CVE-2026-26514Public exploitNetwork attack vector

Unauthenticated service interruption via traceroute flag injection

Published Mar 4, 2026 · Updated Mar 4, 2026

Argument injection in bird-lg-go before 1.4.1 allows remote attackers to interrupt service through crafted traceroute requests. The traceroute handler parses the q parameter with shlex.Split and appends every resulting token as a command argument without restricting flags. No authentication is required; injected -w, -q, and -m options can keep unreachable-target probes running until concurrent processes exhaust PID or memory resources.

CVSS severity7.5
High
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Argument injection in bird-lg-go before 1.4.1 allows remote attackers to interrupt service through crafted traceroute requests. The traceroute handler parses the q parameter with shlex.Split and appends every resulting token as a command argument without restricting flags. No authentication is required; injected -w, -q, and -m options can keep unreachable-target probes running until concurrent processes exhaust PID or memory resources.

The record

CVE
CVE-2026-26514
Published
Mar 4, 2026
Updated
Mar 4, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-88, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 4, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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.

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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-88Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
T1499.004Endpoint Denial of Service: Application 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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