cve.bz

CVE-2021-27565

7.5 highEPSS 2.6%

High (7.5) in hcc-embedded nichestack. EPSS 2.6% chance of exploitation in the next 30 days.

The web server in InterNiche NicheStack through 4.0.1 allows remote attackers to cause a denial of service (infinite loop and networking outage) via an unexpected valid HTTP request such as OPTIONS. This occurs because the HTTP request handler enters a miscoded wbs_loop() debugger hook.

Severity

CVSS 3.1

7.5 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
2.6% chance of exploitation in the next 30 days; higher than 85% of CVEs (scores of 2026-11-01)
CWE
CWE-835
Published
Modified
Record from
the NVD, synced

Affected

References

Check your stackJSON