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...

5.0 MediumPublic exploit

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.

Exploit likelihood

8.63%Up 1.8 points since Feb 4, 2022

What each source reports

NVD Score used 5.0

Record: CVE-2009-2620
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness: CWE-20
Updated: 2026-11-02

CVE List No score

Record: CVE-2009-2620
Updated: 2026-11-02

EUVDEUVD-2009-2615 No score

Record: EUVD-2009-2615
Updated: 2026-11-03

GitHub AdvisoriesGHSA-rp94-92gp-7q47 No score

src/remote/server.cpp in fbserver.exe in Firebird SQL 1.5 before 1.5.6, 2.0 before 2.0.6, 2.1...

Record: GHSA-rp94-92gp-7q47
Weakness: CWE-20
Updated: 2026-11-02

Affected products

firebirdsql firebird

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
Exploit-DB	Firebird SQL - op_connect_request main listener shutdown	2009-07-28

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, Exploit-DB, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2009-2620 is a medium vulnerability (CVSS 5.0) in Firebirdsql Firebird, published July 29, 2009. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 8.63%, the 95th percentile. No source names a fixed version.