CVE-2026-5245

LOW EPSS 49.1%
Published Apr 2, 20262mo ago · Modified Jun 17, 20261w ago
2.9 CVSS 4.0
Low
Find Similar
Published Apr 2, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago

Description

A vulnerability was found in Cesanta Mongoose up to 7.20. This impacts the function handle_mdns_record of the file mongoose.c of the component mDNS Record Handler. Performing a manipulation of the argument buf results in stack-based buffer overflow. Remote exploitation of the attack is possible. A high degree of complexity is needed for the attack. The exploitability is said to be difficult. The exploit has been made public and could be used. Upgrading to version 7.21 will fix this issue. The patch is named 0d882f1b43ff2308b7486a56a9d60cd6dba8a3f1. You should upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

CVSS Details

Base Score
2.9
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
49.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 2

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer Memory Safety
CWE-121

Affected Products 1

VendorProductVersionRange
cesantamongoose*≥7.0  –  <7.21

References 6

  • github.com https://github.com/cesanta/mongoose/
    Product
  • github.com https://github.com/cesanta/mongoose/commit/0d882f1b43ff2308b7486a56a9d60cd6dba8a3f1
    Patch
  • github.com https://github.com/cesanta/mongoose/releases/tag/7.21
    ProductRelease Notes
  • vuldb.com https://vuldb.com/submit/770103
    Third Party AdvisoryVDB Entry
  • vuldb.com https://vuldb.com/vuln/354826
    Third Party AdvisoryVDB Entry
  • vuldb.com https://vuldb.com/vuln/354826/cti
    Permissions RequiredVDB Entry

Remediation

  • github.com https://github.com/cesanta/mongoose/commit/0d882f1b43ff2308b7486a56a9d60cd6dba8a3f1
    Patch