CVE-2018-7582: WebLog Expert Web Server Enterprise 9.4 allows Remote Denial Of Service (daemon crash) via a long HTTP Accept

This week

HIGH 7.5REMOTEDOWNGRADE

CVE-2018-7582 is a high-severity flaw (CVSS 7.5) affecting weblog expert. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

WebLog Expert Web Server Enterprise 9.4 allows Remote Denial Of Service (daemon crash) via a long HTTP Accept Header to TCP port 9991.

Why this priority

High severity
EPSS top 2%: 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	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	36.4% (top 2%)
CISA exploited list	No
Weakness	CWE-770
Published	2018-03-09
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: weblogexpert

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

Am I affected?

Timeline

2018-03-09 20:29 UTCPublished CVE record published
2026-06-17 02:03 UTCUpdated Record last modified

weblogexpert weblog expert DOWNGRADE

Affected: 9.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 9.4

1. Check installed version

apt-cache policy weblog-expert || rpm -q weblog-expert || weblog-expert --version

2. No fixed release: DOWNGRADE to a release before 9.4 (Debian / Ubuntu)

apt-cache madison weblog-expert sudo apt install weblog-expert=<VERSION_BEFORE_9.4> sudo apt-mark hold weblog-expert

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

dnf --showduplicates list weblog-expert sudo dnf downgrade weblog-expert-<VERSION_BEFORE_9.4> sudo dnf versionlock add weblog-expert

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: WebLog Expert Enterprise 9.4 - Denial of Service

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-2018-7582?

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

Is CVE-2018-7582 being exploited?

CVE-2018-7582 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-2018-7582 affect?

CVE-2018-7582 affects weblog expert. Severity is high (CVSS 7.5). WebLog Expert Web Server Enterprise 9.4 allows Remote Denial Of Service (daemon crash) via a long HTTP Accept Header to TCP port 9991.

How urgent is CVE-2018-7582?

Priority 61/100. High severity; EPSS top 2%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2018-7581 HIGH 7.8 DOWNGRADE \ProgramData\WebLog Expert\WebServer\WebServer.cfg in WebLog Expert Web Server Enterprise 9.4 has weak permiss

References

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