Cisco IP Phone 7800 Series and 8800 Series Session Initiation Protocol XML Denial of Service Vulnerability
Published May 3, 2019
7.5
HIGHCVSS 3.1
EPSS 1.97%
Description
A vulnerability in the call-handling functionality of Session Initiation Protocol (SIP) Software for Cisco IP Phone 7800 Series and 8800 Series could allow an unauthenticated, remote attacker to cause an affected phone to reload unexpectedly, resulting in a temporary denial of service (DoS) condition. The vulnerability is due to incomplete error handling when XML data within a SIP packet is parsed. An attacker could exploit this vulnerability by sending a SIP packet that contains a malicious XML payload to an affected phone. A successful exploit could allow the attacker to cause the affected phone to reload unexpectedly, resulting in a temporary DoS condition.
Affected products
-
- Version unspecifiedStatusaffectedConstraints<12.5(1)
- Version
-
- Version unspecifiedStatusaffectedConstraints<11.0(5)
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Cisco | Cisco IP Phone 7800 Series and 8800 Series | n/a |
| ||||||
| Cisco | Cisco Wireless IP Phone 8821 and 8821-EX | n/a |
|
Configuration 1
- 9.3\(4\)sr3
- 10.3\(1\)sr4b
- 11.0\(4\)sr2
- 12.1\(1\)sr1
Running on/with
- n/a
Configuration 2
- 9.3\(4\)sr3
- 10.3\(1\)sr4b
- 11.0\(4\)sr2
- 12.1\(1\)sr1
Running on/with
- n/a
Configuration 3
- 9.3\(4\)sr3
- 10.3\(1\)sr4b
- 11.0\(4\)sr2
- 12.1\(1\)sr1
Running on/with
- n/a
Configuration 4
- 9.3\(4\)sr3
- 10.3\(1\)sr4b
- 11.0\(4\)sr2
- 12.1\(1\)sr1
Running on/with
- n/a
Configuration 5
- 9.3\(4\)sr3
- 10.3\(1\)sr4b
- 11.0\(4\)sr2
- 12.1\(1\)sr1
Running on/with
- n/a
Configuration 6
- 9.3\(4\)sr3
- 10.3\(1\)sr4b
- 11.0\(4\)sr2
- 12.1\(1\)sr1
Running on/with
- n/a
Configuration 7
- 9.3\(4\)sr3
- 10.3\(1\)sr4b
- 11.0\(4\)sr2
- 12.1\(1\)sr1
Running on/with
- n/a
Configuration 8
- 9.3\(4\)sr3
- 10.3\(1\)sr4b
- 11.0\(4\)sr2
- 12.1\(1\)sr1
Running on/with
- n/a
Configuration 9
- 9.3\(4\)sr3
- 10.3\(1\)sr4b
- 11.0\(4\)sr2
- 12.1\(1\)sr1
Running on/with
- n/a
Configuration 10
- 9.3\(4\)sr3
- 10.3\(1\)sr4b
- 11.0\(4\)sr2
- 12.1\(1\)sr1
Running on/with
- n/a
Configuration 11
- 9.3\(4\)sr3
- 10.3\(1\)sr4b
- 11.0\(4\)sr2
- 12.1\(1\)sr1
Running on/with
- n/a
Configuration 12
- 9.3\(4\)sr3
- 10.3\(1\)sr4b
- 11.0\(4\)sr2
- 12.1\(1\)sr1
Running on/with
- n/a
Configuration 13
- 9.3\(4\)sr3
- 10.3\(1\)sr4b
- 11.0\(4\)sr2
- 12.1\(1\)sr1
Running on/with
- n/a
Configuration 14
- 9.3\(4\)sr3
- 10.3\(1\)sr4b
- 11.0\(4\)sr2
- 12.1\(1\)sr1
Running on/with
Configuration 15
- 9.3\(4\)sr3
- 10.3\(1\)sr4b
- 11.0\(4\)sr2
- 12.1\(1\)sr1
Running on/with
- n/a
Configuration 16
- 9.3\(4\)sr3
- 10.3\(1\)sr4b
- 11.0\(4\)sr2
- 12.1\(1\)sr1
Running on/with
- 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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:L/Au:N/C:N/I:N/A:C
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
PartialDecision
n/aAssessed Nov 19, 2024 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 1.97% (0.01967) | 79.68th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.97% (0.01967) | 77.72th | v5 (v2026.06.15) |
| Dec 12, 2025 | 0.98% (0.00977) | 76.13th | v4 (v2025.03.14) |
| Mar 29, 2025 | 2.10% (0.02095) | 73.39th | v4 (v2025.03.14) |
| Jul 20, 2024 | 0.16% (0.00159) | 52.88th | v3 (v2023.03.01) |
| Jun 26, 2024 | 0.16% (0.00159) | 52.68th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.16% (0.00159) | 50.67th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.05% (0.01055) | 52.13th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.05% (0.01055) | 48.43th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.50% (0.04499) | 74.08th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.86% (0.02857) | 63.60th | v5 (v2026.06.15) |
| Jan 6, 2022 | 2.86% (0.02857) | 63.25th | v1 |
| Sep 1, 2021 | 0.65% (0.00651) | 45.91th | v1 |
| Apr 14, 2021 | 0.65% (0.00651) | 0.00th | v1 |
References (1)
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-phone-sip-xml-dos vendor-advisoryx_refsource_CISCOVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-phone-sip-xml-dos | vendor-advisoryx_refsource_CISCOVendor Advisory |
Change history (0)
No recorded changes yet.