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CVE-2023-28770

67
FAUCET Score

CVE-2023-28770 is a sensitive information exposure vulnerability affecting Zyxel DX5401-B0 firmware versions prior to V5.17(ABYO.1)C0. A remote, unauthenticated attacker can exploit this flaw to read system files and retrieve the supervisor's password from an encrypted file. With a CVSS score of 7.5 (HIGH), this vulnerability is easily exploitable over the network with low attack complexity, leading to high confidentiality impact. While not yet in CISA KEV, a Metasploit module exists for chained RCE, indicating potential for active exploitation, despite minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 5.17\(abyo.1\)c0CPE matchmatch criteria
cpe:2.3:o:zyxel:dx5401-b0_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
57.78%
Probability of exploitation in next 30 days
EPSS Percentile
99.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Metasploit: Zyxel chained RCE using LFI and weak password derivation algorithm · Feb 1, 2022
This CVE's current EPSS score of 0.5778 is in the 98th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

packetstorm.news / files/id/172277
packetstormsecurity.com / files/172277/Zyxel-Chained-Remote-Code-Execution.html
zyxel.com / global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities
Vendor Advisory