Vulnerability Database

383,426

Total vulnerabilities in the database

CVE-2019-5255 — huawei / ap2000_firmware

Out-of-bounds Read

Certain Huawei products (AP2000;IPS Module;NGFW Module;NIP6300;NIP6600;NIP6800;S5700;SVN5600;SVN5800;SVN5800-C;SeMG9811;Secospace AntiDDoS8000;Secospace USG6300;Secospace USG6500;Secospace USG6600;USG6000V;eSpace U1981) have a DoS vulnerability. An attacker may send crafted messages from a FTP client to exploit this vulnerability. Due to insufficient validation of the message, successful exploit may cause the system out-of-bounds read and result in a denial of service condition of the affected service.

  • Published: Dec 13, 2019
  • Updated: Sep 13, 2026
  • CVE: CVE-2019-5255
  • Severity: Medium
  • Exploit:
  • CISA KEV:

CVSS v3:

  • Severity: Medium
  • Score: 5.5
  • AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v2:

  • Severity: Low
  • Score: 2.1
  • AV:L/AC:L/Au:N/C:N/I:N/A:P

CWEs:

Software Affected versions
huawei / ap2000_firmware = 200r005c30
huawei / ap2000_firmware = 200r006c10
huawei / ap2000_firmware = 200r006c20
huawei / ap2000_firmware = 200r007c10
huawei / ap2000_firmware = 200r007c20
huawei / ap2000_firmware = 200r008c00
huawei / ap2000_firmware = 200r008c10
huawei / ap2000_firmware = 200r009c00
huawei / ips_firmware = 500r001c00spc300
huawei / ips_firmware = 500r001c00spc500
huawei / ips_firmware = 500r001c00sph303
huawei / ips_firmware = 500r001c00sph508
huawei / ips_firmware = 500r001c20
huawei / ips_firmware = 500r001c20spc100
huawei / ips_firmware = 500r001c20spc100pwe
huawei / ips_firmware = 500r001c20spc200
huawei / ips_firmware = 500r001c20spc200b062
huawei / ips_firmware = 500r001c20spc200pwe
huawei / ips_firmware = 500r001c20spc300b078
huawei / ips_firmware = 500r001c20spc300pwe
huawei / ips_firmware = 500r001c30
huawei / ips_firmware = 500r001c30spc100
huawei / ips_firmware = 500r001c30spc100pwe
huawei / ips_firmware = 500r001c30spc200
huawei / ips_firmware = 500r001c30spc200pwe
huawei / ips_firmware = 500r001c30spc300
huawei / ips_firmware = 500r001c50
huawei / ips_firmware = 500r001c50pwe
huawei / ips_firmware = 500r001c80
huawei / ips_firmware = 500r005c00
huawei / ngfw_firmware = 500r001c00spc300
huawei / ngfw_firmware = 500r001c00spc500
huawei / ngfw_firmware = 500r001c00spc500pwe
huawei / ngfw_firmware = 500r001c00sph303
huawei / ngfw_firmware = 500r001c00sph508
huawei / ngfw_firmware = 500r001c20
huawei / ngfw_firmware = 500r001c20spc100
huawei / ngfw_firmware = 500r001c20spc100pwe
huawei / ngfw_firmware = 500r001c20spc200
huawei / ngfw_firmware = 500r001c20spc200b062
huawei / ngfw_firmware = 500r001c20spc200pwe
huawei / ngfw_firmware = 500r001c20spc300b078
huawei / ngfw_firmware = 500r001c20spc300pwe
huawei / ngfw_firmware = 500r002c00
huawei / ngfw_firmware = 500r002c00spc100
huawei / ngfw_firmware = 500r002c00spc100pwe
huawei / ngfw_firmware = 500r002c00spc200
huawei / ngfw_firmware = 500r002c00spc200pwe
huawei / ngfw_firmware = 500r002c00spc300
huawei / ngfw_firmware = 500r002c10
huawei / ngfw_firmware = 500r002c10pwe
huawei / ngfw_firmware = 500r002c30
huawei / ngfw_firmware = 500r002c30pwe
huawei / ngfw_firmware = 500r005c00
huawei / nip6300_firmware = 500r001c00spc300
huawei / nip6300_firmware = 500r001c00spc500
