CVE-2007-2835: Multiple stack-based buffer overflows in (1) CCE_pinyin.c and (2) xl_pinyin.c in ImmModules/cce/ in unicon-imc

Routine

MEDIUM 6.8DOWNGRADE

CVE-2007-2835 is a medium-severity flaw (CVSS 6.8) affecting unicon-imc2. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple stack-based buffer overflows in (1) CCE_pinyin.c and (2) xl_pinyin.c in ImmModules/cce/ in unicon-imc2 3.0.4, as used by zhcon and other applications, allow local users to gain privileges via a long HOME environment variable.

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	0.3% (top 72%)
CISA exploited list	No
Published	2007-07-03
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: unicon-imc2

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

Am I affected?

Timeline

2007-07-03 01:30 UTCPublished CVE record published
2026-06-16 22:40 UTCUpdated Record last modified

unicon-imc2 unicon-imc2 DOWNGRADE

Affected: 3.0.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0.4

1. Check installed version

apt-cache policy unicon-imc2 || rpm -q unicon-imc2 || unicon-imc2 --version

2. No fixed release: DOWNGRADE to a release before 3.0.4 (Debian / Ubuntu)

apt-cache madison unicon-imc2 sudo apt install unicon-imc2=<VERSION_BEFORE_3.0.4> sudo apt-mark hold unicon-imc2

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

dnf --showduplicates list unicon-imc2 sudo dnf downgrade unicon-imc2-<VERSION_BEFORE_3.0.4> sudo dnf versionlock add unicon-imc2

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-2007-2835?

unicon-imc2: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2007-2835 being exploited?

CVE-2007-2835 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-2007-2835 affect?

CVE-2007-2835 affects unicon-imc2. Severity is medium (CVSS 6.8). Multiple stack-based buffer overflows in (1) CCE_pinyin.c and (2) xl_pinyin.c in ImmModules/cce/ in unicon-imc2 3.0.4, as used by zhcon and other applications, allow local users to gain privileges via a long HOME environment variable.

How urgent is CVE-2007-2835?

Priority 31/100. No elevated risk signals yet.

References

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