CVE-2025-62799Public exploit

Subscriber crash via aligned fragment metadata overwrite

Published Feb 3, 2026 · Updated Feb 3, 2026

Heap buffer overflow in eProsima Fast DDS before 2.6.11, 3.0.0 through 3.3.0, and 3.4.0 allows remote attackers to crash subscribers. CacheChange_t aligns each fragment offset to four bytes and writes fragment metadata beyond a sampleSize-based payload allocation. Exploitation requires a reachable RELIABLE subscriber using unsecured RTPS over UDP and a crafted DATA_FRAG packet with inconsistent fragmentSize and sampleSize values.

CVSS severity9.6
Critical
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in eProsima Fast DDS before 2.6.11, 3.0.0 through 3.3.0, and 3.4.0 allows remote attackers to crash subscribers. CacheChange_t aligns each fragment offset to four bytes and writes fragment metadata beyond a sampleSize-based payload allocation. Exploitation requires a reachable RELIABLE subscriber using unsecured RTPS over UDP and a crafted DATA_FRAG packet with inconsistent fragmentSize and sampleSize values.

The record

CVE
CVE-2025-62799
Published
Feb 3, 2026
Updated
Feb 3, 2026
Vendor
eProsima
Product
Fast DDS
Classifications
CWE-131, CWE-400, CWE-122, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 3, 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 <2.6.11
  2. Affected versionversion=3.0.0 <3.3.1
  3. Affected versionversion=3.4.0 <3.4.1

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

eProsima · Fast DDSversion=0 <2.6.11; version=3.0.0 <3.3.1; version=3.4.0 <3.4.1

Published CVSS scores

9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.2GitHubCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U
9.6GitHubCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/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.

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No observations available

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

Weakness, pattern, technique

CWE-131Incorrect Calculation of Buffer Size
CWE-400Uncontrolled Resource Consumption
CWE-122Heap-based Buffer Overflow
T1499.004Application or System Exploitation

Public exploit references

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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