CVE-2021-44735: Embedded web server command injection vulnerability in Lexmark devices through 2021-12-07.
Noroxi assessment
Priority: Plan (action score 41/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 7% (FIRST EPSS); higher than 94.1% of all records.
- Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
- According to the record, no fixed version is available yet.
Add it to your regular patch cycle. Update when a fix is released; follow the vendor's advisory.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
- Published
- Jan 20, 2022
- Updated
- Jun 17, 2026
- EPSS
- 7.0% · 94th percentile
- CWE
- CWE-77
Report tools
Action score
41
Plan
Add it to your regular patch cycle.
- CVSS
- 39 / 40 · 9.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 2 / 30 · 7.0%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- No fixed version yet
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| lexmark | b2236 firmware | cpe:2.3:o:lexmark:b2236_firmware |
| lexmark | b2236 | cpe:2.3:h:lexmark:b2236 |
| lexmark | mb2236 firmware | cpe:2.3:o:lexmark:mb2236_firmware |
| lexmark | mb2236 | cpe:2.3:h:lexmark:mb2236 |
| lexmark | ms431 firmware | cpe:2.3:o:lexmark:ms431_firmware |
| lexmark | ms431 | cpe:2.3:h:lexmark:ms431 |
| lexmark | ms331 firmware | cpe:2.3:o:lexmark:ms331_firmware |
| lexmark | ms331 | cpe:2.3:h:lexmark:ms331 |
| lexmark | m1342 firmware | cpe:2.3:o:lexmark:m1342_firmware |
| lexmark | m1342 | cpe:2.3:h:lexmark:m1342 |
| lexmark | b3442 firmware | cpe:2.3:o:lexmark:b3442_firmware |
| lexmark | b3442 | cpe:2.3:h:lexmark:b3442 |
and 188 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- lexmark b2236 firmwarebefore mslsg.076.294
- lexmark b2338 firmwarebefore msngm.076.294
- lexmark b2442 firmwarebefore msngm.076.294
- lexmark b2546 firmwarebefore msngm.076.294
- lexmark b2650 firmwarebefore msngm.076.294
- lexmark b2865 firmwarebefore msngw.076.294
- lexmark b3340 firmwarebefore mslbd.076.294
- lexmark b3442 firmwarebefore mslbd.076.294
- lexmark c2240 firmwarebefore cstzj.076.294
- lexmark c2325 firmwarebefore csnzj.076.294
- lexmark c2326 firmwarebefore cslbn.076.294
- lexmark c2425 firmwarebefore csnzj.076.294
- lexmark c2535 firmwarebefore csnzj.076.294
- lexmark c3224 firmwarebefore cslbl.076.294
- lexmark c3326 firmwarebefore cslbl.076.294
- lexmark c3426 firmwarebefore cslbn.076.294
- lexmark c4150 firmwarebefore cstat.076.294
- lexmark c6160 firmwarebefore cstpp.076.294
- lexmark c9235 firmwarebefore cstmh.076.294
- lexmark cs331 firmwarebefore cslbl.076.294
Same product
lexmark: all recordsOther highest-scoring records for the same primary product.
- CVE-2023-23560In certain Lexmark products through 2023-01-12, SSRF can occur because of a lack of input validation.43Plan
- CVE-2021-44734Embedded web server input sanitization vulnerability in Lexmark devices through 2021-12-07, which can which can lead to remote code executio41Plan
- CVE-2021-44738Buffer overflow vulnerability has been identified in Lexmark devices through 2021-12-07 in postscript interpreter.40Plan
Published before and after this one in the same product
- Later →CVE-2021-44737Jan 20, 2022 · PJL directory traversal vulnerability in Lexmark devices through 2021-12-07 that can be leveraged to overwrite internal configuration files.35Monitor
- Later →CVE-2022-29850Aug 25, 2022 · Various Lexmark products through 2022-04-27 allow an attacker who has already compromised an affected Lexmark device to maintain persistence32Monitor
- Later →CVE-2023-22960Jan 23, 2023 · Lexmark products through 2023-01-10 have Improper Control of Interaction Frequency.38Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
No history yet (it accumulates with the daily EPSS job).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-77 · Improper Neutralization of Special Elements used in a Command ('Command Injection')CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- LDAP InjectionCAPEC-136likelihood: High · High
- Command DelimitersCAPEC-15likelihood: High · High
- IMAP/SMTP Command InjectionCAPEC-183Medium
- Command InjectionCAPEC-248likelihood: Medium · High
- Manipulating Writeable Terminal DevicesCAPEC-40likelihood: High · Very High
- Exploiting Multiple Input Interpretation LayersCAPEC-43likelihood: Medium · High
- Manipulating Writeable Configuration FilesCAPEC-75likelihood: High · Very High
- Manipulating Web Input to File System CallsCAPEC-76likelihood: High · Very High
ATT&CK techniques
—
Change log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
Show all references (3 more)Show less
Vendor advisories and official records. Exploit/PoC links are deliberately left out.