CVE-2026-7668Public exploitNetwork attack vector

Pre-authentication memory disclosure via unterminated SCEP attributes

Published May 2, 2026 · Updated May 2, 2026

Out-of-bounds read in MikroTik RouterOS 6.49.8 allows remote attackers to disclose memory through an enabled SCEP endpoint. The scep.p parser returns raw ASN1_STRING_data pointers without preserving ASN.1 lengths, then treats transactionID and messageType as NUL-terminated strings before signature verification. An attacker must reach a configured SCEP endpoint; crafted PKIOperation attributes can leak adjacent memory in certRep replies and cause abnormal parsing.

CVSS severity7.3
High
EPSS probability0.30%
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 read in MikroTik RouterOS 6.49.8 allows remote attackers to disclose memory through an enabled SCEP endpoint. The scep.p parser returns raw ASN1_STRING_data pointers without preserving ASN.1 lengths, then treats transactionID and messageType as NUL-terminated strings before signature verification. An attacker must reach a configured SCEP endpoint; crafted PKIOperation attributes can leak adjacent memory in certRep replies and cause abnormal parsing.

The record

CVE
CVE-2026-7668
Published
May 2, 2026
Updated
May 2, 2026
Vendor
MikroTik
Product
RouterOS
Classifications
CWE-125, CWE-119, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 2, 2026CVE publishedPublication date reported by the CVE source.
  2. May 2, 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=6.49.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MikroTik · RouterOSversion=6.49.8

Published CVSS scores

5.5VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
7.5VulDBAV:N/AC:L/Au:N/C:P/I:P/A:P
7.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-125Out-of-bounds Read
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1190Exploit Public-Facing Application

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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