How severe is CVE-2009-0418?

CVE-2009-0418 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2009-0418 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0418?

CVE-2009-0418 primarily affects Hp Hp-ux. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-0418?

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

When was CVE-2009-0418 published?

CVE-2009-0418 was published on 2009-02-04 and last updated on 2026-06-16.

CVE-2009-0418

CVE-2009-0418 is a critical-severity vulnerability in Hp Hp-ux with a CVSS 2.0 base score of 9.3. 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-20.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 8% (94th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Hp Hp-ux
Published: 2009-02-04
Last modified: 2026-06-16

Description

The IPv6 Neighbor Discovery Protocol (NDP) implementation in HP HP-UX B.11.11, B.11.23, and B.11.31 does not validate the origin of Neighbor Discovery messages, which allows remote attackers to cause a denial of service (loss of connectivity), read private network traffic, and possibly execute arbitrary code via a spoofed message that modifies the Forward Information Base (FIB), a related issue to CVE-2008-2476.

Frequently asked questions

What is CVE-2009-0418?: The IPv6 Neighbor Discovery Protocol (NDP) implementation in HP HP-UX B.11.11, B.11.23, and B.11.31 does not validate the origin of Neighbor Discovery messages, which allows remote attackers to cause a denial of service (loss of connectivity), read private network traffic, and possibly execute arbitrary code via a spoofed message that modifies the Forward Information Base (FIB), a related issue to CVE-2008-2476.
How severe is CVE-2009-0418?: CVE-2009-0418 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2009-0418 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-0418?: CVE-2009-0418 primarily affects Hp Hp-ux. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-0418?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2009-0418 published?: CVE-2009-0418 was published on 2009-02-04 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:o:hp:hp-ux:b.11.11:*:*:*:*:*:*:*
cpe:2.3:o:hp:hp-ux:b.11.23:*:*:*:*:*:*:*
cpe:2.3:o:hp:hp-ux:b.11.31:*:*:*:*:*:*:*

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