How severe is CVE-2009-0921?

CVE-2009-0921 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2009-0921 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 13% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0921?

CVE-2009-0921 primarily affects Hp Network Node Manager. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-0921?

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-2009-0921 published?

CVE-2009-0921 was published on 2009-03-25 and last updated on 2026-06-16.

CVE-2009-0921

CVE-2009-0921 is a critical-severity vulnerability in Hp Network Node Manager with a CVSS 2.0 base score of 10.0. Its EPSS exploit-prediction score of 13% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-119.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 13% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Hp Network Node Manager
Published: 2009-03-25
Last modified: 2026-06-16

Description

Multiple heap-based buffer overflows in OvCgi/Toolbar.exe in HP OpenView Network Node Manager (OV NNM) 7.01, 7.51, and 7.53 allow remote attackers to execute arbitrary code via (1) a long OvAcceptLang cookie, which triggers the error in ov.dll and ovwww.dll, or (2) a long Accept-Language HTTP header, which triggers the error in ovwww.dll or libovwww.so.4.

Frequently asked questions

What is CVE-2009-0921?: Multiple heap-based buffer overflows in OvCgi/Toolbar.exe in HP OpenView Network Node Manager (OV NNM) 7.01, 7.51, and 7.53 allow remote attackers to execute arbitrary code via (1) a long OvAcceptLang cookie, which triggers the error in ov.dll and ovwww.dll, or (2) a long Accept-Language HTTP header, which triggers the error in ovwww.dll or libovwww.so.4.
How severe is CVE-2009-0921?: CVE-2009-0921 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2009-0921 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 13% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-0921?: CVE-2009-0921 primarily affects Hp Network Node Manager. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-0921?: 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-2009-0921 published?: CVE-2009-0921 was published on 2009-03-25 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:a:hp:network_node_manager:7.0.1:*:*:*:*:*:*:*
cpe:2.3:a:hp:network_node_manager:7.5.1:*:*:*:*:*:*:*
cpe:2.3:a:hp:network_node_manager:7.5.3:*:*:*:*:*:*:*

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