How severe is CVE-2024-38270?

CVE-2024-38270 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2024-38270 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-38270?

CVE-2024-38270 primarily affects Zyxel Gs1900-48hpv2 Firmware. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-38270?

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

Does CVE-2024-38270 have an EU (EUVD) identifier?

Yes. CVE-2024-38270 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-37235.

When was CVE-2024-38270 published?

CVE-2024-38270 was published on 2024-09-10 and last updated on 2026-06-17.

CVE-2024-38270

CVE-2024-38270 is a medium-severity vulnerability in Zyxel Gs1900-48hpv2 Firmware with a CVSS 3.x base score of 5.3. 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-331.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (12th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-37235
Weakness: CWE-331
Affected product: Zyxel Gs1900-48hpv2 Firmware
Published: 2024-09-10
Last modified: 2026-06-17

Description

An insufficient entropy vulnerability caused by the improper use of a randomness function with low entropy for web authentication tokens generation exists in the Zyxel GS1900-10HP firmware version V2.80(AAZI.0)C0. This vulnerability could allow a LAN-based attacker a slight chance to gain a valid session token if multiple authenticated sessions are alive.

Frequently asked questions

What is CVE-2024-38270?: An insufficient entropy vulnerability caused by the improper use of a randomness function with low entropy for web authentication tokens generation exists in the Zyxel GS1900-10HP firmware version V2.80(AAZI.0)C0. This vulnerability could allow a LAN-based attacker a slight chance to gain a valid session token if multiple authenticated sessions are alive.
How severe is CVE-2024-38270?: CVE-2024-38270 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2024-38270 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-38270?: CVE-2024-38270 primarily affects Zyxel Gs1900-48hpv2 Firmware. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-38270?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-38270 have an EU (EUVD) identifier?: Yes. CVE-2024-38270 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-37235.
When was CVE-2024-38270 published?: CVE-2024-38270 was published on 2024-09-10 and last updated on 2026-06-17.

References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-insufficient-entropy-vulnerability-for-web-authentication-tokens-generation-in-gs1900-series-switches-09-10-2024

Affected products (10)

cpe:2.3:o:zyxel:gs1900-48hpv2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:gs1900-48_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:gs1900-24hpv2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:gs1900-24ep_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:gs1900-24e_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:gs1900-24_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:gs1900-16_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:gs1900-10hp_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:gs1900-8hp_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:gs1900-8_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Zyxel Gs1900-48hpv2 Firmware

CVE-2024-8881 — Medium (CVSS 6.8): A post-authentication command injection vulnerability in the CGI program in the Zyxel GS1900-48 switch firmware version…
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CVE-2022-45853 — Medium (CVSS 6.7): The privilege escalation vulnerability in the Zyxel GS1900-8 firmware version V2.70(AAHH.3) and the GS1900-8HP…
CVE-2021-35032 — Medium (CVSS 6.4): A vulnerability in the 'libsal.so' of the Zyxel GS1900 series firmware version 2.60 could allow an authenticated local…
CVE-2022-34746 — Medium (CVSS 5.9): An insufficient entropy vulnerability caused by the improper use of randomness sources with low entropy for RSA key…
CVE-2023-35140 — Medium (CVSS 5.5): The improper privilege management vulnerability in the Zyxel GS1900-24EP switch firmware version V2.70(ABTO.5) could…

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