Memory-address disclosure via uninitialized Boa response buffer
Published Oct 21, 2024 · Updated Jul 5, 2026
Information disclosure in Vilo Wi-Fi 5 Firmware 5.16.1.33 and earlier allows remote attackers to read memory addresses over the LAN. Boa builds an index response with sprintf while using the uninitialized destination buffer as a string input, returning residual stack data. No authentication is required; the disclosed stack and uClibc addresses can help bypass address randomization during a separate memory-corruption attack.
Summary
What happened
Information disclosure in Vilo Wi-Fi 5 Firmware 5.16.1.33 and earlier allows remote attackers to read memory addresses over the LAN. Boa builds an index response with sprintf while using the uninitialized destination buffer as a string input, returning residual stack data. No authentication is required; the disclosed stack and uClibc addresses can help bypass address randomization during a separate memory-corruption attack.
The record
- CVE
- CVE-2024-40090
- Published
- Oct 21, 2024
- Updated
- Jul 5, 2026
- Vendor
- Vilo Living
- Product
- Vilo Wi-Fi 5 Firmware
- Classifications
- CWE-319, T1210
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 21, 2024CVE publishedPublication date reported by the CVE source.
- Jul 5, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=5.16.1.33
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Vilo Boa memory-address leak reproductionproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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