CVE-2023-30383Network attack vector

Unauthenticated router crash via EOAccumulator overflow

Published Jul 18, 2023 · Updated Jul 9, 2026

Buffer overflow in TP-Link Archer C20, C50, and C2 firmware builds 150707, 160801, and 170228 allows remote attackers to crash routers. The EOAccumulator parser copies crafted input into a fixed-size buffer without verifying its length. No authentication or user interaction is required; successful exploitation interrupts routing service, with no reported data disclosure or modification.

CVSS severity7.5
High
EPSS probability1.35%
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 C20, C50, and C2 firmware builds 150707, 160801, and 170228 allows remote attackers to crash routers. The EOAccumulator parser copies crafted input into a fixed-size buffer without verifying its length. No authentication or user interaction is required; successful exploitation interrupts routing service, with no reported data disclosure or modification.

The record

CVE
CVE-2023-30383
Published
Jul 18, 2023
Updated
Jul 9, 2026
Vendor
TP-Link
Product
Archer C20
Classifications
CWE-120, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 18, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=v1_150707

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

TP-Link · Archer C20version=v1_150707
TP-Link · Archer C50version=v2_160801
TP-Link · Archer C2version=v1_170228

Published CVSS scores

7.5NVDCVSS: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 exploitUnconfirmed

Weakness, pattern, technique

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

Public exploit references

No public exploit references are available in this record.

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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