A buffer overflow vulnerability in the Zyxel ATP series firmware version 5.37, USG FLEX series firmware version 5.37, USG FLEX 50(W) series firmware version 5.37, and USG20(W)-VPN series firmware version 5.37, could allow an authenticated local attacker with administrator privileges to cause denial-of-service (DoS) conditions by executing the CLI command with crafted strings on an affected device
Published Nov 28, 2023
4.4
MEDIUMCVSS 3.1
EPSS 0.23%
Description
A buffer overflow vulnerability in the Zyxel ATP series firmware version 5.37, USG FLEX series firmware version 5.37, USG FLEX 50(W) series firmware version 5.37, and USG20(W)-VPN series firmware version 5.37, could allow an authenticated local attacker with administrator privileges to cause denial-of-service (DoS) conditions by executing the CLI command with crafted strings on an affected device.
Affected products
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- Version 5.37StatusaffectedConstraints-
- Version
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- Version 5.37StatusaffectedConstraints-
- Version
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- Version 5.37StatusaffectedConstraints-
- Version
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- Version 5.37StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Zyxel | ATP series firmware | unaffected |
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| Zyxel | USG FLEX 50(W) series firmware | unaffected |
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| Zyxel | USG FLEX series firmware | unaffected |
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| Zyxel | USG20(W)-VPN series firmware | unaffected |
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Configuration 1
Configuration 2
Running on/with
- n/a
- n/a
- n/a
- n/a
- n/a
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No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2023–2026- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (5 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.23% (0.00233) | 12.88th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.23% (0.00233) | 13.92th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.04% (0.00038) | 8.11th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00042) | 5.07th | v3 (v2023.03.01) |
| Nov 28, 2023 | 0.04% (0.00042) | 5.72th | v3 (v2023.03.01) |
References (1)
- https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-aps vendor-advisoryVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-aps | vendor-advisoryVendor Advisory |
Change history (0)
No recorded changes yet.