CVE-2023-30307Public exploit

TCP session termination via forged NAT remapping

Published May 28, 2024 · Updated Mar 27, 2025

TCP session hijacking in affected TP-Link routers allows attackers on the same Wi-Fi network to terminate active TCP connections. The routers preserve NAT source ports, accept spoofed reverse-path packets, and omit TCP-window validation, letting forged resets replace a victim's NAT mapping. An off-path client sharing the network can then learn sequence numbers and reset, reroute, or inject into the connection; encryption limits content poisoning.

CVSS severity5.3
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

TCP session hijacking in affected TP-Link routers allows attackers on the same Wi-Fi network to terminate active TCP connections. The routers preserve NAT source ports, accept spoofed reverse-path packets, and omit TCP-window validation, letting forged resets replace a victim's NAT mapping. An off-path client sharing the network can then learn sequence numbers and reset, reroute, or inject into the connection; encryption limits content poisoning.

The record

CVE
CVE-2023-30307
Published
May 28, 2024
Updated
Mar 27, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-384, T1499
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 28, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 27, 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 vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-384Session Fixation
T1499Endpoint Denial of Service

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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