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CVE-2021-44738

33
FAUCET Score

CVE-2021-44738 is a critical buffer overflow vulnerability affecting Lexmark devices through 2021-12-07, specifically within their postscript interpreter. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network with low attack complexity and no user interaction, potentially leading to complete compromise of confidentiality, integrity, and availability. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion, indicating awareness and potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
< mslsg.076.294CPE matchmatch criteria
cpe:2.3:o:lexmark:b2236_firmware:*:*:*:*:*:*:*:*
< mxlsg.076.294CPE matchmatch criteria
cpe:2.3:o:lexmark:mb2236_firmware:*:*:*:*:*:*:*:*
< mslbd.076.294CPE matchmatch criteria
cpe:2.3:o:lexmark:ms431_firmware:*:*:*:*:*:*:*:*
< mslbd.076.294CPE matchmatch criteria
cpe:2.3:o:lexmark:ms331_firmware:*:*:*:*:*:*:*:*
< mslbd.076.294CPE matchmatch criteria
cpe:2.3:o:lexmark:m1342_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.31%
Probability of exploitation in next 30 days
EPSS Percentile
87.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0331 is in the 79th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

support.lexmark.com / alerts
Vendor Advisory
zerodayinitiative.com / advisories/ZDI-22-327
Third Party AdvisoryVDB Entry
zerodayinitiative.com / advisories/ZDI-22-328
Third Party AdvisoryVDB Entry
zerodayinitiative.com / advisories/ZDI-22-382
Third Party AdvisoryVDB Entry