HIGH
Cisco IOS and IOS XE Software ISDN Interface Denial of Service Vulnerability
Published Mar 28, 2019
7.5
HIGHCVSS 3.1
EPSS 2.52%
Description
A vulnerability in the ISDN functions of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the device to reload. The vulnerability is due to incorrect processing of specific values in the Q.931 information elements. An attacker could exploit this vulnerability by calling the affected device with specific Q.931 information elements being present. An exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition on an affected device.
Affected products
-
- Version 16.2.1StatusaffectedConstraints-
- Version 16.2.2StatusaffectedConstraints-
- Version 16.3.1StatusaffectedConstraints-
- Version 16.3.1aStatusaffectedConstraints-
- Version 16.3.2StatusaffectedConstraints-
- Version 16.3.3StatusaffectedConstraints-
- Version 16.3.4StatusaffectedConstraints-
- Version 16.3.5StatusaffectedConstraints-
- Version 16.3.6StatusaffectedConstraints-
- Version 16.3.7StatusaffectedConstraints-
- Version 16.4.1StatusaffectedConstraints-
- Version 16.4.2StatusaffectedConstraints-
- Version 16.4.3StatusaffectedConstraints-
- Version 16.5.1StatusaffectedConstraints-
- Version 16.5.1bStatusaffectedConstraints-
- Version 16.5.2StatusaffectedConstraints-
- Version 16.5.3StatusaffectedConstraints-
- Version 16.6.1StatusaffectedConstraints-
- Version 16.6.2StatusaffectedConstraints-
- Version 16.6.3StatusaffectedConstraints-
- Version 16.6.4StatusaffectedConstraints-
- Version 16.6.4sStatusaffectedConstraints-
- Version 16.7.1StatusaffectedConstraints-
- Version 16.7.1aStatusaffectedConstraints-
- Version 16.7.1bStatusaffectedConstraints-
- Version 16.7.2StatusaffectedConstraints-
- Version 16.7.3StatusaffectedConstraints-
- Version 16.8.1StatusaffectedConstraints-
- Version 16.8.1dStatusaffectedConstraints-
- Version 16.8.1sStatusaffectedConstraints-
- Version 3.10.0SStatusaffectedConstraints-
- Version 3.10.10SStatusaffectedConstraints-
- Version 3.10.1SStatusaffectedConstraints-
- Version 3.10.2SStatusaffectedConstraints-
- Version 3.10.2aSStatusaffectedConstraints-
- Version 3.10.2tSStatusaffectedConstraints-
- Version 3.10.3SStatusaffectedConstraints-
- Version 3.10.4SStatusaffectedConstraints-
- Version 3.10.5SStatusaffectedConstraints-
- Version 3.10.6SStatusaffectedConstraints-
- Version 3.10.7SStatusaffectedConstraints-
- Version 3.10.8SStatusaffectedConstraints-
- Version 3.10.8aSStatusaffectedConstraints-
- Version 3.10.9SStatusaffectedConstraints-
- Version 3.11.0SStatusaffectedConstraints-
- Version 3.11.1SStatusaffectedConstraints-
- Version 3.11.2SStatusaffectedConstraints-
- Version 3.11.3SStatusaffectedConstraints-
- Version 3.11.4SStatusaffectedConstraints-
- Version 3.12.0SStatusaffectedConstraints-
- Version 3.12.0aSStatusaffectedConstraints-
- Version 3.12.1SStatusaffectedConstraints-
- Version 3.12.2SStatusaffectedConstraints-
- Version 3.12.3SStatusaffectedConstraints-
- Version 3.12.4SStatusaffectedConstraints-
- Version 3.13.0SStatusaffectedConstraints-
