ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2025-67721

Aircompressor is a library with ports of the Snappy, LZO, LZ4, and Zstandard compression algorithms to Java.

Published Dec 12, 2025 · catalog updated Dec 15, 2025 · Aircompressor is a library

Last checked Nov 5, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-67721. EPSS is 0.53%. Act only if a listed version of Aircompressor is a library is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Aircompressor is a library).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.53%
Remediation
Version ranges on file
Affected products
vendor airlift aircompressor < 3.4

Aircompressor is a library with ports of the Snappy, LZO, LZ4, and Zstandard compression algorithms to Java. In versions 3.3 and below, incorrect handling of malformed data in Java-based decompressor implementations for Snappy and LZ4 allow remote attackers to read previous buffer contents via crafted compressed input. With certain crafted compressed inputs, elements from the output buffer can end up in the uncompressed output, potentially leaking sensitive data. This is relevant for applications that reuse the same output buffer to uncompress multiple inputs. This can be the case of a web ser

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor airlift aircompressor < 3.4< 3.4

How to fix CVE-2025-67721

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-67721. EPSS is 0.53%. Act only if a listed version of Aircompressor is a library is installed.

Which versions are affected?

Compare what you have installed with airlift aircompressor < 3.4 < 3.4. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.53%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 12, 2025 · EUVD

    Detected

    Aircompressor is a library with ports of the Snappy, LZO, LZ4, and Zstandard compression algorithms to Java. In versions 3.3 and below, incorrect handling of malformed data in Java-based decompressor implementations for Snappy and LZ4 allow remote attackers to read previous buffer contents via crafted compressed input. With certain crafted compressed inputs, elements from the output buffer can end

  2. Dec 15, 2025 · EUVD

    Updated

    Aircompressor is a library with ports of the Snappy, LZO, LZ4, and Zstandard compression algorithms to Java. In versions 3.3 and below, incorrect handling of malformed data in Java-based decompressor implementations for Snappy and LZ4 allow remote attackers to read previous buffer contents via crafted compressed input. With certain crafted compressed inputs, elements from the output buffer can end

Sources

  • CVE.orgVulnerability recordCVE-2025-67721

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-67721

    30-day exploitation probability 0.53%

    first.org
  • EUVDVulnerability recordEUVD-2025-203174

    Aircompressor is a library with ports of the Snappy, LZO, LZ4, and Zstandard compression algorithms to Java. In versions 3.3 and below, incorrect handling of malformed data in Java-based decompressor implementations for Snappy and LZ4 allow remote attackers to read previous buffe

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 5, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 5, 2026
  • CVE.orgOct 27, 2026
  • EUVDOct 27, 2026