CVE-2019-6110: In OpenSSH 7.9, due to accepting and displaying arbitrary stderr output from the server, a malicious server (o

Q: How do I fix CVE-2019-6110?

openssh: upgrade to newer than 7.9; winscp: upgrade to newer than 5.13; element software: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2019-6110 being exploited?

CVE-2019-6110 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-2019-6110 affect?

CVE-2019-6110 affects openssh, winscp, element software. Severity is medium (CVSS 6.8). In OpenSSH 7.9, due to accepting and displaying arbitrary stderr output from the server, a malicious server (or Man-in-The-Middle attacker) can manipulate the client output, for example to use ANSI control codes to hide additional files bei

Q: How urgent is CVE-2019-6110?

Priority 58/100. EPSS top 2%: very likely to be exploited; Public exploit reference; On your watchlist

This week

MEDIUM 6.8WATCHLISTUPGRADEUPGRADEMITIGATE

CVE-2019-6110 is a medium-severity flaw (CVSS 6.8) affecting openssh, winscp, element software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In OpenSSH 7.9, due to accepting and displaying arbitrary stderr output from the server, a malicious server (or Man-in-The-Middle attacker) can manipulate the client output, for example to use ANSI control codes to hide additional files being transferred.

Why this priority

EPSS top 2%: very likely to be exploited
Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.8 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	24.9% (top 2%)
CISA exploited list	No
Weakness	CWE-838
Published	2019-01-31
Last modified	2026-10-14

Publisher (CNA): MITRE · Vendor: netapp · openbsd · siemens · winscp

Last updated 2026-10-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-01-31 18:29 UTCPublished CVE record published
2026-10-14 07:16 UTCUpdated Record last modified

openbsd openssh UPGRADE

Affected: <= 7.9

Fixed in: newer than 7.9

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 7.9 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade openssh

Note

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

winscp winscp UPGRADE

Affected: <= 5.13

Fixed in: newer than 5.13

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 5.13 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade winscp

Note

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

netapp element software MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy element-software || rpm -q element-software || element-software --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

netapp ontap select deploy MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ontap-select-deploy || rpm -q ontap-select-deploy || ontap-select-deploy --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

netapp storage automation store MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy storage-automation-store || rpm -q storage-automation-store || storage-automation-store --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

siemens scalance x204rna firmware UPGRADE

Affected: < 3.2.7

Fixed in: 3.2.7

Safe to downgrade to: no unaffected older release

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: OpenSSH SCP Client - Write Arbitrary Files
Exploit-DB: SCP Client - Multiple Vulnerabilities (SSHtranger Things)

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-2019-6110?

openssh: upgrade to newer than 7.9; winscp: upgrade to newer than 5.13; element software: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-6110 being exploited?

CVE-2019-6110 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-2019-6110 affect?

CVE-2019-6110 affects openssh, winscp, element software. Severity is medium (CVSS 6.8). In OpenSSH 7.9, due to accepting and displaying arbitrary stderr output from the server, a malicious server (or Man-in-The-Middle attacker) can manipulate the client output, for example to use ANSI control codes to hide additional files bei

How urgent is CVE-2019-6110?

Priority 58/100. EPSS top 2%: very likely to be exploited; Public exploit reference; On your watchlist

Software pages

OpenSSH vulnerabilities · Siemens vulnerabilities

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References

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