CVE-2007-5636

Severity: high (CVSS 7.5 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 6.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2007-10-23 · updated 2026-06-16
Weakness: CWE-119

Description

Buffer overflow in the Nortel UNIStim IP Softphone 2050 allows remote attackers to cause a denial of service (application abort) and possibly execute arbitrary code via a flood of invalid characters to the RTCP port (5678/udp) that triggers a Windows error message, aka "extraneous messaging."

Affected products

Nortel Ip Softphone 2050: all versions

References

http://osvdb.org/38521
http://secunia.com/advisories/27252
http://securityreason.com/securityalert/3271
http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=655203
http://www.csnc.ch/static/advisory/csnc/nortel_UNIStim_IP_softphone_buffer-overflow_v1.0.txt
http://www.securityfocus.com/archive/1/482476/100/0/threaded
http://www.securityfocus.com/bid/26118
http://www.vupen.com/english/advisories/2007/3540
https://exchange.xforce.ibmcloud.com/vulnerabilities/37256
http://osvdb.org/38521
http://secunia.com/advisories/27252
http://securityreason.com/securityalert/3271

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