How severe is CVE-2009-3423?

CVE-2009-3423 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2009-3423 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-3423?

CVE-2009-3423 affects Zenas Paolink. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2009-3423?

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

When was CVE-2009-3423 published?

CVE-2009-3423 was published on 2009-09-25 and last updated on 2026-06-16.

CVE-2009-3423

CVE-2009-3423 is a medium-severity vulnerability in Zenas Paolink with a CVSS 2.0 base score of 6.8. 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-287.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 3% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Zenas Paolink
Published: 2009-09-25
Last modified: 2026-06-16

Description

login.php in Zenas PaoLink 1.0, when register_globals is enabled, allows remote attackers to bypass authentication and gain administrative access by setting the login_ok parameter to 1.

Frequently asked questions

What is CVE-2009-3423?: login.php in Zenas PaoLink 1.0, when register_globals is enabled, allows remote attackers to bypass authentication and gain administrative access by setting the login_ok parameter to 1.
How severe is CVE-2009-3423?: CVE-2009-3423 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2009-3423 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-3423?: CVE-2009-3423 affects Zenas Paolink. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2009-3423?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-3423 published?: CVE-2009-3423 was published on 2009-09-25 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:zenas:paolink:1.0:*:*:*:*:*:*:*

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