CVE-2016-1253: The most package in Debian wheezy before 5.0.0a-2.2, in Debian jessie before 5.0.0a-2.3+deb8u1, and in Debian

Q: How do I fix CVE-2016-1253?

most: upgrade to 5.0.0a-2.2, 5.0.0a-2.3. Exact commands for each OS are on this page.

Q: Is CVE-2016-1253 being exploited?

CVE-2016-1253 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-2016-1253 affect?

CVE-2016-1253 affects most. Severity is critical (CVSS 9.8). The most package in Debian wheezy before 5.0.0a-2.2, in Debian jessie before 5.0.0a-2.3+deb8u1, and in Debian unstable before 5.0.0a-3 allows remote attackers to execute arbitrary commands via shell metacharacters in the name of an LZMA-com

Q: How urgent is CVE-2016-1253?

Priority 67/100. Critical severity; EPSS top 8%: very likely to be exploited; Remotely exploitable, no login, no user action; On your watchlist

This week

CRITICAL 9.8REMOTEWATCHLISTUPGRADE

CVE-2016-1253 is a critical-severity flaw (CVSS 9.8) affecting most. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The most package in Debian wheezy before 5.0.0a-2.2, in Debian jessie before 5.0.0a-2.3+deb8u1, and in Debian unstable before 5.0.0a-3 allows remote attackers to execute arbitrary commands via shell metacharacters in the name of an LZMA-compressed file.

Why this priority

Critical severity
EPSS top 8%: very likely to be exploited
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	4.8% (top 8%)
CISA exploited list	No
Weakness	CWE-78
Published	2017-12-05
Last modified	2026-06-17

Publisher (CNA): Debian GNU/Linux · Vendor: debian

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

Am I affected?

Timeline

2017-12-05 16:29 UTCPublished CVE record published
2026-06-17 00:41 UTCUpdated Record last modified

debian most UPGRADE

Affected: < 5.0.0a-2.2 · < 5.0.0a-2.3

Fixed in: 5.0.0a-2.2, 5.0.0a-2.3

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 5.0.0a-2.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade most

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade most

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-2016-1253?

most: upgrade to 5.0.0a-2.2, 5.0.0a-2.3. Exact commands for each OS are on this page.

Is CVE-2016-1253 being exploited?

CVE-2016-1253 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-2016-1253 affect?

CVE-2016-1253 affects most. Severity is critical (CVSS 9.8). The most package in Debian wheezy before 5.0.0a-2.2, in Debian jessie before 5.0.0a-2.3+deb8u1, and in Debian unstable before 5.0.0a-3 allows remote attackers to execute arbitrary commands via shell metacharacters in the name of an LZMA-com

How urgent is CVE-2016-1253?

Priority 67/100. Critical severity; EPSS top 8%: very likely to be exploited; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Debian vulnerabilities

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References

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