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Fencer Intel
medium 5.9

CVE-2021-36158 json

In the xrdp package (in branches through 3.14) for Alpine Linux, RDP sessions are vulnerable to man-in-the-middle attacks because pre-gener…

published 5y ago modified 4mo ago also EUVD-2021-22782

cvss
5.9
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 28%
public exploits
0
none known

Summary

In the xrdp package (in branches through 3.14) for Alpine Linux, RDP sessions are vulnerable to man-in-the-middle attacks because pre-generated RSA certificates and private keys are used.

Patch / fix

  • xrdp Alpine 3.11 0.9.11-r1
  • xrdp Alpine 3.24, Alpine 3.23, Alpine 3.22 +10 more 0.9.15-r1

alpine advisories ALPINE-CVE-2021-36158

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Is CVE-2021-36158 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Exploit prediction

0.35% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:P/I:N/A:N

Classification

Weakness
  • CWE-312 Cleartext Storage of Sensitive Information

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.