CVE-2015-8621: t-coffee before 11.00.8cbe486-2 allows local users to write to ~/.t_coffee globally.

Q: How do I fix CVE-2015-8621?

t-coffee: upgrade to newer than 11.00.8cbe486-1. Exact commands for each OS are on this page.

Q: Is CVE-2015-8621 being exploited?

CVE-2015-8621 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2015-8621 affect?

CVE-2015-8621 affects t-coffee. Severity is medium (CVSS 5.5). t-coffee before 11.00.8cbe486-2 allows local users to write to ~/.t_coffee globally.

Q: How urgent is CVE-2015-8621?

Priority 27/100. No elevated risk signals yet.

Routine

MEDIUM 5.5UPGRADE

CVE-2015-8621 is a medium-severity flaw (CVSS 5.5) affecting t-coffee. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

t-coffee before 11.00.8cbe486-2 allows local users to write to ~/.t_coffee globally.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 69%)
CISA exploited list	No
Weakness	CWE-264
Published	2017-08-07
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: tcoffee

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2017-08-07 17:29 UTCPublished CVE record published
2026-06-17 00:34 UTCUpdated Record last modified

tcoffee t-coffee UPGRADE

Affected: <= 11.00.8cbe486-1

Fixed in: newer than 11.00.8cbe486-1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy t-coffee || rpm -q t-coffee || t-coffee --version

2. UPGRADE to newer than 11.00.8cbe486-1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade t-coffee

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade t-coffee

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2015-8621?

t-coffee: upgrade to newer than 11.00.8cbe486-1. Exact commands for each OS are on this page.

Is CVE-2015-8621 being exploited?

CVE-2015-8621 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-2015-8621 affect?

CVE-2015-8621 affects t-coffee. Severity is medium (CVSS 5.5). t-coffee before 11.00.8cbe486-2 allows local users to write to ~/.t_coffee globally.

How urgent is CVE-2015-8621?

Priority 27/100. No elevated risk signals yet.

References

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