CVE-2001-0636: Buffer overflows in Raytheon SilentRunner allow remote attackers to (1) cause a denial of service in the colle

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HIGH 7.5DOWNGRADE

CVE-2001-0636 is a high-severity flaw (CVSS 7.5) affecting silentrunner. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflows in Raytheon SilentRunner allow remote attackers to (1) cause a denial of service in the collector (cle.exe) component of SilentRunner 2.0 via traffic containing long passwords, or (2) execute arbitrary commands via long HTTP queries in the Knowledge Browser component in SilentRunner 2.0 and 2.0.1. NOTE: It is highly likely that this candidate will be split into multiple candidates.

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	2.6% (top 15%)
CISA exploited list	No
Published	2001-09-20
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: raytheon

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2001-09-20 04:00 UTCPublished CVE record published
2026-06-16 21:54 UTCUpdated Record last modified

raytheon silentrunner DOWNGRADE

Affected: 2.0 · 2.0.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0

1. Check installed version

apt-cache policy silentrunner || rpm -q silentrunner || silentrunner --version

2. No fixed release: DOWNGRADE to a release before 2.0 (Debian / Ubuntu)

apt-cache madison silentrunner sudo apt install silentrunner=<VERSION_BEFORE_2.0> sudo apt-mark hold silentrunner

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

dnf --showduplicates list silentrunner sudo dnf downgrade silentrunner-<VERSION_BEFORE_2.0> sudo dnf versionlock add silentrunner

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-2001-0636?

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

Is CVE-2001-0636 being exploited?

CVE-2001-0636 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-2001-0636 affect?

CVE-2001-0636 affects silentrunner. Severity is high (CVSS 7.5). Buffer overflows in Raytheon SilentRunner allow remote attackers to (1) cause a denial of service in the collector (cle.exe) component of SilentRunner 2.0 via traffic containing long passwords, or (2) execute arbitrary commands via long HTT

How urgent is CVE-2001-0636?

Priority 48/100. High severity

References

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