CVE-2024-42385

Service interruption via malformed PEM certificate

Published Nov 18, 2024 · Updated Sep 8, 2026

Out-of-bounds write in Cesanta Mongoose 7.14 and Siemens Reyrolle 7SR5 before V2.70 allows local users to interrupt service. The built-in TLS PEM certificate parser mishandles unexpected delimiter characters and writes beyond a memory buffer while loading the certificate. Exploitation requires high privileges and user interaction to supply the malformed certificate; public advisories do not identify the exact parser function or whether interruption manifests as a crash or hang.

CVSS severity7.0
High
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in Cesanta Mongoose 7.14 and Siemens Reyrolle 7SR5 before V2.70 allows local users to interrupt service. The built-in TLS PEM certificate parser mishandles unexpected delimiter characters and writes beyond a memory buffer while loading the certificate. Exploitation requires high privileges and user interaction to supply the malformed certificate; public advisories do not identify the exact parser function or whether interruption manifests as a crash or hang.

The record

CVE
CVE-2024-42385
Published
Nov 18, 2024
Updated
Sep 8, 2026
Vendor
Cesanta
Product
Mongoose
Classifications
CWE-140, T1499.004
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Nov 18, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 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.

  1. Affected versionversion=0 <=7.14

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Cesanta · Mongooseversion=0 <=7.14
Siemens AG · Reyrolle 7SR5version=0 <V2.70

Published CVSS scores

7.0NIST NVDCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
4.0Nozomi Networks Inc.CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-140Improper Neutralization of Delimiters
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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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