CVE-2006-0777: Unspecified vulnerability in guestex.pl in Teca Scripts Guestex 1.0 allows remote attackers to execute arbitra

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HIGH 7.5DOWNGRADE

CVE-2006-0777 is a high-severity flaw (CVSS 7.5) affecting guestex. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Unspecified vulnerability in guestex.pl in Teca Scripts Guestex 1.0 allows remote attackers to execute arbitrary shell commands via the email parameter, possibly involving shell metacharacters.

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	2.4% (top 16%)
CISA exploited list	No
Published	2006-02-19
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: teca scripts

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

Am I affected?

Timeline

2006-02-19 00:02 UTCPublished CVE record published
2026-06-16 22:21 UTCUpdated Record last modified

teca scripts guestex DOWNGRADE

Affected: 1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison guestex sudo apt install guestex=<VERSION_BEFORE_1.0> sudo apt-mark hold guestex

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

dnf --showduplicates list guestex sudo dnf downgrade guestex-<VERSION_BEFORE_1.0> sudo dnf versionlock add guestex

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-2006-0777?

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

Is CVE-2006-0777 being exploited?

CVE-2006-0777 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-2006-0777 affect?

CVE-2006-0777 affects guestex. Severity is high (CVSS 7.5). Unspecified vulnerability in guestex.pl in Teca Scripts Guestex 1.0 allows remote attackers to execute arbitrary shell commands via the email parameter, possibly involving shell metacharacters.

How urgent is CVE-2006-0777?

Priority 47/100. High severity

Related CVEs

CVE-2006-0776 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in guestex.pl in Teca Scripts Guestex 1.0 allows remote attackers to

References

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