How severe is CVE-2009-2620?

CVE-2009-2620 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2009-2620 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-2620?

CVE-2009-2620 primarily affects Firebirdsql Firebird. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-2620?

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

When was CVE-2009-2620 published?

CVE-2009-2620 was published on 2009-07-29 and last updated on 2026-06-16.

CVE-2009-2620

CVE-2009-2620 is a medium-severity vulnerability in Firebirdsql Firebird with a CVSS 2.0 base score of 5.0. 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: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 9% (94th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Firebirdsql Firebird
Published: 2009-07-29
Last modified: 2026-06-16

Description

src/remote/server.cpp in fbserver.exe in Firebird SQL 1.5 before 1.5.6, 2.0 before 2.0.6, 2.1 before 2.1.3, and 2.5 before 2.5 Beta 2 allows remote attackers to cause a denial of service (daemon crash) via a malformed op_connect_request message that triggers an infinite loop or NULL pointer dereference.

Frequently asked questions

What is CVE-2009-2620?: src/remote/server.cpp in fbserver.exe in Firebird SQL 1.5 before 1.5.6, 2.0 before 2.0.6, 2.1 before 2.1.3, and 2.5 before 2.5 Beta 2 allows remote attackers to cause a denial of service (daemon crash) via a malformed op_connect_request message that triggers an infinite loop or NULL pointer dereference.
How severe is CVE-2009-2620?: CVE-2009-2620 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2009-2620 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-2620?: CVE-2009-2620 primarily affects Firebirdsql Firebird. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-2620?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-2620 published?: CVE-2009-2620 was published on 2009-07-29 and last updated on 2026-06-16.

References

Affected products (4)

cpe:2.3:a:firebirdsql:firebird:*:*:*:*:*:*:*:*
cpe:2.3:a:firebirdsql:firebird:2.5.0:-:*:*:*:*:*:*
cpe:2.3:a:firebirdsql:firebird:2.5.0:alpha1:*:*:*:*:*:*
cpe:2.3:a:firebirdsql:firebird:2.5.0:beta1:*:*:*:*:*:*

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