How severe is CVE-2025-62843?

CVE-2025-62843 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-62843 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-62843?

CVE-2025-62843 primarily affects Qnap Qurouter. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-62843?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-62843 have an EU (EUVD) identifier?

Yes. CVE-2025-62843 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-208895.

When was CVE-2025-62843 published?

CVE-2025-62843 was published on 2026-03-20 and last updated on 2026-06-17.

CVE-2025-62843

CVE-2025-62843 is a medium-severity vulnerability in Qnap Qurouter with a CVSS 3.x base score of 6.8. 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-923.

Key facts

Severity: Medium (CVSS 3.x base score 6.8)
CVSS v4: 0.9
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-208895
Weakness: CWE-923
Affected product: Qnap Qurouter
Published: 2026-03-20
Last modified: 2026-06-17

Description

An improper restriction of communication channel to intended endpoints vulnerability has been reported to affect QHora. If an attacker gains physical access, they can then exploit the vulnerability to gain the privileges that were intended for the original endpoint. We have already fixed the vulnerability in the following version: QuRouter 2.6.3.009 and later

Frequently asked questions

What is CVE-2025-62843?: An improper restriction of communication channel to intended endpoints vulnerability has been reported to affect QHora. If an attacker gains physical access, they can then exploit the vulnerability to gain the privileges that were intended for the original endpoint. We have already fixed the vulnerability in the following version: QuRouter 2.6.3.009 and later
How severe is CVE-2025-62843?: CVE-2025-62843 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-62843 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-62843?: CVE-2025-62843 primarily affects Qnap Qurouter. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-62843?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-62843 have an EU (EUVD) identifier?: Yes. CVE-2025-62843 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-208895.
When was CVE-2025-62843 published?: CVE-2025-62843 was published on 2026-03-20 and last updated on 2026-06-17.

References

https://www.qnap.com/en/security-advisory/qsa-26-12

Affected products (4)

cpe:2.3:o:qnap:qurouter:2.6.0.239:build_20250625:*:*:*:*:*:*
cpe:2.3:o:qnap:qurouter:2.6.0.688:build_20250818:*:*:*:*:*:*
cpe:2.3:o:qnap:qurouter:2.6.1.028:build_20251001:*:*:*:*:*:*
cpe:2.3:o:qnap:qurouter:2.6.2.007:build_20251027:*:*:*:*:*:*

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