CVE-2017-6526: An issue was discovered in dnaTools dnaLIMS 4-2015s13

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2017-6526 is a critical-severity flaw (CVSS 9.8) affecting dnalims. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in dnaTools dnaLIMS 4-2015s13. dnaLIMS is vulnerable to unauthenticated command execution through an improperly protected administrative web shell (cgi-bin/dna/sysAdmin.cgi POST requests).

Why this priority

Critical severity
EPSS top 1%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	57.4% (top 1%)
CISA exploited list	No
Weakness	CWE-287
Published	2017-03-09
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: dnatools

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2017-03-09 19:59 UTCPublished CVE record published
2026-06-17 01:22 UTCUpdated Record last modified

dnatools dnalims DOWNGRADE

Affected: 4-2015s13

Fixed in: no fixed release known

Safe to downgrade to: a release before 4-2015s13

1. Check installed version

apt-cache policy dnalims || rpm -q dnalims || dnalims --version

2. No fixed release: DOWNGRADE to a release before 4-2015s13 (Debian / Ubuntu)

apt-cache madison dnalims sudo apt install dnalims=<VERSION_BEFORE_4-2015s13> sudo apt-mark hold dnalims

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list dnalims sudo dnf downgrade dnalims-<VERSION_BEFORE_4-2015s13> sudo dnf versionlock add dnalims

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: dnaLIMS DNA Sequencing - Directory Traversal / Session Hijacking / Cross-Site Scripting
Metasploit: dnaLIMS Admin Module Command Execution

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2017-6526?

dnalims: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2017-6526 being exploited?

CVE-2017-6526 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2017-6526 affect?

CVE-2017-6526 affects dnalims. Severity is critical (CVSS 9.8). An issue was discovered in dnaTools dnaLIMS 4-2015s13. dnaLIMS is vulnerable to unauthenticated command execution through an improperly protected administrative web shell (cgi-bin/dna/sysAdmin.cgi POST requests).

How urgent is CVE-2017-6526?

Priority 69/100. Critical severity; EPSS top 1%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2017-6529 HIGH 8.8 DOWNGRADE An issue was discovered in dnaTools dnaLIMS 4-2015s13
CVE-2017-6528 HIGH 8.1 DOWNGRADE An issue was discovered in dnaTools dnaLIMS 4-2015s13
CVE-2017-6527 HIGH 7.5 DOWNGRADE An issue was discovered in dnaTools dnaLIMS 4-2015s13

References

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