CVE-2019-6266: Cordaware bestinformed Microsoft Windows client before 6.2.1.0 is affected by insecure SSL certificate verific

Q: How do I fix CVE-2019-6266?

bestinformed: upgrade to 6.2.1.0. Exact commands for each OS are on this page.

Q: Is CVE-2019-6266 being exploited?

CVE-2019-6266 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-2019-6266 affect?

CVE-2019-6266 affects bestinformed. Severity is critical (CVSS 9.8). Cordaware bestinformed Microsoft Windows client before 6.2.1.0 is affected by insecure SSL certificate verification and insecure access patterns. These issues allow remote attackers to downgrade encrypted connections to cleartext.

Q: How urgent is CVE-2019-6266?

Priority 61/100. Critical severity; Remotely exploitable, no login, no user action; On your watchlist

This week

CRITICAL 9.8REMOTEWATCHLISTUPGRADE

CVE-2019-6266 is a critical-severity flaw (CVSS 9.8) affecting bestinformed. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cordaware bestinformed Microsoft Windows client before 6.2.1.0 is affected by insecure SSL certificate verification and insecure access patterns. These issues allow remote attackers to downgrade encrypted connections to cleartext.

Why this priority

Critical severity
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	1.2% (top 32%)
CISA exploited list	No
Weakness	CWE-295
Published	2019-02-25
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: cordaware

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

Am I affected?

Timeline

2019-02-25 23:29 UTCPublished CVE record published
2026-06-17 02:38 UTCUpdated Record last modified

cordaware bestinformed UPGRADE

Affected: < 6.2.1.0

Fixed in: 6.2.1.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 6.2.1.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade bestinformed

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-2019-6266?

bestinformed: upgrade to 6.2.1.0. Exact commands for each OS are on this page.

Is CVE-2019-6266 being exploited?

CVE-2019-6266 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-2019-6266 affect?

CVE-2019-6266 affects bestinformed. Severity is critical (CVSS 9.8). Cordaware bestinformed Microsoft Windows client before 6.2.1.0 is affected by insecure SSL certificate verification and insecure access patterns. These issues allow remote attackers to downgrade encrypted connections to cleartext.

How urgent is CVE-2019-6266?

Priority 61/100. Critical severity; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Windows vulnerabilities

Related CVEs

CVE-2019-6265 HIGH 7.8 UPGRADE The Scripting and AutoUpdate functionality in Cordaware bestinformed Microsoft Windows client versions before

References

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