CVE-2021-29221
mediumpriority · track · 28EPSS 0.006 · 48 %ileEUUSEPSS · scored 2026-10-28
A local privilege escalation vulnerability was discovered in Erlang/OTP prior to version 23.2.3. By adding files to an existing installation's directory, a local attacker could hijack accounts of other users running Erlang programs or possibly coerce a service running with "erlsrv.exe" to execute arbitrary code as Local System. This can occur only under specific conditions on Windows with unsafe filesystem permissions.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.2–7
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (7)
External citations — patches, advisories, analysis.
- https://deepsurface.com/deepsurface-security-advisory-local-privilege-escalation-in-erlang-on-windows-cve-2021-29221/cnnvd
- https://github.com/erlang/otp/releases/tag/OTP-23.2.3cnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2021-29221cnnvd
- https://deepsurface.com/deepsurface-security-advisory-local-privilege-escalation-in-erlang-on-windows-cve-2021-29221/enisa_euvd
- https://github.com/erlang/otp/releases/tag/OTP-23.2.3enisa_euvd
- https://deepsurface.com/deepsurface-security-advisory-local-privilege-escalation-in-erlang-on-windows-cve-2021-29221/ExploitThird Party Advisorynvd
- https://github.com/erlang/otp/releases/tag/OTP-23.2.3Third Party Advisorynvd
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