CVE-2016-20013
CVSS v3
7.5
HIGH
EPSS Score
2.2 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
sha256crypt and sha512crypt through 0.6 allow attackers to cause a denial of service (CPU consumption) because the algorithm's runtime is proportional to the square of the length of the password.
Technical details
- Published
- 2022-02-19
Frequently asked questions
What is CVE-2016-20013?
sha256crypt and sha512crypt through 0.6 allow attackers to cause a denial of service (CPU consumption) because the algorithm's runtime is proportional to the square of the length of the password.
Is CVE-2016-20013 actively exploited?
Active exploitation of CVE-2016-20013 has not been confirmed. Its EPSS score was 2.2% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2016-20013?
CVE-2016-20013 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2016-20013 affecting your environment?
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