CVE-2023-33669Public exploitNetwork attack vector

Unauthenticated memory corruption via timeZone overflow

Published Jun 2, 2023 · Updated Jan 8, 2025

Stack overflow in Tenda AC8 V4.0 firmware 16.03.34.06 allows remote attackers to corrupt memory via the timeZone parameter. The sub_44db3c function processes the attacker-controlled value without sufficient bounds enforcement, overflowing its stack storage. No authentication or user interaction is required; the resulting stack corruption can crash the service or redirect program control.

CVSS severity9.8
Critical
EPSS probability2.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack overflow in Tenda AC8 V4.0 firmware 16.03.34.06 allows remote attackers to corrupt memory via the timeZone parameter. The sub_44db3c function processes the attacker-controlled value without sufficient bounds enforcement, overflowing its stack storage. No authentication or user interaction is required; the resulting stack corruption can crash the service or redirect program control.

The record

CVE
CVE-2023-33669
Published
Jun 2, 2023
Updated
Jan 8, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 2, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 8, 2025Record 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

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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-787Out-of-bounds Write
T1210Exploitation of Remote Services

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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