CVE-2024-20455A vulnerability in the process that classifies traffic that is going to the Unified Threat Defense (UTD) component of Cisco IOS XE…
- 8.6HighCVSS base score
- 0.66%Exploitation in 30 daysEPSS · top 48% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
A vulnerability in the process that classifies traffic that is going to the Unified Threat Defense (UTD) component of Cisco IOS XE Software in controller mode could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability exists because UTD improperly handles certain packets as those packets egress an SD-WAN IPsec tunnel. An attacker could exploit this vulnerability by sending crafted traffic through an SD-WAN IPsec tunnel that is configured on an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. Note: SD-WAN tunnels that are configured with Generic Routing Encapsulation (GRE) are not affected by this vulnerability.
Timeline
ID reserved
By cisco
- 11 months later
· 11 months later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| ciscoCNA (assigner) | 3.1 | High8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
| NVDNVD · Analyzed | 3.1 | High8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.66% · top 48% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.6.
Affected products
- affected 17.1.1
- affected 17.1.1a
- affected 17.1.1s
- affected 17.1.1t
- affected 17.1.3
- affected 17.2.1
- affected 17.2.1r
- affected 17.2.1a
- affected 17.2.1v
- affected 17.2.2
- affected 17.2.3
- affected 17.3.1
- affected 17.3.2
- affected 17.3.3
- affected 17.3.1a
- affected 17.3.1w
- affected 17.3.2a
- affected 17.3.1x
- affected 17.3.1z
- affected 17.3.4
- affected 17.3.5
- affected 17.3.4a
- affected 17.3.6
- affected 17.3.4b
- affected 17.3.4c
- affected 17.3.5a
- affected 17.3.5b
- affected 17.3.7
- affected 17.3.8
- affected 17.3.8a
- affected 17.4.1
- affected 17.4.2
- affected 17.4.1a
- affected 17.4.1b
- affected 17.4.2a
- affected 17.5.1
- affected 17.5.1a
- affected 17.6.1
- affected 17.6.2
- affected 17.6.1w
- and 47 more
Cisco · Cisco IOS XE Catalyst SD-WAN
- affected 17.5.1a
- affected 17.6.1a
- affected 17.6.2
- affected 17.6.4
- affected 17.7.1a
- affected 17.9.1a
- affected 17.9.2a
- affected 17.9.3a
- affected 17.9.4
- affected 17.8.1a
- affected 17.10.1a
- affected 17.11.1a
- affected 17.12.1a
- affected 17.13.1a
What to do
Exploitation: The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
References
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2024-18170 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2024-20455)Record last updated .