How severe is CVE-2023-26064?

CVE-2023-26064 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-26064 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-26064?

CVE-2023-26064 primarily affects Lexmark Cxtpc Firmware. In total, 26 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-26064?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2023-26064 published?

CVE-2023-26064 was published on 2023-04-10 and last updated on 2026-06-17.

CVE-2023-26064

CVE-2023-26064 is a critical-severity vulnerability in Lexmark Cxtpc Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Lexmark Cxtpc Firmware
Published: 2023-04-10
Last modified: 2026-06-17

Description

Certain Lexmark devices through 2023-02-19 have an Out-of-bounds Write.

Frequently asked questions

What is CVE-2023-26064?: Certain Lexmark devices through 2023-02-19 have an Out-of-bounds Write.
How severe is CVE-2023-26064?: CVE-2023-26064 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-26064 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-26064?: CVE-2023-26064 primarily affects Lexmark Cxtpc Firmware. In total, 26 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-26064?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-26064 published?: CVE-2023-26064 was published on 2023-04-10 and last updated on 2026-06-17.

References

Affected products (26)

cpe:2.3:o:lexmark:cxtpc_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:cstpc_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:mxtct_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:mxtpm_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:cxtmm_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:mslsg_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:mxlsg_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:mslbd_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:mxlbd_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:msngm_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:mxngm_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:mxtgm_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:msngw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:mstgw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:mxtgw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:cslbn_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:cslbl_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:cxlbn_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:cxlbl_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:cstzj_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:csnzj_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:cxtzj_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:lw80_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:lhs60_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:lr_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:lp_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Lexmark Cxtpc Firmware

CVE-2023-26070 — Critical (CVSS 9.8): Certain Lexmark devices through 2023-02-19 mishandle Input Validation (issue 4 of 4).
CVE-2023-26069 — Critical (CVSS 9.8): Certain Lexmark devices through 2023-02-19 mishandle Input Validation (issue 3 of 4).
CVE-2023-26068 — Critical (CVSS 9.8): Certain Lexmark devices through 2023-02-19 mishandle Input Validation (issue 2 of 4).
CVE-2023-26066 — Critical (CVSS 9.8): Certain Lexmark devices through 2023-02-19 have Improper Validation of an Array Index.
CVE-2023-26065 — Critical (CVSS 9.8): Certain Lexmark devices through 2023-02-19 have an Integer Overflow.
CVE-2023-26063 — Critical (CVSS 9.8): Certain Lexmark devices through 2023-02-19 access a Resource By Using an Incompatible Type.

All CVEs affecting Lexmark Cxtpc Firmware →

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