How severe is CVE-2018-20033?

CVE-2018-20033 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-2018-20033 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-20033?

CVE-2018-20033 primarily affects Flexera Flexnet Publisher. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-20033?

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-2018-20033 published?

CVE-2018-20033 was published on 2019-02-25 and last updated on 2026-06-17.

CVE-2018-20033

CVE-2018-20033 is a critical-severity vulnerability in Flexera Flexnet Publisher 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-770.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 4% (88th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-770
Affected product: Flexera Flexnet Publisher
Published: 2019-02-25
Last modified: 2026-06-17

Description

A Remote Code Execution vulnerability in lmgrd and vendor daemon components of FlexNet Publisher version 11.16.1.0 and earlier could allow a remote attacker to corrupt the memory by allocating / deallocating memory, loading lmgrd or the vendor daemon and causing the heartbeat between lmgrd and the vendor daemon to stop. This would force the vendor daemon to shut down. No exploit of this vulnerability has been demonstrated.

Frequently asked questions

What is CVE-2018-20033?: A Remote Code Execution vulnerability in lmgrd and vendor daemon components of FlexNet Publisher version 11.16.1.0 and earlier could allow a remote attacker to corrupt the memory by allocating / deallocating memory, loading lmgrd or the vendor daemon and causing the heartbeat between lmgrd and the vendor daemon to stop. This would force the vendor daemon to shut down. No exploit of this vulnerability has been demonstrated.
How severe is CVE-2018-20033?: CVE-2018-20033 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-2018-20033 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20033?: CVE-2018-20033 primarily affects Flexera Flexnet Publisher. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-20033?: 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-2018-20033 published?: CVE-2018-20033 was published on 2019-02-25 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:flexera:flexnet_publisher:*:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_lsms:*:*:*:*:*:*:*:*

More vulnerabilities in Flexera Flexnet Publisher

CVE-2019-8963 — High (CVSS 7.5): A Denial of Service (DoS) vulnerability was discovered in FlexNet Publisher's lmadmin 11.16.5, when doing a crafted…
CVE-2020-12080 — High (CVSS 7.5): A Denial of Service vulnerability has been identified in FlexNet Publisher's lmadmin.exe version 11.16.6. A certain…
CVE-2020-12081 — High (CVSS 7.5): An information disclosure vulnerability has been identified in FlexNet Publisher lmadmin.exe 11.14.0.2. The web portal…
CVE-2019-8961 — High (CVSS 7.5): A Denial of Service vulnerability related to stack exhaustion has been identified in FlexNet Publisher lmadmin.exe…
CVE-2019-8960 — High (CVSS 7.5): A Denial of Service vulnerability related to command handling has been identified in FlexNet Publisher lmadmin.exe…
CVE-2018-20034 — High (CVSS 7.5): A Denial of Service vulnerability related to adding an item to a list in lmgrd and vendor daemon components of FlexNet…

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