CVE-2009-2620

mediumpriority · track · 33EPSS 0.086 · 95 %ileexploit · functionalEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · functional

Likely / severe?

8.63% (95th) EPSS

CVSS 5 · medium

Is it mine?

5 products

Check your exposure

Who says so?

2 sources

enisa_euvd · nvd

EPSS · scored 2026-10-28

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.

cvss

Technical severity, 0–10. One row per scoring source.

5.0

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v2.04.5mediumAV:N/AC:L/Au:N/C:N/I:N/A:P/E:POCsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USprimary

exploits (1)

Public proof-of-concept and weaponised exploit code.

EDB-9295Firebird SQL - op_connect_request main listener shutdownfunctional · exploit_db

affected products (5)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
firebirdsql firebird1.5 → 1.5.6nvdUScpe:2.3:a:firebirdsql:firebird:*:*:*:*:*:*:*:*
firebirdsql firebird2.0.0 → 2.0.6nvdUScpe:2.3:a:firebirdsql:firebird:*:*:*:*:*:*:*:*
firebirdsql firebird2.1 → 2.1.3nvdUScpe:2.3:a:firebirdsql:firebird:*:*:*:*:*:*:*:*
firebirdsql firebird= 2.5.0nvdUScpe:2.3:a:firebirdsql:firebird:*:*:*:*:*:*:*:*

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd nvd NVD CVE.org MITRE

published 2009-07-29modified 2026-06-16

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references (14)

External citations — patches, advisories, analysis.

scry

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