CVE-2003-0745: SNMPc 6.0.8 and earlier performs authentication to the server on the client side, which allows remote attacker

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HIGH 10.0DOWNGRADE

CVE-2003-0745 is a high-severity flaw (CVSS 10.0) affecting snmpc. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SNMPc 6.0.8 and earlier performs authentication to the server on the client side, which allows remote attackers to gain privileges by decrypting the password that is returned by the server.

Why this priority

Critical severity

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

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	2.5% (top 16%)
CISA exploited list	No
Published	2003-10-20
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: castle rock computing

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

Am I affected?

Timeline

2003-10-20 04:00 UTCPublished CVE record published
2026-06-16 22:02 UTCUpdated Record last modified

castle rock computing snmpc DOWNGRADE

Affected: 5.1 · 6.0 · 6.0.5 · 6.0.8

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 5.1 (Debian / Ubuntu)

apt-cache madison snmpc sudo apt install snmpc=<VERSION_BEFORE_5.1> sudo apt-mark hold snmpc

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

dnf --showduplicates list snmpc sudo dnf downgrade snmpc-<VERSION_BEFORE_5.1> sudo dnf versionlock add snmpc

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-2003-0745?

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

Is CVE-2003-0745 being exploited?

CVE-2003-0745 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-2003-0745 affect?

CVE-2003-0745 affects snmpc. Severity is high (CVSS 10.0). SNMPc 6.0.8 and earlier performs authentication to the server on the client side, which allows remote attackers to gain privileges by decrypting the password that is returned by the server.

How urgent is CVE-2003-0745?

Priority 56/100. Critical severity

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References

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