Cisco IOS XE Software NAT Session Initiation Protocol Application Layer Gateway Denial of Service Vulnerability
Published Oct 5, 2018
5.9
MEDIUMCVSS 3.0
EPSS 13.70%
Description
A vulnerability in the Network Address Translation (NAT) Session Initiation Protocol (SIP) Application Layer Gateway (ALG) of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload. The vulnerability is due to improper processing of SIP packets in transit while NAT is performed on an affected device. An unauthenticated, remote attacker could exploit this vulnerability by sending crafted SIP packets via UDP port 5060 through an affected device that is performing NAT for SIP packets. A successful exploit could allow an attacker to cause the device to reload, resulting in a denial of service (DoS) condition.
Affected products
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 XE Software | 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.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:M/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
NoTechnical Impact
PartialDecision
n/aAssessed Nov 25, 2024 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (30 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 13.70% (0.13698) | 96.38th | v5 (v2026.06.15) |
| Sep 22, 2026 | 13.70% (0.13698) | 96.32th | v5 (v2026.06.15) |
| Sep 21, 2026 | 10.21% (0.10215) | 95.52th | v5 (v2026.06.15) |
| Sep 6, 2026 | 13.70% (0.13698) | 96.24th | v5 (v2026.06.15) |
| Sep 5, 2026 | 10.21% (0.10215) | 95.43th | v5 (v2026.06.15) |
| Aug 30, 2026 | 13.70% (0.13698) | 96.21th | v5 (v2026.06.15) |
| Aug 28, 2026 | 10.21% (0.10215) | 95.40th | v5 (v2026.06.15) |
| Aug 24, 2026 | 13.70% (0.13698) | 96.20th | v5 (v2026.06.15) |
| Aug 23, 2026 | 10.21% (0.10215) | 95.38th | v5 (v2026.06.15) |
| Jun 15, 2026 | 13.70% (0.13698) | 96.00th | v5 (v2026.06.15) |
| Oct 27, 2025 | 3.62% (0.03624) | 87.32th | v4 (v2025.03.14) |
| Mar 17, 2025 | 5.12% (0.05123) | 89.10th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.30% (0.00304) | 70.56th | v3 (v2023.03.01) |
| Jul 11, 2024 | 0.30% (0.00304) | 69.96th | v3 (v2023.03.01) |
| May 15, 2024 | 0.32% (0.00319) | 70.34th | v3 (v2023.03.01) |
| Mar 28, 2024 | 0.42% (0.00416) | 73.65th | v3 (v2023.03.01) |
| Feb 17, 2024 | 0.50% (0.00503) | 75.78th | v3 (v2023.03.01) |
| Jan 14, 2024 | 0.54% (0.00537) | 74.71th | v3 (v2023.03.01) |
| Sep 29, 2023 | 0.54% (0.00542) | 74.60th | v3 (v2023.03.01) |
| Jul 8, 2023 | 0.55% (0.00553) | 74.46th | v3 (v2023.03.01) |
| May 21, 2023 | 0.68% (0.00683) | 77.09th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.88% (0.00884) | 80.05th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.21% (0.01213) | 66.61th | v2 (v2022.01.01) |
| Feb 17, 2023 | 1.21% (0.01213) | 66.22th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.21% (0.01213) | 64.21th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.21% (0.01213) | 40.54th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.62% (0.01623) | 33.90th | v1 |
| Jan 6, 2022 | 1.62% (0.01623) | 33.20th | v1 |
| Sep 1, 2021 | 1.62% (0.01623) | 73.32th | v1 |
| Apr 14, 2021 | 1.62% (0.01623) | 0.00th | v1 |
References (4)
- http://www.securityfocus.com/bid/105419 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041734 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041737 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180926-sip-alg vendor-advisoryx_refsource_CISCOVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/105419 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1041734 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1041737 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180926-sip-alg | vendor-advisoryx_refsource_CISCOVendor Advisory |
Change history (0)
No recorded changes yet.