How severe is CVE-2023-39540?

CVE-2023-39540 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-39540 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-39540?

CVE-2023-39540 affects Weston-embedded Uc-tcp-ip. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-39540?

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

Does CVE-2023-39540 have an EU (EUVD) identifier?

Yes. CVE-2023-39540 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-43250.

When was CVE-2023-39540 published?

CVE-2023-39540 was published on 2024-02-20 and last updated on 2026-06-17.

CVE-2023-39540

CVE-2023-39540 is a medium-severity vulnerability in Weston-embedded Uc-tcp-ip with a CVSS 3.x base score of 5.9. 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-125.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-43250
Weakness: CWE-125
Affected product: Weston-embedded Uc-tcp-ip
Published: 2024-02-20
Last modified: 2026-06-17

Description

A denial of service vulnerability exists in the ICMP and ICMPv6 parsing functionality of Weston Embedded uC-TCP-IP v3.06.01. A specially crafted network packet can lead to an out-of-bounds read. An attacker can send a malicious packet to trigger this vulnerability.This vulnerability concerns a denial of service within the parsing an IPv4 ICMP packet.

Frequently asked questions

What is CVE-2023-39540?: A denial of service vulnerability exists in the ICMP and ICMPv6 parsing functionality of Weston Embedded uC-TCP-IP v3.06.01. A specially crafted network packet can lead to an out-of-bounds read. An attacker can send a malicious packet to trigger this vulnerability.This vulnerability concerns a denial of service within the parsing an IPv4 ICMP packet.
How severe is CVE-2023-39540?: CVE-2023-39540 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-39540 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-39540?: CVE-2023-39540 affects Weston-embedded Uc-tcp-ip. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-39540?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2023-39540 have an EU (EUVD) identifier?: Yes. CVE-2023-39540 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-43250.
When was CVE-2023-39540 published?: CVE-2023-39540 was published on 2024-02-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:weston-embedded:uc-tcp-ip:3.06.01:*:*:*:*:*:*:*

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