CVE-2005-0957: Bay Technical Associates RPC-3 Telnet Host 3.05 allows remote attackers to bypass authentication by pressing t

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HIGH 7.5DOWNGRADE

CVE-2005-0957 is a high-severity flaw (CVSS 7.5) affecting rpc3 telnet. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Bay Technical Associates RPC-3 Telnet Host 3.05 allows remote attackers to bypass authentication by pressing the escape and enter keys at the username prompt.

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	1.6% (top 24%)
CISA exploited list	No
Published	2005-03-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: bay technical associates

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

Am I affected?

Timeline

2005-03-31 05:00 UTCPublished CVE record published
2026-06-16 22:12 UTCUpdated Record last modified

bay technical associates rpc3 telnet DOWNGRADE

Affected: f_3.05

Fixed in: no fixed release known

Safe to downgrade to: a release before f_3.05

1. Check installed version

apt-cache policy rpc3-telnet || rpm -q rpc3-telnet || rpc3-telnet --version

2. No fixed release: DOWNGRADE to a release before f_3.05 (Debian / Ubuntu)

apt-cache madison rpc3-telnet sudo apt install rpc3-telnet=<VERSION_BEFORE_f_3.05> sudo apt-mark hold rpc3-telnet

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

dnf --showduplicates list rpc3-telnet sudo dnf downgrade rpc3-telnet-<VERSION_BEFORE_f_3.05> sudo dnf versionlock add rpc3-telnet

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-2005-0957?

rpc3 telnet: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2005-0957 being exploited?

CVE-2005-0957 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-2005-0957 affect?

CVE-2005-0957 affects rpc3 telnet. Severity is high (CVSS 7.5). Bay Technical Associates RPC-3 Telnet Host 3.05 allows remote attackers to bypass authentication by pressing the escape and enter keys at the username prompt.

How urgent is CVE-2005-0957?

Priority 45/100. High severity

References

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