CVE-2023-26067Cslbl Firmware Vulnerability
Certain Lexmark devices through 2023-02-19 mishandle Input Validation (issue 1 of 4).
Published Apr 10, 2023 · Updated Feb 11, 2025
Key Facts
Patch immediately- CVE-2023-26067 is a high-severity vulnerability (CVSS 8.1 v3.1) affecting Cslbl Firmware (Lexmark), Cslbn Firmware (Lexmark), Csnzj Firmware (Lexmark) and 22 more products.
- It is exploited in the wild, listed in CIRCL KEV, Industry KEV feed since Apr 10, 2023. Public exploit code is available.
- EPSS estimates a 38% probability of exploitation in the next 30 days.
- Fixed versions are available, including Cslbl Firmware cslbl.081.232, Cslbn Firmware cslbn.081.232, Csnzj Firmware csnzj.081.232.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v3.1
8.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
38%
Higher than 98.5% of all scored CVEs
Exploit maturity
Weaponized
ATLAS score
51/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Apr 10, 2023
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Weaponized
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
10
Reports of active use
Advisories And Exploit References
Description
Certain Lexmark devices through 2023-02-19 mishandle Input Validation (issue 1 of 4).
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CIRCL KEV | Apr 10, 2023 | n/a | Not reported |
| Industry KEV feed | Apr 10, 2023 | n/a | Not reported |
Affected Products
26 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Cslbl FirmwareLexmark | See advisory | cslbl.081.232 |
| Cslbn FirmwareLexmark | See advisory | cslbn.081.232 |
| Csnzj FirmwareLexmark | See advisory | csnzj.081.232 |
| Cstat FirmwareLexmark | See advisory | cstat.081.233 |
| Cstmh FirmwareLexmark | See advisory | cstmh.081.233 |
Patched Releases
Cslbl Firmware
cslbl.081.232
Cslbn Firmware
cslbn.081.232
Csnzj Firmware
csnzj.081.232
Cstat Firmware
cstat.081.233
Cstmh Firmware
cstmh.081.233
Cstpc Firmware
cstpc.081.232
Cxlbl Firmware
cxlbl.081.232
Cxlbn Firmware
cxlbn.081.232
Cxnzj Firmware
cxnzj.081.232
Cxtat Firmware
cxtat.081.233
Cxtmm Firmware
cxtmm.081.232
Cxtpc Firmware
cxtpc.081.232
Cxtpp Firmware
cxtpp.081.233
Cxtzj Firmware
cxtzj.081.232
Mslbd Firmware
mslbd.081.232
Mslsg Firmware
mslsg.081.232
Msngm Firmware
msngm.081.232
Msngw Firmware
msngw.081.232
Mstgw Firmware
mstgw.081.232
Mxlbd Firmware
mxlbd.081.232
Mxlsg Firmware
mxlsg.081.232
Mxngm Firmware
mxngm.081.232
Mxtct Firmware
mxtct.081.232
Mxtgm Firmware
mxtgm.081.232
Mxtgw Firmware
mxtgw.081.232
Timeline
Publicly disclosed
Apr 10, 2023
Added to CIRCL KEV
Apr 10, 2023
Added to Industry KEV feed
Apr 10, 2023
Last updated
Feb 11, 2025
Weakness Type
- CWE-20 Improper Input Validation
References
- advisorypublications.lexmark.com · CVE-2023-26067
- advisorysupport.lexmark.com · alerts
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
Certain Lexmark devices through 2023-02-19 mishandle Input Validation (issue 1 of 4).
Affected: Cslbl Firmware (Lexmark); Cslbn Firmware (Lexmark); Csnzj Firmware (Lexmark), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CIRCL KEV, Industry KEV feed since Apr 10, 2023.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Cslbl Firmware cslbl.081.232, Cslbn Firmware cslbn.081.232, Csnzj Firmware csnzj.081.232.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2023-26067 On Your Attack Surface?
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