HIGH
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 Oct 23, 2007
7.5
HIGHCVSS 2.0
EPSS 6.69%
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
No data.
- n/a
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
7.5 HIGH NVD
AV:N/AC:L/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
6.69% 0.06685
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.06685
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (18 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 6.69% (0.06685) | 93.70th | v5 (v2026.06.15) |
| Jun 15, 2026 | 6.69% (0.06685) | 93.03th | v5 (v2026.06.15) |
| Mar 24, 2026 | 25.02% (0.25021) | 96.11th | v4 (v2025.03.14) |
| Aug 11, 2025 | 21.95% (0.21949) | 95.52th | v4 (v2025.03.14) |
| Jul 12, 2025 | 25.12% (0.25118) | 95.93th | v4 (v2025.03.14) |
| Apr 9, 2025 | 17.82% (0.17818) | 94.61th | v4 (v2025.03.14) |
| Mar 30, 2025 | 25.12% (0.25118) | 95.72th | v4 (v2025.03.14) |
| Mar 29, 2025 | 19.12% (0.19120) | 92.36th | v4 (v2025.03.14) |
| Mar 19, 2025 | 25.12% (0.25118) | 95.52th | v4 (v2025.03.14) |
| Mar 17, 2025 | 22.55% (0.22546) | 95.39th | v4 (v2025.03.14) |
| Dec 17, 2024 | 42.25% (0.42247) | 97.37th | v3 (v2023.03.01) |
| Jul 19, 2024 | 20.09% (0.20088) | 96.39th | v3 (v2023.03.01) |
| Jun 11, 2024 | 20.35% (0.20354) | 96.37th | v3 (v2023.03.01) |
| May 4, 2024 | 24.80% (0.24802) | 96.63th | v3 (v2023.03.01) |
| Jan 12, 2024 | 24.33% (0.24328) | 96.18th | v3 (v2023.03.01) |
| Mar 7, 2023 | 26.97% (0.26975) | 96.01th | v3 (v2023.03.01) |
| Mar 6, 2023 | 35.20% (0.35205) | 97.82th | v2 (v2022.01.01) |
| Feb 4, 2022 | 35.20% (0.35205) | 96.79th | v2 (v2022.01.01) |
Weaknesses (1)
References (9)
- http://osvdb.org/38521 vdb-entryx_refsource_OSVDB
- http://secunia.com/advisories/27252 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://securityreason.com/securityalert/3271 third-party-advisoryx_refsource_SREASON
- http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=655203 x_refsource_CONFIRM
- http://www.csnc.ch/static/advisory/csnc/nortel_UNIStim_IP_softphone_buffer-overflow_v1.0.txt x_refsource_MISCExploit
- http://www.securityfocus.com/archive/1/482476/100/0/threaded mailing-listx_refsource_BUGTRAQ
- http://www.securityfocus.com/bid/26118 vdb-entryx_refsource_BIDExploit
- http://www.vupen.com/english/advisories/2007/3540 vdb-entryx_refsource_VUPEN
- https://exchange.xforce.ibmcloud.com/vulnerabilities/37256 vdb-entryx_refsource_XF
| Link | Providers | Tags |
|---|---|---|
| http://osvdb.org/38521 | vdb-entryx_refsource_OSVDB | |
| http://secunia.com/advisories/27252 | third-party-advisoryx_refsource_SECUNIAVendor Advisory | |
| http://securityreason.com/securityalert/3271 | third-party-advisoryx_refsource_SREASON | |
| http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=655203 | x_refsource_CONFIRM | |
| http://www.csnc.ch/static/advisory/csnc/nortel_UNIStim_IP_softphone_buffer-overflow_v1.0.txt | x_refsource_MISCExploit | |
| http://www.securityfocus.com/archive/1/482476/100/0/threaded | mailing-listx_refsource_BUGTRAQ | |
| http://www.securityfocus.com/bid/26118 | vdb-entryx_refsource_BIDExploit | |
| http://www.vupen.com/english/advisories/2007/3540 | vdb-entryx_refsource_VUPEN | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/37256 | vdb-entryx_refsource_XF |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Oct 23, 2007
Updated Aug 7, 2024
Reserved Oct 23, 2007
Link CVE-2007-5636
CISA Vulnrichment
Updated n/a