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01 Record

CVE-2021-38693

Path Traversal in thttpd

MediumPUBLISHEDCNA: qnap
CNA base score5.3 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

02 Description

Path Traversal in thttpd

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
0.95% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 61.1% of scored records. A rank, not a probability.
NVD base score
5.3 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2022-05-05 16:50Z4 YR AGO
Last updated
2024-09-16 18:08Z2 YR AGO
Reserved
2021-08-13
Assigning CNA
qnap
Record state
PUBLISHED
Severity
Medium (CVSS 5.3)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weaknesses
  • CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')Base
Data version
5.1
Document digest
d202312225f9288924dfad54a395d9d5c82f8e0d0006f55c4f51aa2fe3eb1094

05 Affected products

VendorProductVersionsPlatforms
QNAP Systems Inc.QuTScloud< c5.0.1.1949—
QNAP Systems Inc.QuTS hero< h5.0.0.1949 build 20220215, < h4.5.4.1951 build 20220218—
QNAP Systems Inc.QTS< 5.0.0.1986 build 20220324, < 4.5.4.1991 build 20220329—

06 References

07 Remediation

We have already fixed this vulnerability in the following versions of QuTScloud, QuTS hero, QTS, QVR Pro Appliance: QuTScloud c5.0.1.1949 and later QuTS hero h5.0.0.1949 build 20220215 and later QuTS hero h4.5.4.1951 build 20220218 and later QTS 5.0.0.1986 build 20220324 and later QTS 4.5.4.1991 build 20220329 and later