CVE-2022-33087Public exploitNetwork attack vector

Router crash via unchecked HTTP parameter copy

Published Jun 30, 2022 · Updated Aug 3, 2024

Stack overflow in TP-Link Archer C50 and Archer A5 V5 firmware 200407 allows remote attackers to crash the router via crafted HTTP requests. The DM_fillobjbystr function in libcmm.so uses strncpy to copy an unchecked, attacker-controlled value into a 1,304-byte stack buffer. No account or user interaction is required, and an oversized management request crashes the affected process and interrupts router service.

CVSS severity7.5
High
EPSS probability1.62%
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 TP-Link Archer C50 and Archer A5 V5 firmware 200407 allows remote attackers to crash the router via crafted HTTP requests. The DM_fillobjbystr function in libcmm.so uses strncpy to copy an unchecked, attacker-controlled value into a 1,304-byte stack buffer. No account or user interaction is required, and an oversized management request crashes the affected process and interrupts router service.

The record

CVE
CVE-2022-33087
Published
Jun 30, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 30, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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

7.8NIST National Vulnerability DatabaseAV:N/AC:L/Au:N/C:N/I:N/A:C
7.5NIST National Vulnerability DatabaseCVSS: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-787Out-of-bounds Write
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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