CVE-2021-38677
CVE-2021-38677 is a medium-severity vulnerability in Qnap Qcalagent with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.
Key facts
- Severity: Medium (CVSS 3.x base score 5.3)
- CVSS v2: 4.3
- EPSS exploit prediction: 1% (49th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-79
- Affected product: Qnap Qcalagent
- Published:
- Last modified:
Description
A cross-site scripting (XSS) vulnerability has been reported to affect QNAP device running QcalAgent. If exploited, this vulnerability allows remote attackers to inject malicious code. We have already fixed this vulnerability in the following versions of QcalAgent: QcalAgent 1.1.7 and later
Frequently asked questions
- What is CVE-2021-38677?
- A cross-site scripting (XSS) vulnerability has been reported to affect QNAP device running QcalAgent. If exploited, this vulnerability allows remote attackers to inject malicious code. We have already fixed this vulnerability in the following versions of QcalAgent: QcalAgent 1.1.7 and later
- How severe is CVE-2021-38677?
- CVE-2021-38677 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
- Is CVE-2021-38677 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-38677?
- CVE-2021-38677 affects Qnap Qcalagent. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-38677?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-38677 published?
- CVE-2021-38677 was published on 2022-01-14 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:qnap:qcalagent:*:*:*:*:*:*:*:*
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