CVE-2007-5636

Exp

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."

Published: 2007-10-23 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2007-5636 is rated High Exploit Risk (81.9/100): CVSS High severity, with high exploitation likelihood (EPSS 25.02%, 96th percentile). 3 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +3.27% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2007-5636

EDB-ID Source Kind Published Link
30678 exploit_db edb 2007-10-18 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2007-5636

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-24 21.75% 25.02% +3.27%
2 2026-01-07 21.95% 21.75% -0.20%
3 2025-08-11 — 21.95% —

Full EPSS history (17 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2007-5636

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2007-5636

Affected software / configurations for CVE-2007-5636

Vendor Product Version Raw CPE
nortel ip_softphone_2050 — cpe:2.3:a:nortel:ip_softphone_2050:*:*:*:*:*:*:*:*

References for CVE-2007-5636

cvelogic Threat Intelligence