- Version 3.13.10SStatusaffectedConstraints-
- Version 3.13.1SStatusaffectedConstraints-
- Version 3.13.2SStatusaffectedConstraints-
- Version 3.13.2aSStatusaffectedConstraints-
- Version 3.13.3SStatusaffectedConstraints-
- Version 3.13.4SStatusaffectedConstraints-
- Version 3.13.5SStatusaffectedConstraints-
- Version 3.13.5aSStatusaffectedConstraints-
- Version 3.13.6SStatusaffectedConstraints-
- Version 3.13.6aSStatusaffectedConstraints-
- Version 3.13.6bSStatusaffectedConstraints-
- Version 3.13.7SStatusaffectedConstraints-
- Version 3.13.7aSStatusaffectedConstraints-
- Version 3.13.8SStatusaffectedConstraints-
- Version 3.13.9SStatusaffectedConstraints-
- Version 3.14.0SStatusaffectedConstraints-
- Version 3.14.1SStatusaffectedConstraints-
- Version 3.14.2SStatusaffectedConstraints-
- Version 3.14.3SStatusaffectedConstraints-
- Version 3.14.4SStatusaffectedConstraints-
- Version 3.15.0SStatusaffectedConstraints-
- Version 3.15.1SStatusaffectedConstraints-
- Version 3.15.1cSStatusaffectedConstraints-
- Version 3.15.2SStatusaffectedConstraints-
- Version 3.15.3SStatusaffectedConstraints-
- Version 3.15.4SStatusaffectedConstraints-
- Version 3.16.0SStatusaffectedConstraints-
- Version 3.16.0bSStatusaffectedConstraints-
- Version 3.16.0cSStatusaffectedConstraints-
- Version 3.16.1SStatusaffectedConstraints-
- Version 3.16.1aSStatusaffectedConstraints-
- Version 3.16.2SStatusaffectedConstraints-
- Version 3.16.2bSStatusaffectedConstraints-
- Version 3.16.3SStatusaffectedConstraints-
- Version 3.16.4aSStatusaffectedConstraints-
- Version 3.16.4bSStatusaffectedConstraints-
- Version 3.16.4cSStatusaffectedConstraints-
- Version 3.16.4dSStatusaffectedConstraints-
- Version 3.16.4eSStatusaffectedConstraints-
- Version 3.16.4gSStatusaffectedConstraints-
- Version 3.16.5SStatusaffectedConstraints-
- Version 3.16.5aSStatusaffectedConstraints-
- Version 3.16.5bSStatusaffectedConstraints-
- Version 3.16.6SStatusaffectedConstraints-
- Version 3.16.6bSStatusaffectedConstraints-
- Version 3.16.7SStatusaffectedConstraints-
- Version 3.16.7aSStatusaffectedConstraints-
- Version 3.16.7bSStatusaffectedConstraints-
- Version 3.16.8SStatusaffectedConstraints-
- Version 3.17.0SStatusaffectedConstraints-
- Version 3.17.1SStatusaffectedConstraints-
- Version 3.17.1aSStatusaffectedConstraints-
- Version 3.17.2SStatusaffectedConstraints-
- Version 3.17.3SStatusaffectedConstraints-
- Version 3.17.4SStatusaffectedConstraints-
- Version 3.18.0SPStatusaffectedConstraints-
- Version 3.18.0aSStatusaffectedConstraints-
- Version 3.18.1SStatusaffectedConstraints-
- Version 3.18.1SPStatusaffectedConstraints-
- Version 3.18.1aSPStatusaffectedConstraints-
- Version 3.18.2aSPStatusaffectedConstraints-
- Version 3.18.3SPStatusaffectedConstraints-
- Version 3.18.3aSPStatusaffectedConstraints-
- Version 3.18.3bSPStatusaffectedConstraints-
- Version 3.18.4SPStatusaffectedConstraints-
- Version 3.18.5SPStatusaffectedConstraints-
- Version 3.8.0SStatusaffectedConstraints-
- Version 3.8.1SStatusaffectedConstraints-
- Version 3.8.2SStatusaffectedConstraints-
