VDB Entry
→
https://www.zerodayinitiative.com/advisories/ZDI-22-329/Third Party Advisory · VDB Entry
→
https://www.zerodayinitiative.com/advisories/ZDI-22-330/Third Party Advisory · VDB Entry
Quick Facts
CVE IDCVE-2021-44735
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-77
CISA KEVNo
Affected1 vendor(s)
PublishedJan 20, 2022
Related CVEs (CWE-77)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-44735 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.