# CVE-2026-57587: Tenable Nessus SQL injection via reverse DNS records

Source: https://junglewise.ai/threats/cve-2026-57587-tenable-nessus-sql-injection-via-reverse-dns-records  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-25. Updated: 2026-06-25  
License: CC BY 4.0 with a link back

CVE-2026-57587 · Severity: medium · CVSS 5.3 · Published 2026-06-25

Nessus is a widely used vulnerability scanner that helps organizations identify security weaknesses in their networks. A flaw has been identified where an attacker who controls the naming records (reverse DNS) of a scanned computer can inject malicious code into the Nessus database. This could allow the attacker to steal sensitive information from previous scan results, potentially exposing the security posture of other systems on the network.

Technologies: [Tenable Nessus](https://junglewise.ai/threats/technologies/nessus). Vendors: [Tenable](https://junglewise.ai/threats/vendors/tenable).

## Quick answers

**Is CVE-2026-57587 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-57587 being exploited in the wild.

**How severe is CVE-2026-57587?** Medium severity, with a CVSS score of 5.3, published 25 June 2026.

**Which products and versions are affected?** Tenable Nessus < 10.12.1.

**Is there a fix for CVE-2026-57587?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-57587 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-57587?** Check whether you run Tenable Nessus at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A SQL injection vulnerability (CWE-89) exists in Tenable Nessus due to improper neutralization of special elements in reverse DNS records during the scanning process. An unauthenticated remote attacker can exploit this by controlling the PTR records for a host being scanned by a Nessus instance. When Nessus performs a scan and resolves the hostname, the malicious record is processed and injected into the underlying scan results database. Successful exploitation could enable the attacker to exfiltrate sensitive scan-result data. The vulnerability is addressed in Nessus version 10.12.1.

## Affected products

- Tenable Nessus < 10.12.1

## Timeline

- 2026-06-25: disclosed
- 2026-06-25: advisory

## References

- [https://www.tenable.com/security/tns-2026-17](https://www.tenable.com/security/tns-2026-17)

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