The product receives input from an upstream component, but it does not handle or incorrectly handles when an additional unexpected special element is provided.
Volume of CVEs assigned to CWE-167 and their average CVSS base score over time.
Top CVEs that have been assigned this CWE. A single CVE can have multiple CWE assignments, though many have just one.
5 CVEs · Highest risk first
| CVE | Published | CVSS | Risk | KEV | Exploit |
|---|---|---|---|---|---|
CVE-2023-4809HIGH In pf packet processing with a 'scrub fragment reassemble' rule, a packet containing multiple IPv6 fragment headers would be reassembled, and then immediately processed. That is, | Sep 6, 2023 | 7.5 | 25 | NO | NO |
CVE-2025-30656HIGH An Improper Handling of Additional Special Element vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on MX Series with MS-MPC, MS-MIC and SPC3, and S | Apr 9, 2025 | 7.5 | 22 | NO | NO |
CVE-2023-0643MEDIUM Improper Handling of Additional Special Element in GitHub repository squidex/squidex prior to 7.4.0. | Feb 2, 2023 | 6.1 | 22 | NO | NO |
CVE-2025-25006MEDIUM Improper handling of additional special element in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network. | Aug 12, 2025 | 5.3 | 20 | NO | NO |
CVE-2023-3580MEDIUM Improper Handling of Additional Special Element in GitHub repository squidex/squidex prior to 7.4.0. | Jul 10, 2023 | 4.3 | 17 | NO | NO |
Exploit activity across CVEs assigned to this CWE, including CVEs that carry other CWE assignments.
Social posts that mention CVE IDs assigned to this CWE. This is assigned-CVE activity, not mentions of the CWE label itself.
Media articles that mention CVE IDs assigned to this CWE. This is assigned-CVE coverage, not mentions of the CWE label itself.