CVE-2026-64881: The audit file upload handler does not sanitize filenames, allowing shell metacharacters to flow into system c

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HIGH 8.8UPGRADE

CVE-2026-64881 is a high-severity flaw (CVSS 8.8) affecting security center. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The audit file upload handler does not sanitize filenames, allowing shell metacharacters to flow into system command execution. This input validation failure enables command injection when chained with a related vulnerability.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	2.2% (top 17%)
CISA exploited list	No
Weakness	CWE-78
Published	2026-07-21
Last modified	2026-10-24

Publisher (CNA): Tenable Network Security, Inc. · Vendor: tenable

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-21 21:16 UTCPublished CVE record published
2026-10-24 19:10 UTCUpdated Record last modified

tenable security center UPGRADE

Affected: >= 6.6.0 and <= 6.8.0

Fixed in: newer than 6.8.0

Safe to downgrade to: a release before 6.6.0

1. Check installed version

apt-cache policy security-center || rpm -q security-center || security-center --version

2. UPGRADE to newer than 6.8.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade security-center

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade security-center

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 6.6.0 (Debian / Ubuntu)

apt-cache madison security-center sudo apt install security-center=<VERSION_BEFORE_6.6.0> sudo apt-mark hold security-center

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list security-center sudo dnf downgrade security-center-<VERSION_BEFORE_6.6.0> sudo dnf versionlock add security-center

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.

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-2026-64881?

security center: upgrade to newer than 6.8.0. Exact commands for each OS are on this page.

Is CVE-2026-64881 being exploited?

CVE-2026-64881 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-2026-64881 affect?

CVE-2026-64881 affects security center. Severity is high (CVSS 8.8). The audit file upload handler does not sanitize filenames, allowing shell metacharacters to flow into system command execution. This input validation failure enables command injection when chained with a related vulnerability.

How urgent is CVE-2026-64881?

Priority 51/100. High severity

Related CVEs

CVE-2026-64879 CRITICAL 9.9 UPGRADE A filename supplied during file upload is not properly sanitized before being used in system command execution
CVE-2026-64878 CRITICAL 9.9 UPGRADE Unvalidated input in asset filter parameters allows shell metacharacters to escape command argument handling,
CVE-2026-64877 HIGH 8.4 UPGRADE An authenticated non-admin user can exploit a SQL injection flaw in the ticketing REST API to access sensitive
CVE-2026-64880 HIGH 7.1 UPGRADE Unsanitized user-supplied input in report filtering parameters is concatenated directly into SQL queries witho

References

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