How severe is CVE-2015-6019?

CVE-2015-6019 has a CVSS 3.x base score of 8.5, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity high, and availability none.

Is CVE-2015-6019 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-6019?

CVE-2015-6019 affects Zyxel Pmg5318-b20a Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-6019?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2015-6019 published?

CVE-2015-6019 was published on 2015-12-31 and last updated on 2026-06-17.

CVE-2015-6019

CVE-2015-6019 is a high-severity vulnerability in Zyxel Pmg5318-b20a Firmware with a CVSS 3.x base score of 8.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 8.5)
CVSS v2: 5.0
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Zyxel Pmg5318-b20a Firmware
Published: 2015-12-31
Last modified: 2026-06-17

Description

The management portal on ZyXEL PMG5318-B20A devices with firmware 1.00AANC0b5 does not terminate sessions upon a logout action, which allows remote attackers to bypass intended access restrictions by leveraging an unattended workstation.

Frequently asked questions

What is CVE-2015-6019?: The management portal on ZyXEL PMG5318-B20A devices with firmware 1.00AANC0b5 does not terminate sessions upon a logout action, which allows remote attackers to bypass intended access restrictions by leveraging an unattended workstation.
How severe is CVE-2015-6019?: CVE-2015-6019 has a CVSS 3.x base score of 8.5, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity high, and availability none.
Is CVE-2015-6019 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-6019?: CVE-2015-6019 affects Zyxel Pmg5318-b20a Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-6019?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2015-6019 published?: CVE-2015-6019 was published on 2015-12-31 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:zyxel:pmg5318-b20a_firmware:v100aanc0b5:*:*:*:*:*:*:*

More vulnerabilities in Zyxel Pmg5318-b20a Firmware

CVE-2015-6018 — Critical (CVSS 9.8): The diagnostic-ping implementation on ZyXEL PMG5318-B20A devices with firmware before 1.00(AANC.2)C0 allows remote…
CVE-2015-6016 — Critical (CVSS 9.8): ZyXEL P-660HW-T1 2 devices with ZyNOS firmware 3.40(AXH.0), PMG5318-B20A devices with firmware 1.00AANC0b5, and…
CVE-2015-6020 — High (CVSS 8.0): ZyXEL PMG5318-B20A devices with firmware 1.00AANC0b5 allow remote authenticated users to obtain administrative…
CVE-2015-7256 — Medium (CVSS 5.9): ZyXEL NWA1100-N, NWA1100-NH, NWA1121-NI, NWA1123-AC, and NWA1123-NI access points; P-660HN-51, P-663HN-51,…

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