CVE-2015-2864: Retrospect and Retrospect Client before 10.0.2.119 on Windows, before 12.0.2.116 on OS X, and before 10.0.2.10

This month

MEDIUM 5.0DOWNGRADEDOWNGRADEDOWNGRADE

CVE-2015-2864 is a medium-severity flaw (CVSS 5.0) affecting retrospect, retrospect, retrospect client. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Retrospect and Retrospect Client before 10.0.2.119 on Windows, before 12.0.2.116 on OS X, and before 10.0.2.104 on Linux improperly generate password hashes, which makes it easier for remote attackers to bypass authentication and obtain access to backup files by leveraging a collision.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	3.3% (top 11%)
CISA exploited list	No
Weakness	CWE-255
Published	2015-09-21
Last modified	2026-06-17

Publisher (CNA): CERT/CC · Vendor: retrospect

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

Am I affected?

Timeline

2015-09-21 10:59 UTCPublished CVE record published
2026-06-17 00:24 UTCUpdated Record last modified

retrospect retrospect DOWNGRADE

Affected: 10.0.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.0.2

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 10.0.2 (Debian / Ubuntu)

apt-cache madison retrospect sudo apt install retrospect=<VERSION_BEFORE_10.0.2> sudo apt-mark hold retrospect

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

dnf --showduplicates list retrospect sudo dnf downgrade retrospect-<VERSION_BEFORE_10.0.2> sudo dnf versionlock add retrospect

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.

retrospect retrospect DOWNGRADE

Affected: 12.0.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 12.0.2

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 12.0.2 (Debian / Ubuntu)

apt-cache madison retrospect sudo apt install retrospect=<VERSION_BEFORE_12.0.2> sudo apt-mark hold retrospect

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

dnf --showduplicates list retrospect sudo dnf downgrade retrospect-<VERSION_BEFORE_12.0.2> sudo dnf versionlock add retrospect

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.

retrospect retrospect client DOWNGRADE

Affected: 10.0.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.0.2

1. Check installed version

apt-cache policy retrospect-client || rpm -q retrospect-client || retrospect-client --version

2. No fixed release: DOWNGRADE to a release before 10.0.2 (Debian / Ubuntu)

apt-cache madison retrospect-client sudo apt install retrospect-client=<VERSION_BEFORE_10.0.2> sudo apt-mark hold retrospect-client

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

dnf --showduplicates list retrospect-client sudo dnf downgrade retrospect-client-<VERSION_BEFORE_10.0.2> sudo dnf versionlock add retrospect-client

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.

retrospect retrospect client DOWNGRADE

Affected: 10.0.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.0.2

1. Check installed version

apt-cache policy retrospect-client || rpm -q retrospect-client || retrospect-client --version

2. No fixed release: DOWNGRADE to a release before 10.0.2 (Debian / Ubuntu)

apt-cache madison retrospect-client sudo apt install retrospect-client=<VERSION_BEFORE_10.0.2> sudo apt-mark hold retrospect-client

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

dnf --showduplicates list retrospect-client sudo dnf downgrade retrospect-client-<VERSION_BEFORE_10.0.2> sudo dnf versionlock add retrospect-client

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.

retrospect retrospect client DOWNGRADE

Affected: 12.0.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 12.0.2

1. Check installed version

apt-cache policy retrospect-client || rpm -q retrospect-client || retrospect-client --version

2. No fixed release: DOWNGRADE to a release before 12.0.2 (Debian / Ubuntu)

apt-cache madison retrospect-client sudo apt install retrospect-client=<VERSION_BEFORE_12.0.2> sudo apt-mark hold retrospect-client

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

dnf --showduplicates list retrospect-client sudo dnf downgrade retrospect-client-<VERSION_BEFORE_12.0.2> sudo dnf versionlock add retrospect-client

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-2015-2864?

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

Is CVE-2015-2864 being exploited?

CVE-2015-2864 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-2015-2864 affect?

CVE-2015-2864 affects retrospect, retrospect, retrospect client. Severity is medium (CVSS 5.0). Retrospect and Retrospect Client before 10.0.2.119 on Windows, before 12.0.2.116 on OS X, and before 10.0.2.104 on Linux improperly generate password hashes, which makes it easier for remote attackers to bypass authentication and obtain acc

How urgent is CVE-2015-2864?

Priority 45/100. Public exploit reference

Software pages

Windows vulnerabilities

References

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