Platform All capabilities Keep threats out Seawall: Network Protection Fairway: Connectivity & Traffic Priority Lookout: Threat Intelligence Know and harden your estate Deckhand: Endpoint Protection Quartermaster: Asset & Software Inventory Radar: Vulnerability Management Stay in control Safe Harbor: Backup & Recovery Helm: Identity & Access Gangway: Secure Remote Access Respond and prove it Logbook: Investigation & Incident Response Muster: Training, Drills & Awareness Chandler: Supplier & Third-Party Risk Bridge: Central Command & Evidence Hardware & more Network appliances Order routers Portal showcase How it works Plans Compare plans Essentials Custom Complete Who it's for Maritime & offshore Industry & energy No IT team You have an IT team Services NIS2 & maritime compliance Penetration testing Threat intelligence Vulnerability reporter Free tools IP address lookup Vulnerability lookup Malware hash lookup Free malware scan User agent lookup Regulatory clock Report Report a suspicious event
Contact us
Vulnerability lookup

CVE-2026-22184

high CVSS 7.8 EPSS 0.4%

zlib versions up to and including 1.3.1.2 include a global buffer overflow in the untgz utility located under contrib/untgz. The vulnerability is limited to the standalone demonstration utility and does not affect the core zlib compression library. The flaw occurs when a user executes the untgz command with an excessively long archive name supplied via the command line, leading to an out-of-bounds write in a fixed-size global buffer.

Versions it affects

Software versions checked with the free lookup that CVE-2026-22184 applies to, and the release that fixes it where the sources name one.

zlib 1.2.11

At a glance

Severity
High
CVSS base score
7.8 out of 10
Known exploited
Not in CISA's catalogue of exploited vulnerabilities
EPSS
0.4% probability of exploitation in the next 30 days, higher than 34% of scored vulnerabilities
Weakness
CWE-120
Published
2026-01-07
NVD CVE.org Advisory record

Is this running somewhere in your estate?

The Vulnerability Reporter inventories every machine and tells you when an advisory like this one applies to you.

Explore the service Check another version