CVE-2025-61430
MEDIUMDescription
Improper handling of DNS over TCP in Simple DNS Plus v9 allows a remote attacker with querying access to the DNS server to cause the server to return request payloads from other clients. This happens when the TCP length prefix is malformed (len differs from actual packet len), and due to a concurrency/buffering issue, even when the lengths match. A length prefix that is smaller than the actual packet size increases information leakage. In summary, this vulnerability allows an attacker to see DNS queries of other clients.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Exploit Intelligence
Low risk: more likely to be exploited than 15% of all known CVEs.
References
Related Vulnerabilities
Other CWE-350 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2021-22884 | High | 7.5 | 32% | - | Fix |
| CVE-2018-7160 | High | 8.8 | 9.9% | - | Fix |
| CVE-2017-0902 | High | 8.1 | 4.8% | - | Fix |
| CVE-2026-1490 | Critical | 9.8 | 1.2% | - | - |
| CVE-2021-34561 | High | 7.5 | 0.9% | - | - |
| CVE-2020-11091 | Medium | 5.8 | 0.9% | - | Fix |
Common questions
How do I fix CVE-2025-61430?
No published fix for CVE-2025-61430 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2025-61430 being actively exploited?
Not that we know of. CVE-2025-61430 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.24% is the estimated probability that it will be exploited in the next 30 days. That is higher than 15% of all scored CVEs.
How severe is CVE-2025-61430?
CVE-2025-61430 has a CVSS v3 base score of 6.5, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-27.