Critical 9.8Published Nov 9, 2009

CVE-2009-3555The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft Internet Information Services (IIS) 7.0, mod_ssl in the Apache HTTP Server 2.2.14 and earlier, OpenSSL before 0.9…

Updated under an hour ago (Nov 2, 2026, 12:20 AM ET)

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It affects apache http_server and 7 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft Internet Information Services (IIS) 7.0, mod_ssl in the Apache HTTP Server 2.2.14 and earlier, OpenSSL before 0.9.8l, GnuTLS 2.8.5 and earlier, Mozilla Network Security Services (NSS) 3.12.4 and earlier, multiple Cisco products, and other products, does not properly associate renegotiation handshakes with an existing connection, which allows man-in-the-middle attackers to insert data into HTTPS sessions, and possibly other types of sessions protected by TLS or SSL, by sending an unauthenticated request that is processed retroactively by a server in a post-renegotiation context, related to a "plaintext injection" attack, aka the "Project Mogul" issue.

CVSS: 9.8 CRITICAL (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-295, CWE-300
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

apache http_server apache:http_server	through 2.2.14	NVD
gnu gnutls gnu:gnutls	through 2.8.5	NVD
mozilla nss mozilla:nss	through 3.12.4	NVD
openssl openssl openssl:openssl	through 0.9.8k; 1.0	NVD
canonical ubuntu_linux canonical:ubuntu_linux	8.04; 8.10; 9.04; 9.10; 10.04; 10.10	NVD
debian debian_linux debian:debian_linux	4.0; 5.0; 6.0; 7.0; 8.0	NVD
fedoraproject fedora fedoraproject:fedora	11; 12; 13; 14	NVD
f5 nginx f5:nginx	from 0.1.0 through 0.8.22	NVD

References

References

http://archives.neohapsis.com/archives/bugtraq/2013-11/0120.html	broken-link
http://blog.g-sec.lu/2009/11/tls-sslv3-renegotiation-vulnerability.html	third-party-advisory
http://blogs.iss.net/archive/sslmitmiscsrf.html	broken-link
http://blogs.sun.com/security/entry/vulnerability_in_tls_protocol_during	third-party-advisory
http://clicky.me/tlsvuln	exploit, third-party-advisory
http://extendedsubset.com/?p=8	broken-link
http://extendedsubset.com/Renegotiating_TLS.pdf	broken-link
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c01945686	broken-link
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c02436041	broken-link
http://itrc.hp.com/service/cki/docDisplay.do?docId=emr_na-c02273751	broken-link
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.