CVE-2023-34832Public exploitNetwork attack vector

Unauthenticated memory corruption via unbounded IPv6 prefix formatting

Published Jun 16, 2023 · Updated Jul 9, 2026

Buffer overflow in TP-Link Archer AX10(EU) V1.2_230220 firmware allows remote attackers to corrupt memory via a crafted IPv6 prefix. FUN_131e8 passes that prefix to sprintf, which writes a formatted URL into the fixed-size local_428 buffer without a length limit. No authentication or user interaction is required; memory corruption is established, while successful code execution is not publicly demonstrated.

CVSS severity9.8
Critical
EPSS probability1.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in TP-Link Archer AX10(EU) V1.2_230220 firmware allows remote attackers to corrupt memory via a crafted IPv6 prefix. FUN_131e8 passes that prefix to sprintf, which writes a formatted URL into the fixed-size local_428 buffer without a length limit. No authentication or user interaction is required; memory corruption is established, while successful code execution is not publicly demonstrated.

The record

CVE
CVE-2023-34832
Published
Jun 16, 2023
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 16, 2023CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 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

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
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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