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CVE-2026-22321: Stack-based Buffer Overflow

🗓️ 18 Mar 2026 00:00:00Reported by Rapid7Type 
rapid7
 rapid7
🔗 www.rapid7.com

Unauthenticated DoS in scanner Telnet/SSH CLI login via oversized username overflow.

Related
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-22321
18 Mar 202607:34
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circl
Circl
CVE-2026-22321
18 Mar 202607:16
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cnnvd
CNNVD
Phoenix Contact多款产品 安全漏洞
18 Mar 202600:00
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cve
CVE
CVE-2026-22321
18 Mar 202607:34
–cve
cvelist
Cvelist
CVE-2026-22321 Stack-Based Buffer Overflow in CLI Login Username Handling over CLI
18 Mar 202607:34
–cvelist
euvd
EUVD
EUVD-2026-12790
18 Mar 202609:30
–euvd
nvd
NVD
CVE-2026-22321
18 Mar 202608:16
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ptsecurity
Positive Technologies
PT-2026-26037
18 Mar 202600:00
–ptsecurity
redhatcve
RedhatCVE
CVE-2026-22321
26 Mar 202615:06
–redhatcve
vulnrichment
Vulnrichment
CVE-2026-22321 Stack-Based Buffer Overflow in CLI Login Username Handling over CLI
18 Mar 202607:34
–vulnrichment

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18 Mar 2026 00:00Current
6.1Medium risk
Vulners AI Score6.1
CVSS 3.15.3
EPSS0.00366
SSVC
0