CVE-2020-37119
CVE-2020-37119 is a critical-severity vulnerability in Nsasoft Nsauditor with a CVSS 3.x base score of 9.8. 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-787.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v4: 8.4
- EPSS exploit prediction: 1% (45th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2020-31047
- Weakness: CWE-787
- Affected product: Nsasoft Nsauditor
- Published:
- Last modified:
Description
Nsauditor 3.0.28 and 3.2.1.0 contains a buffer overflow vulnerability in the DNS Lookup tool that allows attackers to execute arbitrary code by overwriting memory. Attackers can craft a malicious DNS query payload to trigger a three-byte overwrite, bypass ASLR, and execute shellcode through a carefully constructed exploit.
Frequently asked questions
- What is CVE-2020-37119?
- Nsauditor 3.0.28 and 3.2.1.0 contains a buffer overflow vulnerability in the DNS Lookup tool that allows attackers to execute arbitrary code by overwriting memory. Attackers can craft a malicious DNS query payload to trigger a three-byte overwrite, bypass ASLR, and execute shellcode through a carefully constructed exploit.
- How severe is CVE-2020-37119?
- CVE-2020-37119 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2020-37119 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-37119?
- CVE-2020-37119 primarily affects Nsasoft Nsauditor. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2020-37119?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2020-37119 have an EU (EUVD) identifier?
- Yes. CVE-2020-37119 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-31047.
- When was CVE-2020-37119 published?
- CVE-2020-37119 was published on 2026-02-05 and last updated on 2026-06-17.
References
- https://www.exploit-db.com/exploits/48350
- https://www.nsauditor.com/
- https://www.vulncheck.com/advisories/nsauditor-buffer-overflow-sehaslr-bypass-bytes-overwrite
Affected products (2)
- cpe:2.3:a:nsasoft:nsauditor:3.0.28:*:*:*:*:*:*:*
- cpe:2.3:a:nsasoft:nsauditor:3.2.1.0:*:*:*:*:*:*:*
More vulnerabilities in Nsasoft Nsauditor
- CVE-2018-25213 — High (CVSS 8.4): Nsauditor 3.0.28.0 contains a structured exception handling buffer overflow vulnerability that allows local attackers…
- CVE-2020-37130 — High (CVSS 7.5): Nsauditor 3.2.0.0 contains a denial of service vulnerability in the registration name input field that allows attackers…
- CVE-2021-47895 — High (CVSS 7.5): Nsauditor 3.2.2.0 contains a denial of service vulnerability that allows attackers to crash the application by…
- CVE-2021-47815 — High (CVSS 7.5): Nsauditor 3.2.3 contains a denial of service vulnerability in the registration code input field that allows attackers…
- CVE-2019-25597 — Medium (CVSS 6.2): NSauditor 3.1.2.0 contains a buffer overflow vulnerability in the SNMP Auditor Community field that allows local…
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