- Description
- 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.
- Source
- security@zyxel.com.tw
- NVD status
- Analyzed
- Products
- atp100_firmware, atp100w_firmware, atp200_firmware, atp500_firmware, atp700_firmware, atp800_firmware, usg_flex_100_firmware, usg_flex_100w_firmware, usg_flex_200_firmware, usg_flex_50_firmware, usg_flex_500_firmware, usg_flex_50w_firmware, usg_flex_700_firmware, vpn100_firmware, vpn1000_firmware, vpn300_firmware, vpn50_firmware, zywall_usg_310_firmware, zywall_usg_100_firmware
CVSS 3.1
- Type
- Secondary
- Base score
- 9.8
- Impact score
- 5.9
- Exploitability score
- 3.9
- Vector string
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Severity
- CRITICAL
Data from CISA
- Vulnerability name
- Zyxel Multiple Firewalls OS Command Injection Vulnerability
- Exploit added on
- May 31, 2023
- Exploit action due
- Jun 21, 2023
- Required action
- Apply updates per vendor instructions.
- Hype score
- Not currently trending
GreyNoise researchers have observed exploit attempts targeting the remote code execution vulnerability CVE-2023-28771 in Zyxel devices. On June 16, GreyNoise researchers detected exploit attempts targeting CVE-2023-2877... https://t.co/qlK9ZGhO2d
@pedri77
27 Mar 2026
39 Impressions
0 Retweets
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Zyxel 製品に対する標的型攻撃を検出：RCE 脆弱性 CVE-2023-28771 を悪用 https://t.co/kitBEIcl87 Zyxel 製品の RCE 脆弱性 CVE-2023-28771 を悪用する攻撃が検出されました。IKE ポートを通じた認証不要のコード実行という点と
@iototsecnews
30 Jun 2025
27 Impressions
0 Retweets
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🚨 Zyxel device owners, heads up! Active exploits are targeting CVE-2023-28771. Patch your devices ASAP to avoid compromise! #Cybersecurity #InfoSec https://t.co/TjGHzn39Fe
@xcybersecnews
28 Jun 2025
45 Impressions
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Attackers target Zyxel RCE vulnerability CVE-2023-28771 https://t.co/OEmFp8xLjL #cybersecurity https://t.co/m6YCtqsSAD
@cliffvazquez
26 Jun 2025
61 Impressions
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A serious security vulnerability, tracked as CVE-2023-28771, is affecting Zyxel networking devices. Security researchers at GreyNoise noticed a sudden sharp rise, and a concentrated effort by attackers to exploit this flaw on June 16th. https://t.co/ORwoSnPHsc
@blackwired32799
24 Jun 2025
10 Impressions
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Zyxel Devices Hit by Active Exploits Targeting CVE-2023-28771 Vulnerability https://t.co/ARv6FZsAP1 #infosec #security
@NotTruppi
23 Jun 2025
27 Impressions
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📢พบการโจมตีช่องโหว่ RCE บนอุปกรณ์ Zyxel ที่ช่องโหว่ CVE-2023-28771 #NCSA #CybersecurityNew สามารถติดตามข่าวสารได้ที่ https://t.co/HCsLrrYz4c https://t.
@ThaiCERTByNCSA
19 Jun 2025
6 Impressions
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Zyxel CVE-2023-28771 vulnerability resurfaces with increased attack attempts, possibly by Mirai botnet, targeting devices once exploited in Denmark’s critical infrastructure. Stay vigilant! ⚠️ #CyberAttack #Denmark #IoT https://t.co/Ng98xjBsVr
@TweetThreatNews
17 Jun 2025
33 Impressions
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