CVE-2024-8748: A buffer overflow vulnerability in the packet parser of the third-party library "libclinkc" in Zyxel VMG8825-T

Q: How do I fix CVE-2024-8748?

lte3301-plus firmware: mitigate or apply the listed mitigation; lte5388-m804 firmware: mitigate or apply the listed mitigation; lte5398-m904 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2024-8748 being exploited?

CVE-2024-8748 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2024-8748 affect?

CVE-2024-8748 affects lte3301-plus firmware, lte5388-m804 firmware, lte5398-m904 firmware. Severity is high (CVSS 7.5). A buffer overflow vulnerability in the packet parser of the third-party library "libclinkc" in Zyxel VMG8825-T50K firmware versions through V5.50(ABOM.8.4)C0 could allow an attacker to cause a temporary denial of service (DoS) condition aga

Q: How urgent is CVE-2024-8748?

Priority 42/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEMITIGATEMITIGATEMITIGATE

CVE-2024-8748 is a high-severity flaw (CVSS 7.5) affecting lte3301-plus firmware, lte5388-m804 firmware, lte5398-m904 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A buffer overflow vulnerability in the packet parser of the third-party library "libclinkc" in Zyxel VMG8825-T50K firmware versions through V5.50(ABOM.8.4)C0 could allow an attacker to cause a temporary denial of service (DoS) condition against the web management interface by sending a crafted HTTP POST request to a vulnerable device.

Why this priority

High severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 56%)
CISA exploited list	No
Weakness	CWE-120
Published	2024-12-03
Last modified	2026-06-17

Publisher (CNA): Zyxel Corporation · Vendor: zyxel

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-12-03 02:15 UTCPublished CVE record published
2026-06-17 08:23 UTCUpdated Record last modified

zyxel lte3301-plus firmware MITIGATE

Affected: < 1.00\(abqu.6\)c0

Fixed in: 1.00\(abqu.6\)c0

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

zyxel lte5388-m804 firmware MITIGATE

Affected: < 1.00\(absq.5\)c0

Fixed in: 1.00\(absq.5\)c0

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

zyxel lte5398-m904 firmware MITIGATE

Affected: < 1.00\(abq.5\)c0

Fixed in: 1.00\(abq.5\)c0

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

zyxel lte7480-m804 firmware MITIGATE

Affected: < 1.00\(abra.10\)c0

Fixed in: 1.00\(abra.10\)c0

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

zyxel lte7490-m904 firmware MITIGATE

Affected: < 1.00\(abqy.9\)c0

Fixed in: 1.00\(abqy.9\)c0

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

zyxel nr7101 firmware MITIGATE

Affected: < 1.00\(abu.11\)c0

Fixed in: 1.00\(abu.11\)c0

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-8748?

lte3301-plus firmware: mitigate or apply the listed mitigation; lte5388-m804 firmware: mitigate or apply the listed mitigation; lte5398-m904 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-8748 being exploited?

CVE-2024-8748 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-8748 affect?

CVE-2024-8748 affects lte3301-plus firmware, lte5388-m804 firmware, lte5398-m904 firmware. Severity is high (CVSS 7.5). A buffer overflow vulnerability in the packet parser of the third-party library "libclinkc" in Zyxel VMG8825-T50K firmware versions through V5.50(ABOM.8.4)C0 could allow an attacker to cause a temporary denial of service (DoS) condition aga

How urgent is CVE-2024-8748?

Priority 42/100. High severity; Remotely exploitable, no login, no user action

Software pages

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References

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