CVE-2015-0556: Open-source ARJ archiver 3.10.22 allows remote attackers to conduct directory traversal attacks via a symlink

Q: How do I fix CVE-2015-0556?

arj archiver: upgrade to newer than 3.10.22; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2015-0556 being exploited?

CVE-2015-0556 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-2015-0556 affect?

CVE-2015-0556 affects arj archiver, fedora. Severity is medium (CVSS 5.8). Open-source ARJ archiver 3.10.22 allows remote attackers to conduct directory traversal attacks via a symlink attack in an ARJ archive.

Q: How urgent is CVE-2015-0556?

Priority 53/100. EPSS top 10%: very likely to be exploited; Public exploit reference; On your watchlist

This month

MEDIUM 5.8WATCHLISTUPGRADEMITIGATE

CVE-2015-0556 is a medium-severity flaw (CVSS 5.8) affecting arj archiver, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Open-source ARJ archiver 3.10.22 allows remote attackers to conduct directory traversal attacks via a symlink attack in an ARJ archive.

Why this priority

EPSS top 10%: very likely to be exploited
Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	5.8 (Medium)
EPSS exploit chance	3.8% (top 10%)
CISA exploited list	No
Weakness	CWE-59
Published	2015-04-08
Last modified	2026-06-17

Publisher (CNA): Debian GNU/Linux · Vendor: arj software · fedoraproject

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

Am I affected?

Timeline

2015-04-08 18:59 UTCPublished CVE record published
2026-06-17 00:20 UTCUpdated Record last modified

arj software arj archiver UPGRADE

Affected: <= 3.10.22

Fixed in: newer than 3.10.22

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy arj-archiver || rpm -q arj-archiver || arj-archiver --version

2. UPGRADE to newer than 3.10.22 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade arj-archiver

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade arj-archiver

Note

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

fedoraproject fedora MITIGATE

Affected: 20 · 21 · 22

Fixed in: no fixed release known

Safe to downgrade to: a release before 20

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2015-0556?

arj archiver: upgrade to newer than 3.10.22; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2015-0556 being exploited?

CVE-2015-0556 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-2015-0556 affect?

CVE-2015-0556 affects arj archiver, fedora. Severity is medium (CVSS 5.8). Open-source ARJ archiver 3.10.22 allows remote attackers to conduct directory traversal attacks via a symlink attack in an ARJ archive.

How urgent is CVE-2015-0556?

Priority 53/100. EPSS top 10%: very likely to be exploited; Public exploit reference; On your watchlist

Related CVEs

CVE-2015-2782 HIGH 7.5 MITIGATE MITIGATE Buffer overflow in Open-source ARJ archiver 3.10.22 allows remote attackers to cause a denial of service (cras
CVE-2015-0557 MEDIUM 5.8 UPGRADE MITIGATE Open-source ARJ archiver 3.10.22 does not properly remove leading slashes from paths, which allows remote atta

References

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