How severe is CVE-2024-36845?

CVE-2024-36845 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2024-36845 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-36845?

CVE-2024-36845 affects Libmodbus. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-36845?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-36845 have an EU (EUVD) identifier?

Yes. CVE-2024-36845 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-36229.

When was CVE-2024-36845 published?

CVE-2024-36845 was published on 2024-05-31 and last updated on 2026-06-17.

CVE-2024-36845

CVE-2024-36845 is a medium-severity vulnerability in Libmodbus with a CVSS 3.x base score of 4.3. 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-400.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-36229
Weakness: CWE-400
Affected product: Libmodbus
Published: 2024-05-31
Last modified: 2026-06-17

Description

An invalid pointer in the modbus_receive() function of libmodbus v3.1.6 allows attackers to cause a Denial of Service (DoS) via a crafted message sent to the unit-test-server.

Frequently asked questions

What is CVE-2024-36845?: An invalid pointer in the modbus_receive() function of libmodbus v3.1.6 allows attackers to cause a Denial of Service (DoS) via a crafted message sent to the unit-test-server.
How severe is CVE-2024-36845?: CVE-2024-36845 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2024-36845 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-36845?: CVE-2024-36845 affects Libmodbus. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-36845?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-36845 have an EU (EUVD) identifier?: Yes. CVE-2024-36845 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-36229.
When was CVE-2024-36845 published?: CVE-2024-36845 was published on 2024-05-31 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:libmodbus:libmodbus:3.1.6:*:*:*:*:*:*:*

More vulnerabilities in Libmodbus

CVE-2023-26793 — Critical (CVSS 9.8): libmodbus v3.1.10 has a heap-based buffer overflow vulnerability in read_io_status function in src/modbus.c.
CVE-2019-14463 — Critical (CVSS 9.1): An issue was discovered in libmodbus before 3.0.7 and 3.1.x before 3.1.5. There is an out-of-bounds read for the…
CVE-2019-14462 — Critical (CVSS 9.1): An issue was discovered in libmodbus before 3.0.7 and 3.1.x before 3.1.5. There is an out-of-bounds read for the…
CVE-2022-0367 — High (CVSS 7.8): A heap-based buffer overflow flaw was found in libmodbus in function modbus_reply() in src/modbus.c.
CVE-2024-36844 — High (CVSS 7.5): libmodbus v3.1.6 was discovered to contain a use-after-free via the ctx->backend pointer. This vulnerability allows…
CVE-2024-36843 — High (CVSS 7.5): libmodbus v3.1.6 was discovered to contain a heap overflow via the modbus_mapping_free() function.

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