huawei / nip6300_firmware = 500r001c00sph303
huawei / nip6300_firmware = 500r001c00sph508
huawei / nip6300_firmware = 500r001c20
huawei / nip6300_firmware = 500r001c20spc100
huawei / nip6300_firmware = 500r001c20spc100pwe
huawei / nip6300_firmware = 500r001c20spc200
huawei / nip6300_firmware = 500r001c20spc200b062
huawei / nip6300_firmware = 500r001c20spc200pwe
huawei / nip6300_firmware = 500r001c20spc300b078
huawei / nip6300_firmware = 500r001c20spc300pwe
huawei / nip6300_firmware = 500r001c30
huawei / nip6300_firmware = 500r001c30spc100
huawei / nip6300_firmware = 500r001c30spc100pwe
huawei / nip6300_firmware = 500r001c30spc200
huawei / nip6300_firmware = 500r001c30spc200pwe
huawei / nip6300_firmware = 500r001c30spc300
huawei / nip6300_firmware = 500r001c50
huawei / nip6300_firmware = 500r001c50pwe
huawei / nip6300_firmware = 500r001c80
huawei / nip6300_firmware = 500r005c00
huawei / nip6600_firmware = 500r001c00spc300
huawei / nip6600_firmware = 500r001c00spc500
huawei / nip6600_firmware = 500r001c00sph303
huawei / nip6600_firmware = 500r001c00sph508
huawei / nip6600_firmware = 500r001c20
huawei / nip6600_firmware = 500r001c20spc100
huawei / nip6600_firmware = 500r001c20spc100pwe
huawei / nip6600_firmware = 500r001c20spc200
huawei / nip6600_firmware = 500r001c20spc200b062
huawei / nip6600_firmware = 500r001c20spc200pwe
huawei / nip6600_firmware = 500r001c20spc300b078
huawei / nip6600_firmware = 500r001c30
huawei / nip6600_firmware = 500r001c30spc100
huawei / nip6600_firmware = 500r001c30spc100pwe
huawei / nip6600_firmware = 500r001c30spc200
huawei / nip6600_firmware = 500r001c30spc200pwe
huawei / nip6600_firmware = 500r001c30spc300
huawei / nip6600_firmware = 500r001c50
huawei / nip6600_firmware = 500r001c50pwe
huawei / nip6600_firmware = 500r001c80
huawei / nip6600_firmware = 500r005c00
huawei / nip6800_firmware = 500r001c50
huawei / nip6800_firmware = 500r001c50pwe
huawei / nip6800_firmware = 500r001c80
huawei / nip6800_firmware = 500r005c00
huawei / s5700_firmware = 200r005c03
huawei / svn5600_firmware = 200r003c00spc100
huawei / svn5800_firmware = 200r003c00spc100
huawei / svn5800-c_firmware = 200r003c00spc100
huawei / semg9811_firmware = 500r002c20
huawei / semg9811_firmware = 500r002c30
huawei / semg9811_firmware = 500r005c00
huawei / secospace_antiddos8000_firmware = 500r001c00
huawei / secospace_antiddos8000_firmware = 500r001c00spc200
huawei / secospace_antiddos8000_firmware = 500r001c00spc300
huawei / secospace_antiddos8000_firmware = 500r001c00spc500
huawei / secospace_antiddos8000_firmware = 500r001c00spc600
huawei / secospace_antiddos8000_firmware = 500r001c00spc700
huawei / secospace_antiddos8000_firmware = 500r001c00sph303
huawei / secospace_antiddos8000_firmware = 500r001c20spc200
huawei / secospace_antiddos8000_firmware = 500r001c20spc300
huawei / secospace_antiddos8000_firmware = 500r001c20spc500
huawei / secospace_antiddos8000_firmware = 500r001c20spc600
huawei / secospace_antiddos8000_firmware = 500r001c60spc100
huawei / secospace_antiddos8000_firmware = 500r001c60spc101
huawei / secospace_antiddos8000_firmware = 500r001c60spc200
huawei / secospace_antiddos8000_firmware = 500r001c60spc300
huawei / secospace_antiddos8000_firmware = 500r001c60spc500
