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CVE-2026-7255: ** UNSUPPORTED WHEN ASSIGNED ** An improper restriction of excessive authentication attempts vulnerability in

25
Routine
MEDIUM 6.5MITIGATE

CVE-2026-7255 is a medium-severity flaw (CVSS 6.5) affecting wre6505 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

** UNSUPPORTED WHEN ASSIGNED ** An improper restriction of excessive authentication attempts vulnerability in the web management interface of Zyxel WRE6505 v2 firmware version V1.00(ABDV.3)C0 could allow an adjacent attacker on the LAN to brute-force the password and bypass authentication.

Why this priority

  • No elevated risk signals yet

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

Risk facts

CVSS score6.5 (Medium)
Attack vectorAdjacent network
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance0.2% (top 90%)
CISA exploited listNo
WeaknessCWE-307
Published2026-05-12
Last modified2026-10-26
Publisher (CNA): Zyxel Corporation · Vendor: zyxel

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Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

zyxel wre6505 firmware MITIGATE
Affected: v1.00\(abdv.3\)c0
Fixed in: no fixed release known
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-2026-7255?

wre6505 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-7255 being exploited?

CVE-2026-7255 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-2026-7255 affect?

CVE-2026-7255 affects wre6505 firmware. Severity is medium (CVSS 6.5). ** UNSUPPORTED WHEN ASSIGNED ** An improper restriction of excessive authentication attempts vulnerability in the web management interface of Zyxel WRE6505 v2 firmware version V1.00(ABDV.3)C0 could allow an adjacent attacker on the LAN to b

How urgent is CVE-2026-7255?

Priority 25/100. No elevated risk signals yet.

Software pages

Zyxel vulnerabilities

Related CVEs

References

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