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  <title>Most recent entries from all</title>
  <updated>2026-10-09T15:16:55.437357+00:00</updated>
  <author>
    <name>Vulnerability-Lookup</name>
    <email>csirt@opendfir.org</email>
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  <subtitle>Contains only the most 10 recent entries.</subtitle>
  <entry>
    <id>https://cve.radiocsirt.org/vuln/bdu:2021-05134</id>
    <title>bdu:2021-05134</title>
    <updated>2026-10-09T15:16:55.441621+00:00</updated>
    <content>bdu:2021-05134</content>
    <link href="https://cve.radiocsirt.org/vuln/bdu:2021-05134"/>
  </entry>
  <entry>
    <id>https://cve.radiocsirt.org/vuln/cisco-sa-iosxe-h323alg-bypass-4vy2mp2q</id>
    <title>cisco-sa-iosxe-h323alg-bypass-4vy2MP2Q — Cisco IOS XE Software H.323 Application Level Gateway Bypass Vulnerability</title>
    <updated>2026-10-09T15:16:55.441656+00:00</updated>
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        <p>A vulnerability in the H.323 application level gateway (ALG) used by the Network Address Translation (NAT) feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to bypass the ALG.

This vulnerability is due to insufficient data validation of traffic that is traversing the ALG. An attacker could exploit this vulnerability by sending crafted traffic to a targeted device. A successful exploit could allow the attacker to bypass the ALG and open connections that should not be allowed to a remote device located behind the ALG.

Note: This vulnerability has been publicly discussed as NAT Slipstreaming ["https://samy.pl/slipstream/"].

Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.



This advisory is part of the September 2021 release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: September 2021 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication. ["https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-74581"]</p>
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    </content>
    <link href="https://cve.radiocsirt.org/vuln/cisco-sa-iosxe-h323alg-bypass-4vy2mp2q"/>
  </entry>
  <entry>
    <id>https://cve.radiocsirt.org/vuln/euvd-2026-200118</id>
    <title>EUVD-2026-200118</title>
    <updated>2026-10-09T15:16:55.441695+00:00</updated>
    <content>EUVD-2026-200118</content>
    <link href="https://cve.radiocsirt.org/vuln/euvd-2026-200118"/>
  </entry>
  <entry>
    <id>https://cve.radiocsirt.org/vuln/fkie_cve-2021-1616</id>
    <title>fkie_cve-2021-1616</title>
    <updated>2026-10-09T15:16:55.441709+00:00</updated>
    <content type="xhtml">
      <div xmlns="http://www.w3.org/1999/xhtml">
        <p>A vulnerability in the H.323 application level gateway (ALG) used by the Network Address Translation (NAT) feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to bypass the ALG. This vulnerability is due to insufficient data validation of traffic that is traversing the ALG. An attacker could exploit this vulnerability by sending crafted traffic to a targeted device. A successful exploit could allow the attacker to bypass the ALG and open connections that should not be allowed to a remote device located behind the ALG. Note: This vulnerability has been publicly discussed as NAT Slipstreaming.</p>
      </div>
    </content>
    <link href="https://cve.radiocsirt.org/vuln/fkie_cve-2021-1616"/>
  </entry>
  <entry>
    <id>https://cve.radiocsirt.org/vuln/ghsa-gh89-2x3x-p7j7</id>
    <title>GHSA-gh89-2x3x-p7j7</title>
    <updated>2026-10-09T15:16:55.441733+00:00</updated>
    <content type="xhtml">
      <div xmlns="http://www.w3.org/1999/xhtml">
        <p>A vulnerability in the H.323 application level gateway (ALG) used by the Network Address Translation (NAT) feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to bypass the ALG. This vulnerability is due to insufficient data validation of traffic that is traversing the ALG. An attacker could exploit this vulnerability by sending crafted traffic to a targeted device. A successful exploit could allow the attacker to bypass the ALG and open connections that should not be allowed to a remote device located behind the ALG. Note: This vulnerability has been publicly discussed as NAT Slipstreaming.</p>
      </div>
    </content>
    <link href="https://cve.radiocsirt.org/vuln/ghsa-gh89-2x3x-p7j7"/>
  </entry>
  <entry>
    <id>https://cve.radiocsirt.org/vuln/gsd-2021-1616</id>
    <title>gsd-2021-1616</title>
    <updated>2026-10-09T15:16:55.441750+00:00</updated>
    <content>gsd-2021-1616</content>
    <link href="https://cve.radiocsirt.org/vuln/gsd-2021-1616"/>
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