What’s Vulnerable › Vulnerabilities
CVE-2021-26843
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 1.4% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2021-02-07 · updated 2026-06-17
- Weakness: CWE-119
Description
An issue was discovered in sthttpd through 2.27.1. On systems where the strcpy function is implemented with memcpy, the de_dotdot function may cause a Denial-of-Service (daemon crash) due to overlapping memory ranges being passed to memcpy. This can triggered with an HTTP GET request for a crafted filename. NOTE: this is similar to CVE-2017-10671, but occurs in a different part of the de_dotdot function.
Affected products
- Sthttpd Project Sthttpd: through 2.27.1
References
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