Vulnerability record · CVE-2009-3704 · published 16 October 2009

CVE-2009-3704: Zoiper vulnerability

Zoiper · Zoiper

ZoIPer 2.22, and possibly other versions before 2.24 Library 5324, allows remote attackers to cause a denial of service (crash) via a SIP INVITE request with an empty Call-Info header.

5.0 CVSS 2.0 Medium EPSS 8.1% · top 5.3%

5.0CVSS 2.0 base score

8.1%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

6References, 2 tagged exploit

16 Jun 2026Last modified by NVD

Description

ZoIPer 2.22, and possibly other versions before 2.24 Library 5324, allows remote attackers to cause a denial of service (crash) via a SIP INVITE request with an empty Call-Info header.

AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Zoiper Zoiper

References

Link	Tags
http://packetstormsecurity.org/0910-exploits/zoiper_dos.py.txt	Exploit
http://secunia.com/advisories/37015	Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/53792
http://packetstormsecurity.org/0910-exploits/zoiper_dos.py.txt	Exploit
http://secunia.com/advisories/37015	Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/53792

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Source: NIST National Vulnerability Database (record CVE-2009-3704), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.