CVE-2018-6290: Local Privilege Escalation in Kaspersky Secure Mail Gateway version 1.1.

This month

HIGH 7.8DOWNGRADE

CVE-2018-6290 is a high-severity flaw (CVSS 7.8) affecting secure mail gateway. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Local Privilege Escalation in Kaspersky Secure Mail Gateway version 1.1.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 58%)
CISA exploited list	No
Published	2018-02-06
Last modified	2026-06-17

Publisher (CNA): Kaspersky Labs · Vendor: kaspersky

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

Am I affected?

Timeline

2018-02-06 15:29 UTCPublished CVE record published
2026-06-17 02:01 UTCUpdated Record last modified

kaspersky secure mail gateway DOWNGRADE

Affected: 1.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1

1. Check installed version

apt-cache policy secure-mail-gateway || rpm -q secure-mail-gateway || secure-mail-gateway --version

2. No fixed release: DOWNGRADE to a release before 1.1 (Debian / Ubuntu)

apt-cache madison secure-mail-gateway sudo apt install secure-mail-gateway=<VERSION_BEFORE_1.1> sudo apt-mark hold secure-mail-gateway

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

dnf --showduplicates list secure-mail-gateway sudo dnf downgrade secure-mail-gateway-<VERSION_BEFORE_1.1> sudo dnf versionlock add secure-mail-gateway

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-2018-6290?

secure mail gateway: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-6290 being exploited?

CVE-2018-6290 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-2018-6290 affect?

CVE-2018-6290 affects secure mail gateway. Severity is high (CVSS 7.8). Local Privilege Escalation in Kaspersky Secure Mail Gateway version 1.1.

How urgent is CVE-2018-6290?

Priority 43/100. High severity; Public exploit reference

Software pages

Kaspersky vulnerabilities

Related CVEs

CVE-2018-6291 MEDIUM 6.1 DOWNGRADE WebConsole Cross-Site Scripting in Kaspersky Secure Mail Gateway version 1.1.
CVE-2018-6289 CRITICAL 9.8 DOWNGRADE Configuration file injection leading to Code Execution as Root in Kaspersky Secure Mail Gateway version 1.1.
CVE-2018-6288 HIGH 8.8 DOWNGRADE Cross-site Request Forgery leading to Administrative account takeover in Kaspersky Secure Mail Gateway version
CVE-2013-6037 MEDIUM 4.3 UPGRADE Cross-site scripting (XSS) vulnerability in index.php in Aker Secure Mail Gateway 2.5.2 and earlier allows rem

References

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