- Version 3.9.0SStatusaffectedConstraints-
- Version 3.9.0aSStatusaffectedConstraints-
- Version 3.9.1SStatusaffectedConstraints-
- Version 3.9.1aSStatusaffectedConstraints-
- Version 3.9.2SStatusaffectedConstraints-
- 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 IOS and IOS XE Software | n/a |
|
OR
- 15.0\(1\)m
- 15.0\(1\)m1
- 15.0\(1\)m2
- 15.0\(1\)m3
- 15.0\(1\)m4
- 15.0\(1\)m5
- 15.0\(1\)m6
- 15.0\(1\)m6a
- 15.0\(1\)m7
- 15.0\(1\)m8
- 15.0\(1\)m9
- 15.0\(1\)m10
- 15.0\(1\)xa
- 15.0\(1\)xa1
- 15.0\(1\)xa2
- 15.0\(1\)xa3
- 15.0\(1\)xa4
- 15.0\(1\)xa5
- 15.1\(1\)t
- 15.1\(1\)t1
- 15.1\(1\)t2
- 15.1\(1\)t3
- 15.1\(1\)t4
- 15.1\(1\)t5
- 15.1\(1\)xb
- 15.1\(1\)xb1
- 15.1\(1\)xb2
- 15.1\(1\)xb3
- 15.1\(2\)gc
- 15.1\(2\)gc1
- 15.1\(2\)gc2
- 15.1\(2\)t
- 15.1\(2\)t0a
- 15.1\(2\)t1
- 15.1\(2\)t2
- 15.1\(2\)t2a
- 15.1\(2\)t3
- 15.1\(2\)t4
- 15.1\(2\)t5
- 15.1\(3\)t
- 15.1\(3\)t1
- 15.1\(3\)t2
- 15.1\(3\)t3
- 15.1\(3\)t4
- 15.1\(4\)gc
- 15.1\(4\)gc1
- 15.1\(4\)gc2
- 15.1\(4\)m
- 15.1\(4\)m0a
- 15.1\(4\)m0b
- 15.1\(4\)m1
- 15.1\(4\)m2
- 15.1\(4\)m3
- 15.1\(4\)m3a
- 15.1\(4\)m4
- 15.1\(4\)m5
- 15.1\(4\)m6
- 15.1\(4\)m7
- 15.1\(4\)m8
- 15.1\(4\)m9
- 15.1\(4\)m10
- 15.1\(4\)m12a
- 15.1\(4\)m12c
- 15.1\(4\)xb4
- 15.1\(4\)xb5
- 15.1\(4\)xb5a
- 15.1\(4\)xb6
- 15.1\(4\)xb7
- 15.1\(4\)xb8
- 15.1\(4\)xb8a
- 15.2\(1\)gc
- 15.2\(1\)gc1
- 15.2\(1\)gc2
- 15.2\(2\)gc
- 15.2\(3\)gc
- 15.2\(3\)gc1
- 15.2\(4\)gc
- 15.2\(4\)gc1
- 15.2\(4\)gc2
- 15.2\(4\)gc3
- 15.2\(4\)m
- 15.2\(4\)m1
- 15.2\(4\)m2
- 15.2\(4\)m3
- 15.2\(4\)m4
- 15.2\(4\)m5
- 15.2\(4\)m6
- 15.2\(4\)m6a
- 15.2\(4\)m6b
- 15.2\(4\)m7
- 15.2\(4\)m8
- 15.2\(4\)m9
- 15.2\(4\)m10
- 15.2\(4\)m11
- 15.3\(1\)t
- 15.3\(1\)t1
- 15.3\(1\)t2
- 15.3\(1\)t3
- 15.3\(1\)t4
- 15.3\(2\)t
- 15.3\(2\)t1
- 15.3\(2\)t2
- 15.3\(2\)t3
- 15.3\(2\)t4
- 15.3\(3\)m
- 15.3\(3\)m1
- 15.3\(3\)m2
- 15.3\(3\)m3
- 15.3\(3\)m4
- 15.3\(3\)m5
- 15.3\(3\)m6
- 15.3\(3\)m7
- 15.3\(3\)m8
- 15.3\(3\)m8a
- 15.3\(3\)m9
- 15.3\(3\)m10
- 15.3\(3\)xb12
- 15.4\(1\)cg
- 15.4\(1\)cg1
- 15.4\(1\)t
- 15.4\(1\)t1
- 15.4\(1\)t2
- 15.4\(1\)t3
- 15.4\(1\)t4
- 15.4\(2\)cg
- 15.4\(2\)s3
- 15.4\(2\)t
- 15.4\(2\)t1
- 15.4\(2\)t2
- 15.4\(2\)t3
- 15.4\(2\)t4
- 15.4\(3\)m
- 15.4\(3\)m1
- 15.4\(3\)m2
- 15.4\(3\)m3
- 15.4\(3\)m4
- 15.4\(3\)m5
- 15.4\(3\)m6
- 15.4\(3\)m6a
- 15.4\(3\)m7
- 15.4\(3\)m7a
- 15.4\(3\)m8
- 15.4\(3\)m9
- 15.4\(3\)m10
- 15.5\(1\)t
- 15.5\(1\)t1
- 15.5\(1\)t2
- 15.5\(1\)t3
- 15.5\(1\)t4
- 15.5\(2\)t
- 15.5\(2\)t1
- 15.5\(2\)t2
- 15.5\(2\)t3
- 15.5\(2\)t4
- 15.5\(2\)xb
- 15.5\(3\)m
- 15.5\(3\)m1
- 15.5\(3\)m2
- 15.5\(3\)m2a
- 15.5\(3\)m3
- 15.5\(3\)m4
- 15.5\(3\)m4a
- 15.5\(3\)m4b
- 15.5\(3\)m4c
- 15.5\(3\)m5
- 15.5\(3\)m5a
- 15.6\(1\)t
- 15.6\(1\)t0a
- 15.6\(1\)t1
- 15.6\(1\)t2
- 15.6\(1\)t3
- 15.6\(2\)t
- 15.6\(2\)t1
- 15.6\(2\)t2
- 15.6\(2\)t3
- 15.6\(3\)m
- 15.6\(3\)m0a
- 15.6\(3\)m1
- 15.6\(3\)m1a
- 15.6\(3\)m1b
- 15.6\(3\)m2
- 15.6\(3\)m2a
- 15.6\(3\)m3
- 15.6\(3\)m3a
- 15.6\(3\)m4
- 15.6\(3\)m5
- 15.7\(3\)m
- 15.7\(3\)m0a
- 15.7\(3\)m1
- 15.7\(3\)m2
- 15.7\(3\)m3
- 15.8\(3\)m
