How severe is CVE-2024-9677?

CVE-2024-9677 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2024-9677 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-9677?

CVE-2024-9677 affects Zyxel Uos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-9677?

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

Does CVE-2024-9677 have an EU (EUVD) identifier?

Yes. CVE-2024-9677 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-50086.

When was CVE-2024-9677 published?

CVE-2024-9677 was published on 2024-10-22 and last updated on 2026-06-17.

CVE-2024-9677

CVE-2024-9677 is a medium-severity vulnerability in Zyxel Uos with a CVSS 3.x base score of 5.5. 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-522.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (5th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-50086
Weakness: CWE-522
Affected product: Zyxel Uos
Published: 2024-10-22
Last modified: 2026-06-17

Description

The insufficiently protected credentials vulnerability in the CLI command of the USG FLEX H series uOS firmware version V1.21 and earlier versions could allow an authenticated local attacker to gain privilege escalation by stealing the authentication token of a login administrator. Note that this attack could be successful only if the administrator has not logged out.

Frequently asked questions

What is CVE-2024-9677?: The insufficiently protected credentials vulnerability in the CLI command of the USG FLEX H series uOS firmware version V1.21 and earlier versions could allow an authenticated local attacker to gain privilege escalation by stealing the authentication token of a login administrator. Note that this attack could be successful only if the administrator has not logged out.
How severe is CVE-2024-9677?: CVE-2024-9677 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2024-9677 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-9677?: CVE-2024-9677 affects Zyxel Uos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-9677?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-9677 have an EU (EUVD) identifier?: Yes. CVE-2024-9677 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-50086.
When was CVE-2024-9677 published?: CVE-2024-9677 was published on 2024-10-22 and last updated on 2026-06-17.

References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-insufficiently-protected-credentials-vulnerability-in-firewalls-10-22-2024

Affected products (1)

cpe:2.3:o:zyxel:uos:*:*:*:*:*:*:*:*

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