CVE-2026-35085: A remote attacker with user privileges can exploit a stack buffer overflow in gdv-serverconfig to gain full sy

Q: How do I fix CVE-2026-35085?

universal gateway firmware: upgrade to 6_00_07. Exact commands for each OS are on this page.

Q: Is CVE-2026-35085 being exploited?

CVE-2026-35085 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-2026-35085 affect?

CVE-2026-35085 affects universal gateway firmware. Severity is high (CVSS 8.8). A remote attacker with user privileges can exploit a stack buffer overflow in gdv-serverconfig to gain full system access as root.

This month

HIGH 8.8UPGRADE

CVE-2026-35085 is a high-severity flaw (CVSS 8.8) affecting universal gateway firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A remote attacker with user privileges can exploit a stack buffer overflow in gdv-serverconfig to gain full system access as root.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 60%)
CISA exploited list	No
Weakness	CWE-121
Published	2026-06-03
Last modified	2026-07-22

Publisher (CNA): CERT VDE · Vendor: mbs-solutions

Last updated 2026-07-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-03 13:16 UTCPublished CVE record published
2026-07-22 19:10 UTCUpdated Record last modified

mbs-solutions universal gateway firmware UPGRADE

Affected: < 6_00_07

Fixed in: 6_00_07

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.

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-2026-35085?

universal gateway firmware: upgrade to 6_00_07. Exact commands for each OS are on this page.

Is CVE-2026-35085 being exploited?

CVE-2026-35085 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-2026-35085 affect?

CVE-2026-35085 affects universal gateway firmware. Severity is high (CVSS 8.8). A remote attacker with user privileges can exploit a stack buffer overflow in gdv-serverconfig to gain full system access as root.

How urgent is CVE-2026-35085?

Priority 41/100. High severity

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References

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