Is CVE-2009-0921 in the CISA KEV catalog?

No. CVE-2009-0921 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2009-0921?

CVE-2009-0921 has a CVSS v2 base score of 10.0 (HIGH).

What is the EPSS score for CVE-2009-0921?

CVE-2009-0921 has an EPSS score of 13.24% (96th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2009-0921

HIGHEPSS 96th pctl

10.0

CVSS v2

NVD

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.

CWE-119Buffer Overflow

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

13.24%probability of exploitation in 30 days

96thpercentile

Very high risk: more likely to be exploited than 96% of all known CVEs.

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-23.