CVE-2023-28770: zyxel dx5401-b0_firmware
Vulnerability summary
CVE-2023-28770 is a high (CVSS 7.5) vulnerability in zyxel dx5401-b0_firmware. EPSS estimates a 57.78% chance of exploitation in the next 30 days, higher than 99% of scored vulnerabilities. 2 public exploits are recorded.
Timeline
- 27-04-2023PublishedVulnerability first disclosed.
- 31-01-2025Last modifiedVulnerability information updated.
Description
The sensitive information exposure vulnerability in the CGI “Export_Log” and the binary “zcmd” in Zyxel DX5401-B0 firmware versions prior to V5.17(ABYO.1)C0 could allow a remote unauthenticated attacker to read the system files and to retrieve the password of the supervisor from the encrypted file.
CVSS metrics
2 scores · 2 sources · 1 version- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS trend
Probability
57.78%
Chance of exploitation in the next 30 days
Percentile
99%
Versus all other CVEs
30-day change
0.00 pp
From 57.78% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
2 foundExploit Reference (packetstorm.news)
Maturity: unknown
Zyxel chained RCE using LFI and weak password derivation algorithm
exploit/linux/http/zyxel_lfi_unauth_ssh_rce
Maturity: weaponized
Weaknesses
CWE · root cause- CWE-200Exposure of Sensitive Information to an Unauthorized ActorThe product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
- CWE-203Observable DiscrepancyThe product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor.
Affected systems
Zyxel2 products
- dx5401-b0_firmware< 5.17\(abyo.1\)c0
- dx5401-b0 firmware< V5.17(ABYO.1)C0
1 vendor · 2 products
References
3 links- www.zyxel.com/global/…Vendor Advisory