CVE-2026-6805: Vulnerability on the external sharing feature in Cryptobox allows an attacker knowing a sharing link URL to re

Routine

HIGH 7.5REMOTEUPGRADE

CVE-2026-6805 is a high-severity flaw (CVSS 7.5) affecting ercom cryptobox. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Vulnerability on the external sharing feature in Cryptobox allows an attacker knowing a sharing link URL to retrieve information from the server allowing an offline brute-force attack of the access code associated to this sharing link.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 86%)
CISA exploited list	No
Weakness	CWE-280
Published	2026-05-07
Last modified	2026-10-25

Publisher (CNA): Thales Group · Vendor: thalesgroup

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-07 10:16 UTCPublished CVE record published
2026-10-25 23:10 UTCUpdated Record last modified

thalesgroup ercom cryptobox UPGRADE

Affected: >= 4.37.248 and < 4.38.0

Fixed in: 4.38.0

Safe to downgrade to: a release before 4.37.248

1. Check installed version

apt-cache policy ercom-cryptobox || rpm -q ercom-cryptobox || ercom-cryptobox --version

2. UPGRADE to 4.38.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ercom-cryptobox

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ercom-cryptobox

Note

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

3. If no update is available yet, DOWNGRADE to a release before 4.37.248 (Debian / Ubuntu)

apt-cache madison ercom-cryptobox sudo apt install ercom-cryptobox=<VERSION_BEFORE_4.37.248> sudo apt-mark hold ercom-cryptobox

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list ercom-cryptobox sudo dnf downgrade ercom-cryptobox-<VERSION_BEFORE_4.37.248> sudo dnf versionlock add ercom-cryptobox

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-2026-6805?

ercom cryptobox: upgrade to 4.38.0. Exact commands for each OS are on this page.

Is CVE-2026-6805 being exploited?

CVE-2026-6805 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-2026-6805 affect?

CVE-2026-6805 affects ercom cryptobox. Severity is high (CVSS 7.5). Vulnerability on the external sharing feature in Cryptobox allows an attacker knowing a sharing link URL to retrieve information from the server allowing an offline brute-force attack of the access code associated to this sharing link.

How urgent is CVE-2026-6805?

Priority 35/100. High severity; Remotely exploitable, no login, no user action

References

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