CVE-2007-2646: Heap-based buffer overflow in yEnc32 1.0.7.207 allows user-assisted remote attackers to execute arbitrary code

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MEDIUM 6.8DOWNGRADE

CVE-2007-2646 is a medium-severity flaw (CVSS 6.8) affecting yenc32. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Heap-based buffer overflow in yEnc32 1.0.7.207 allows user-assisted remote attackers to execute arbitrary code via a long filename in an NTX file.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	6.8 (Medium)
EPSS exploit chance	3.1% (top 12%)
CISA exploited list	No
Published	2007-05-14
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: yenc32

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

Am I affected?

Timeline

2007-05-14 21:19 UTCPublished CVE record published
2026-06-16 22:40 UTCUpdated Record last modified

yenc32 yenc32 DOWNGRADE

Affected: 1.0.7.207

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.7.207

1. Check installed version

apt-cache policy yenc32 || rpm -q yenc32 || yenc32 --version

2. No fixed release: DOWNGRADE to a release before 1.0.7.207 (Debian / Ubuntu)

apt-cache madison yenc32 sudo apt install yenc32=<VERSION_BEFORE_1.0.7.207> sudo apt-mark hold yenc32

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

dnf --showduplicates list yenc32 sudo dnf downgrade yenc32-<VERSION_BEFORE_1.0.7.207> sudo dnf versionlock add yenc32

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-2007-2646?

yenc32: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2007-2646 being exploited?

CVE-2007-2646 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-2007-2646 affect?

CVE-2007-2646 affects yenc32. Severity is medium (CVSS 6.8). Heap-based buffer overflow in yEnc32 1.0.7.207 allows user-assisted remote attackers to execute arbitrary code via a long filename in an NTX file.

How urgent is CVE-2007-2646?

Priority 46/100. No elevated risk signals yet.

References

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