How severe is CVE-2018-15520?

CVE-2018-15520 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-2018-15520 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-15520?

CVE-2018-15520 primarily affects Lexmark Cx82x Firmware. In total, 34 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-15520?

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-2018-15520 published?

CVE-2018-15520 was published on 2019-06-28 and last updated on 2026-06-17.

CVE-2018-15520

CVE-2018-15520 is a critical-severity vulnerability in Lexmark Cx82x 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-119.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Lexmark Cx82x Firmware
Published: 2019-06-28
Last modified: 2026-06-17

Description

Various Lexmark devices have a Buffer Overflow (issue 2 of 2).

Frequently asked questions

What is CVE-2018-15520?: Various Lexmark devices have a Buffer Overflow (issue 2 of 2).
How severe is CVE-2018-15520?: CVE-2018-15520 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-2018-15520 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-15520?: CVE-2018-15520 primarily affects Lexmark Cx82x Firmware. In total, 34 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-15520?: 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-2018-15520 published?: CVE-2018-15520 was published on 2019-06-28 and last updated on 2026-06-17.

References

http://support.lexmark.com/index?page=content&id=TE892

Affected products (34)

cpe:2.3:o:lexmark:cx82x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:cx860_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:xc6152_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:xc8155_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:xc8160_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:cx72x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:xc41x0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:cx92x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:xc92x5_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:mx321_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:mb2338_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:mx42x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:mx52x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:mx622_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:mb2442_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:mb2546_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:mb2650_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:xm124x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:xm3250_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:mx72x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:mx82x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:mb2770_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:xm5370_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:xm7355_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:xm7370_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:cx421_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:mc2325_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:mc2425_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:cx522_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:cx62x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:mc2535_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:mc2640_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:xc2235_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lexmark:xc4240_firmware:*:*:*:*:*:*:*:*

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