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CVE-2023-28771

Critical · CVSS 9.8EPSS 99.3%CISA KEVCWE-78 · OS Command Injection

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Improper error message handling in Zyxel ZyWALL/USG series firmware versions 4.60 through 4.73, VPN series firmware versions 4.60 through 5.35, USG FLEX series firmware versions 4.60 through 5.35, and ATP series firmware versions 4.60 through 5.35, which could allow an unauthenticated attacker to execute some OS commands remotely by sending crafted packets to an affected device.

Published

Community ground truth

Community verdict

3 verdicts
Not a real issue

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Community real-world severity: Critical (Critical 3) — CVSS base score 9.8

In line with its CVSS base score.

Field notes & remediation

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  • 0
    Field note · Priya NairCurated

    Confirmed exploited in the wild — listed in the CISA KEV catalog (added 2023-05-31). Treat as real and prioritize patching over triage.

Same weaknessCWE-78 · OS Command Injection.