huawei / secospace_antiddos8000_firmware = 500r001c60spc600
huawei / secospace_antiddos8000_firmware = 500r005c00
huawei / secospace_antiddos8000_firmware = 500r005c00spc100
huawei / secospace_usg6300_firmware = 100r001c20spc100
huawei / secospace_usg6300_firmware = 500r001c00spc300
huawei / secospace_usg6300_firmware = 500r001c00spc500
huawei / secospace_usg6300_firmware = 500r001c00spc500pwe
huawei / secospace_usg6300_firmware = 500r001c00sph303
huawei / secospace_usg6300_firmware = 500r001c00sph508
huawei / secospace_usg6300_firmware = 500r001c20
huawei / secospace_usg6300_firmware = 500r001c20spc100
huawei / secospace_usg6300_firmware = 500r001c20spc100pwe
huawei / secospace_usg6300_firmware = 500r001c20spc101
huawei / secospace_usg6300_firmware = 500r001c20spc200
huawei / secospace_usg6300_firmware = 500r001c20spc200b062
huawei / secospace_usg6300_firmware = 500r001c20spc200pwe
huawei / secospace_usg6300_firmware = 500r001c20spc300b078
huawei / secospace_usg6300_firmware = 500r001c20spc300pwe
huawei / secospace_usg6300_firmware = 500r001c30
huawei / secospace_usg6300_firmware = 500r001c30spc100
huawei / secospace_usg6300_firmware = 500r001c30spc100pwe
huawei / secospace_usg6300_firmware = 500r001c30spc200
huawei / secospace_usg6300_firmware = 500r001c30spc200pwe
huawei / secospace_usg6300_firmware = 500r001c30spc300
huawei / secospace_usg6300_firmware = 500r001c50
huawei / secospace_usg6300_firmware = 500r001c50pwe
huawei / secospace_usg6300_firmware = 500r001c80
huawei / secospace_usg6300_firmware = 500r001c80pwe
huawei / secospace_usg6300_firmware = 500r005c00
huawei / secospace_usg6500_firmware = 100r001c20spc100
huawei / secospace_usg6500_firmware = 500r001c00spc300
huawei / secospace_usg6500_firmware = 500r001c00spc500
huawei / secospace_usg6500_firmware = 500r001c00spc500pwe
huawei / secospace_usg6500_firmware = 500r001c00sph303
huawei / secospace_usg6500_firmware = 500r001c00sph508
huawei / secospace_usg6500_firmware = 500r001c20
huawei / secospace_usg6500_firmware = 500r001c20spc100
huawei / secospace_usg6500_firmware = 500r001c20spc100pwe
huawei / secospace_usg6500_firmware = 500r001c20spc101
huawei / secospace_usg6500_firmware = 500r001c20spc200
huawei / secospace_usg6500_firmware = 500r001c20spc200b062
huawei / secospace_usg6500_firmware = 500r001c20spc200pwe
huawei / secospace_usg6500_firmware = 500r001c20spc300b078
huawei / secospace_usg6500_firmware = 500r001c20spc300pwe
huawei / secospace_usg6500_firmware = 500r001c30
huawei / secospace_usg6500_firmware = 500r001c30spc100
huawei / secospace_usg6500_firmware = 500r001c30spc100pwe
huawei / secospace_usg6500_firmware = 500r001c30spc200
huawei / secospace_usg6500_firmware = 500r001c30spc200pwe
huawei / secospace_usg6500_firmware = 500r001c30spc300
huawei / secospace_usg6500_firmware = 500r001c50
huawei / secospace_usg6500_firmware = 500r001c50pwe
huawei / secospace_usg6500_firmware = 500r001c80
huawei / secospace_usg6500_firmware = 500r001c80pwe
huawei / secospace_usg6500_firmware = 500r005c00
huawei / secospace_usg6600_firmware = 100r001c00spc200
huawei / secospace_usg6600_firmware = 100r001c10spc200
huawei / secospace_usg6600_firmware = 100r001c10spc201
huawei / secospace_usg6600_firmware = 100r001c20spc100
