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High 7.5Published Feb 10, 2026
CVE-2026-21218Improper handling of missing special element in .NET allows an unauthorized attacker to perform spoofing over a network.
Updated under an hour ago ()
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It affects microsoft .net. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Improper handling of missing special element in .NET allows an unauthorized attacker to perform spoofing over a network.
- CVSS
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- Weakness (CWE)
- CWE-166
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
microsoft .net microsoft:.net | from 8.0.0 before 8.0.24; from 9.0.0 before 9.0.13; from 10.0.0 before 10.0.3 | NVD |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21218vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.