rsyslog up to 8.1908.0 mmpstrucdata stack-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k5.82

Summaryinfo

A vulnerability has been found in rsyslog and classified as critical. Affected by this issue is the function mmpstrucdata. The manipulation leads to stack-based overflow. This vulnerability is documented as CVE-2026-61548. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in rsyslog and classified as critical. This issue affects the function mmpstrucdata. The manipulation with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). Impacted is confidentiality, integrity, and availability.

It is possible to read the advisory at seclists.org. The identification of this vulnerability is CVE-2026-61548. The exploitation is known to be easy. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 8.2606.0 eliminates this vulnerability.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: rsyslog 8.2606.0

Timelineinfo

07/26/2026 Advisory disclosed
07/26/2026 +0 days VulDB entry created
07/26/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: seclists.org
Status: Confirmed

CVE: CVE-2026-61548 (🔒)
GCVE (CVE): GCVE-0-2026-61548
GCVE (VulDB): GCVE-100-383351

Entryinfo

Created: 07/26/2026 18:30
Changes: 07/26/2026 18:30 (53)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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