How severe is CVE-2024-38266?

CVE-2024-38266 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2024-38266 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-38266?

CVE-2024-38266 primarily affects Zyxel Dx3300-t0 Firmware. In total, 42 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-38266?

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

Does CVE-2024-38266 have an EU (EUVD) identifier?

Yes. CVE-2024-38266 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-37231.

When was CVE-2024-38266 published?

CVE-2024-38266 was published on 2024-09-24 and last updated on 2026-06-17.

CVE-2024-38266

CVE-2024-38266 is a medium-severity vulnerability in Zyxel Dx3300-t0 Firmware with a CVSS 3.x base score of 4.9. 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-787.

Key facts

Severity: Medium (CVSS 3.x base score 4.9)
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-37231
Weakness: CWE-787
Affected product: Zyxel Dx3300-t0 Firmware
Published: 2024-09-24
Last modified: 2026-06-17

Description

An improper restriction of operations within the bounds of a memory buffer in the parameter type parser of the Zyxel VMG8825-T50K firmware versions through 5.50(ABOM.8)C0 could allow an authenticated attacker with administrator privileges to cause potential memory corruptions, resulting in a thread crash on an affected device.

Frequently asked questions

What is CVE-2024-38266?: An improper restriction of operations within the bounds of a memory buffer in the parameter type parser of the Zyxel VMG8825-T50K firmware versions through 5.50(ABOM.8)C0 could allow an authenticated attacker with administrator privileges to cause potential memory corruptions, resulting in a thread crash on an affected device.
How severe is CVE-2024-38266?: CVE-2024-38266 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2024-38266 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-38266?: CVE-2024-38266 primarily affects Zyxel Dx3300-t0 Firmware. In total, 42 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-38266?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-38266 have an EU (EUVD) identifier?: Yes. CVE-2024-38266 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-37231.
When was CVE-2024-38266 published?: CVE-2024-38266 was published on 2024-09-24 and last updated on 2026-06-17.

References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-post-authentication-memory-corruption-vulnerabilities-in-some-dsl-ethernet-cpe-fiber-ont-wifi-extender-and-security-router-versions-09-24-2024

Affected products (42)

cpe:2.3:o:zyxel:dx3300-t0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:dx3300-t1_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:dx3301-t0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:dx4510-b0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:dx4510-b1_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:dx5401-b0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:dx5401-b1_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:ex3300-t0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:ex3300-t1_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:ex3301-t0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:ex3500-t0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:ex3501-t0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:ex3510-b0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:ex3510-b1_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:ex3600-t0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:ex5401-b0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:ex5401-b1_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:ex5510-b0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:ex5512-t0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:ex5601-t0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:ex5601-t1_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:ex7501-b0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:ex7710-b0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:emg3525-t50b_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:emg5523-t50b_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:emg5723-t50k_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:vmg3625-t50b_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:vmg3927-t50k_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:vmg4005-b50a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:vmg4005-b60a_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:vmg8623-t50b_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:vmg8825-t50k_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:ax7501-b0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:ax7501-b1_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:pm3100-t0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:pm5100-t0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:pm7300-t0_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:px3321-t1_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:scr50axe_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:wx3100-t0_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Zyxel Dx3300-t0 Firmware

CVE-2025-13943 — High (CVSS 8.8): A post-authentication command injection vulnerability in the log file download function of the Zyxel EX3301-T0 firmware…
CVE-2025-8693 — High (CVSS 8.8): A post-authentication command injection vulnerability in the "priv" parameter of Zyxel DX3300-T0 firmware version…
CVE-2024-8748 — High (CVSS 7.5): A buffer overflow vulnerability in the packet parser of the third-party library "libclinkc" in Zyxel VMG8825-T50K…
CVE-2024-5412 — High (CVSS 7.5): A buffer overflow vulnerability in the library "libclinkc" of the Zyxel VMG8825-T50K firmware version 5.50(ABOM.8)C0…
CVE-2026-1460 — High (CVSS 7.2): A post-authentication command injection vulnerability in the “DomainName” parameter of the DHCP configuration file…
CVE-2024-12010 — High (CVSS 7.2): A post-authentication command injection vulnerability in the ”zyUtilMailSend” function of the Zyxel AX7501-B1…

All CVEs affecting Zyxel Dx3300-t0 Firmware →

Other CWE-787 (Out-of-bounds Write) vulnerabilities

CVE-2026-42369 — Critical (CVSS 10.0): GV-VMS V20 is a Video Monitoring Software used to gather the feeds of many surveillance cameras and manage other…
CVE-2026-4746 — Critical (CVSS 10.0): Out-of-bounds Write vulnerability in timeplus-io proton (base/poco/Foundation/src‎ modules). This vulnerability is…
CVE-2025-43300 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 15.8.5 and iPadOS…
CVE-2025-24201 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved checks to prevent unauthorized actions. This issue is fixed in…
CVE-2024-42479 — Critical (CVSS 10.0): llama.cpp provides LLM inference in C/C++. The unsafe `data` pointer member in the `rpc_tensor` structure can cause…
CVE-2024-39791 — Critical (CVSS 10.0): Stack-based buffer overflow vulnerabilities affecting Vonets industrial wifi bridge relays and wifi bridge…

Browse all CWE-787 (Out-of-bounds Write) vulnerabilities →