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Fencer Vulns
medium 4.3

CVE-2024-42391 json

Use of Out-of-range Pointer Offset in Mongoose Web Server library

published 2024-11-18 23 mo ago modified 2026-09-08 2 mo ago also EUVD-2024-39595

cvss
4.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 23%
public exploits
0
none known

Summary

Use of Out-of-range Pointer Offset vulnerability in Cesanta Mongoose Web Server v7.14 allows an attacker to send an unexpected TLS packet and force the application to read unintended heap memory space.

Patch / fix

  • Siemens Reyrolle 7SR5 V2.70

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
23 mo ago

Exploit prediction

0.30% chance of exploitation in the next 30 days, higher than 23% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected products

  • Cesanta Mongoose Web Server
  • Siemens Reyrolle 7SR5

Classification

Weakness
  • CWE-823 Use of Out-of-range Pointer Offset

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.