CVE-2021-44623Public exploitNetwork attack vector

Memory corruption via password verification request

Published Mar 9, 2022 · Updated Aug 4, 2024

Buffer overflow in TP-LINK WR-886N firmware 20190826 2.3.8 allows remote attackers to corrupt memory through a router API request. Public records identify /cloud_config/router_post/check_reset_pwd_verify_code but do not disclose the affected buffer, input field, or unsafe operation. The interface is reachable over the network without authentication; consequences beyond memory corruption are not publicly demonstrated.

CVSS severity9.8
Critical
EPSS probability1.78%
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 WR-886N firmware 20190826 2.3.8 allows remote attackers to corrupt memory through a router API request. Public records identify /cloud_config/router_post/check_reset_pwd_verify_code but do not disclose the affected buffer, input field, or unsafe operation. The interface is reachable over the network without authentication; consequences beyond memory corruption are not publicly demonstrated.

The record

CVE
CVE-2021-44623
Published
Mar 9, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 9, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record 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 National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10.0NIST National Vulnerability DatabaseAV:N/AC:L/Au:N/C:C/I:C/A:C

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')

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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