Is CVE-2019-11072 actively exploited?

No active exploitation of CVE-2019-11072 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2019-11072 be exploited remotely?

Yes. CVE-2019-11072 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2019-11072?

CVE-2019-11072 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2019-11072

CWE-190Published: April 10, 2019· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

lighttpd before 1.4.54 has a signed integer overflow, which might allow remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a malicious HTTP GET request, as demonstrated by mishandling of /%2F? in burl_normalize_2F_to_slash_fix in burl.c. NOTE: The developer states "The feature which can be abused to cause the crash is a new feature in lighttpd 1.4.50, and is not enabled by default. It must be explicitly configured in the config file (e.g. lighttpd.conf). Certain input will trigger an abort() in lighttpd when that feature is enabled. lighttpd detects the underflow or realloc() will fail (in both 32-bit and 64-bit executables), also detected in lighttpd. Either triggers an explicit abort() by lighttpd. This is not exploitable beyond triggering the explicit abort() with subsequent application exit.

NVD Source

Technical Analysis

CVE-2019-11072 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.