How severe is CVE-2022-43501?

CVE-2022-43501 has a CVSS 3.x base score of 9.1, 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 none.

Is CVE-2022-43501 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-43501?

CVE-2022-43501 primarily affects Elwsc Kasago Ipv4. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-43501?

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-2022-43501 published?

CVE-2022-43501 was published on 2023-02-10 and last updated on 2026-06-17.

CVE-2022-43501

CVE-2022-43501 is a critical-severity vulnerability in Elwsc Kasago Ipv4 with a CVSS 3.x base score of 9.1. 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-330.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-330
Affected product: Elwsc Kasago Ipv4
Published: 2023-02-10
Last modified: 2026-06-17

Description

KASAGO TCP/IP stack provided by Zuken Elmic generates ISNs(Initial Sequence Number) for TCP connections from an insufficiently random source. An attacker may be able to determine the ISN of the current or future TCP connections and either hijack existing ones or spoof future ones.

Frequently asked questions

What is CVE-2022-43501?: KASAGO TCP/IP stack provided by Zuken Elmic generates ISNs(Initial Sequence Number) for TCP connections from an insufficiently random source. An attacker may be able to determine the ISN of the current or future TCP connections and either hijack existing ones or spoof future ones.
How severe is CVE-2022-43501?: CVE-2022-43501 has a CVSS 3.x base score of 9.1, 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 none.
Is CVE-2022-43501 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-43501?: CVE-2022-43501 primarily affects Elwsc Kasago Ipv4. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-43501?: 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-2022-43501 published?: CVE-2022-43501 was published on 2023-02-10 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:elwsc:kasago_ipv4:*:*:*:*:*:*:*:*
cpe:2.3:a:elwsc:kasago_ipv4_light:*:*:*:*:*:*:*:*
cpe:2.3:a:elwsc:kasago_ipv6\/v4_dual:*:*:*:*:*:*:*:*
cpe:2.3:a:elwsc:kasago_mobile_ipv6:*:*:*:*:*:*:*:*

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