huawei / secospace_usg6600_firmware = 100r001c20spc200
huawei / secospace_usg6600_firmware = 500r001c00
huawei / secospace_usg6600_firmware = 500r001c00spc050
huawei / secospace_usg6600_firmware = 500r001c00spc090
huawei / secospace_usg6600_firmware = 500r001c00spc300
huawei / secospace_usg6600_firmware = 500r001c00spc500
huawei / secospace_usg6600_firmware = 500r001c00spc500pwe
huawei / secospace_usg6600_firmware = 500r001c00sph303
huawei / secospace_usg6600_firmware = 500r001c20
huawei / secospace_usg6600_firmware = 500r001c20spc100
huawei / secospace_usg6600_firmware = 500r001c20spc100pwe
huawei / secospace_usg6600_firmware = 500r001c20spc101
huawei / secospace_usg6600_firmware = 500r001c20spc200
huawei / secospace_usg6600_firmware = 500r001c20spc200pwe
huawei / secospace_usg6600_firmware = 500r001c20spc300
huawei / secospace_usg6600_firmware = 500r001c20spc300b078
huawei / secospace_usg6600_firmware = 500r001c20spc300pwe
huawei / secospace_usg6600_firmware = 500r001c30
huawei / secospace_usg6600_firmware = 500r001c30spc100
huawei / secospace_usg6600_firmware = 500r001c30spc100pwe
huawei / secospace_usg6600_firmware = 500r001c30spc200
huawei / secospace_usg6600_firmware = 500r001c30spc200pwe
huawei / secospace_usg6600_firmware = 500r001c30spc300
huawei / secospace_usg6600_firmware = 500r001c30spc500
huawei / secospace_usg6600_firmware = 500r001c30spc600
huawei / secospace_usg6600_firmware = 500r001c30spc600pwe
huawei / secospace_usg6600_firmware = 500r001c30spc601
huawei / secospace_usg6600_firmware = 500r001c50
huawei / secospace_usg6600_firmware = 500r001c50pwe
huawei / secospace_usg6600_firmware = 500r001c50spc009
huawei / secospace_usg6600_firmware = 500r001c50spc100
huawei / secospace_usg6600_firmware = 500r001c50spc100pwe
huawei / secospace_usg6600_firmware = 500r001c50spc200
huawei / secospace_usg6600_firmware = 500r001c50spc200pwe
huawei / secospace_usg6600_firmware = 500r001c50spc300
huawei / secospace_usg6600_firmware = 500r001c60
huawei / secospace_usg6600_firmware = 500r001c60spc100
huawei / secospace_usg6600_firmware = 500r001c60spc100pwe
huawei / secospace_usg6600_firmware = 500r001c60spc200
huawei / secospace_usg6600_firmware = 500r001c60spc200pwe
huawei / secospace_usg6600_firmware = 500r001c60spc300
huawei / secospace_usg6600_firmware = 500r001c60spc500
huawei / secospace_usg6600_firmware = 500r001c80
huawei / secospace_usg6600_firmware = 500r001c80pwe
huawei / secospace_usg6600_firmware = 500r005c00
huawei / secospace_usg6600_firmware = 500r005c00spc100
huawei / secospace_usg6600_firmware = 500r005c00spc102
huawei / usg6000v_firmware = 500r001c10
huawei / usg6000v_firmware = 500r001c10spc100
huawei / usg6000v_firmware = 500r001c10spc200
huawei / usg6000v_firmware = 500r001c20
huawei / usg6000v_firmware = 500r001c20spc100
huawei / usg6000v_firmware = 500r001c20spc200
huawei / usg6000v_firmware = 500r001c20spc300
huawei / usg6000v_firmware = 500r001c20spc500
huawei / usg6000v_firmware = 500r001c20spc600
huawei / usg6000v_firmware = 500r003c00
huawei / usg6000v_firmware = 500r003c00spc100
huawei / usg6000v_firmware = 500r005c00
huawei / usg6000v_firmware = 500r005c00spc100
huawei / espace_u1981_firmware = 200r003c50spc700

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.