CVE-2022-46551Public exploitNetwork attack vector

Remote service interruption via unbounded time parsing

Published Dec 20, 2022 · Updated Apr 16, 2025

Buffer overflow in Tenda F1203 firmware 2.0.1.6 allows remote attackers to interrupt service via a crafted time parameter. The saveParentControlInfo handler uses sscanf with unbounded %[^-] and %s conversions to write the supplied value into two 32-byte stack buffers. The published request includes an admin cookie, while the authoritative CVSS assessment requires no privileges; the demonstrated consequence is denial of service.

CVSS severity7.5
High
EPSS probability0.81%
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 Tenda F1203 firmware 2.0.1.6 allows remote attackers to interrupt service via a crafted time parameter. The saveParentControlInfo handler uses sscanf with unbounded %[^-] and %s conversions to write the supplied value into two 32-byte stack buffers. The published request includes an admin cookie, while the authoritative CVSS assessment requires no privileges; the demonstrated consequence is denial of service.

The record

CVE
CVE-2022-46551
Published
Dec 20, 2022
Updated
Apr 16, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 20, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 16, 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

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5NIST NVDCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1499.004Application 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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