- 15.8\(3\)m0a
- 3.8.0s
- 3.8.1s
- 3.8.2s
- 3.9.0as
- 3.9.0s
- 3.9.1as
- 3.9.1s
- 3.9.2s
- 3.10.0s
- 3.10.1s
- 3.10.2as
- 3.10.2s
- 3.10.2ts
- 3.10.3s
- 3.10.4s
- 3.10.5s
- 3.10.6s
- 3.10.7s
- 3.10.8as
- 3.10.8s
- 3.10.9s
- 3.10.10s
- 3.11.0s
- 3.11.1s
- 3.11.2s
- 3.11.3s
- 3.11.4s
- 3.12.0as
- 3.12.0s
- 3.12.1s
- 3.12.2s
- 3.12.3s
- 3.12.4s
- 3.13.0s
- 3.13.1s
- 3.13.2as
- 3.13.2s
- 3.13.3s
- 3.13.4s
- 3.13.5as
- 3.13.5s
- 3.13.6as
- 3.13.6bs
- 3.13.6s
- 3.13.7as
- 3.13.7s
- 3.13.8s
- 3.13.9s
- 3.13.10s
- 3.14.0s
- 3.14.1s
- 3.14.2s
- 3.14.3s
- 3.14.4s
- 3.15.0s
- 3.15.1cs
- 3.15.1s
- 3.15.2s
- 3.15.3s
- 3.15.4s
- 3.16.0bs
- 3.16.0cs
- 3.16.0s
- 3.16.1as
- 3.16.1s
- 3.16.2bs
- 3.16.2s
- 3.16.3s
- 3.16.4as
- 3.16.4bs
- 3.16.4cs
- 3.16.4ds
- 3.16.4es
- 3.16.4gs
- 3.16.5as
- 3.16.5bs
- 3.16.5s
- 3.16.6bs
- 3.16.6s
- 3.16.7as
- 3.16.7bs
- 3.16.7s
- 3.16.8s
- 3.17.0s
- 3.17.1as
- 3.17.1s
- 3.17.3s
- 3.17.4s
- 3.18.0as
- 3.18.0sp
- 3.18.1asp
- 3.18.1s
- 3.18.1sp
- 3.18.2asp
- 3.18.3asp
- 3.18.3bsp
- 3.18.3sp
- 3.18.4sp
- 3.18.5sp
- 16.2.1
- 16.2.2
- 16.3.1
- 16.3.1a
- 16.3.2
- 16.3.3
- 16.3.4
- 16.3.5
- 16.3.6
- 16.3.7
- 16.4.1
- 16.4.2
- 16.4.3
- 16.5.1
- 16.5.1b
- 16.5.2
- 16.5.3
- 16.6.1
- 16.6.2
- 16.6.3
- 16.6.4
- 16.6.4s
- 16.7.1
- 16.7.1a
- 16.7.1b
- 16.7.2
- 16.7.3
- 16.8.1
- 16.8.1d
- 16.8.1s
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.
7.5 HIGH NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
8.6 HIGH CVE.org
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Changed
Confidentiality Impact None
Integrity Impact None
Availability Impact High
7.8 HIGH NVD
AV:N/AC:L/Au:N/C:N/I:N/A:C
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
2.52% 0.02516
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
EPSS probability 0.02516
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 2.52% (0.02516) | 84.28th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.52% (0.02516) | 82.70th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.16% (0.00157) | 52.46th | v3 (v2023.03.01) |
| Jun 22, 2024 | 0.16% (0.00157) | 52.24th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.16% (0.00157) | 50.24th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.05% (0.01055) | 52.13th | v2 (v2022.01.01) |
| Sep 17, 2022 | 1.05% (0.01055) | 50.47th | 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 | 4.24% (0.04237) | 74.61th | v1 |
| Jan 6, 2022 | 4.24% (0.04237) | 74.40th | v1 |
| Sep 1, 2021 | 0.98% (0.00976) | 61.78th | v1 |
| Apr 14, 2021 | 0.98% (0.00976) | 0.00th | v1 |
Weaknesses (1)
References (2)
- http://www.securityfocus.com/bid/107589 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190327-isdn vendor-advisoryx_refsource_CISCOPatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/107589 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190327-isdn | vendor-advisoryx_refsource_CISCOPatchVendor Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner cisco
Published Mar 28, 2019
Updated Sep 17, 2024
Reserved Dec 6, 2018
Link CVE-2019-1752
CISA Vulnrichment
Updated n/a