CVE-2006-1061: Heap-based buffer overflow in cURL and libcURL 7.15.0 through 7.15.2 allows remote attackers to execute arbitr

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HIGH 7.5DOWNGRADE

CVE-2006-1061 is a high-severity flaw (CVSS 7.5) affecting curl. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Heap-based buffer overflow in cURL and libcURL 7.15.0 through 7.15.2 allows remote attackers to execute arbitrary commands via a TFTP URL (tftp://) with a valid hostname and a long path.

Why this priority

High severity
EPSS top 7%: very likely to be exploited

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	5.3% (top 7%)
CISA exploited list	No
Published	2006-03-21
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: daniel stenberg

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

Am I affected?

Timeline

2006-03-21 01:06 UTCPublished CVE record published
2026-06-16 22:21 UTCUpdated Record last modified

daniel stenberg curl DOWNGRADE

Affected: 7.15.0 · 7.15.1 · 7.15.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.15.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 7.15.0 (Debian / Ubuntu)

apt-cache madison curl sudo apt install curl=<VERSION_BEFORE_7.15.0> sudo apt-mark hold curl

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

dnf --showduplicates list curl sudo dnf downgrade curl-<VERSION_BEFORE_7.15.0> sudo dnf versionlock add curl

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-2006-1061?

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

Is CVE-2006-1061 being exploited?

CVE-2006-1061 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-2006-1061 affect?

CVE-2006-1061 affects curl. Severity is high (CVSS 7.5). Heap-based buffer overflow in cURL and libcURL 7.15.0 through 7.15.2 allows remote attackers to execute arbitrary commands via a TFTP URL (tftp://) with a valid hostname and a long path.

How urgent is CVE-2006-1061?

Priority 49/100. High severity; EPSS top 7%: very likely to be exploited

Software pages

curl vulnerabilities

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References

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