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CVE-2002-20001

38
FAUCET Score

CVE-2002-20001 describes a denial-of-service vulnerability, dubbed D(HE)at or D(HE)ater, affecting products from vendors like Balasys, F5, HPE, Siemens, Stormshield, and SUSE. This flaw allows a remote attacker to trigger expensive Diffie-Hellman Key Exchange (DHE) modular-exponentiation calculations on a vulnerable server by sending arbitrary, non-public key values. The attack is rated High severity (CVSS 7.5) due to its network-based vector, low attack complexity, and high impact on availability, requiring minimal client resources. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:balasys:dheater:-:*:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:siemens:scalance_w1750d_firmware:*:*:*:*:*:*:*:*
11CPE matchmatch criteria
cpe:2.3:o:suse:linux_enterprise_server:11:-:*:*:*:*:*:*
12CPE matchmatch criteria
cpe:2.3:o:suse:linux_enterprise_server:12:-:*:*:*:*:*:*
15CPE matchmatch criteria
cpe:2.3:o:suse:linux_enterprise_server:15:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
23.06%
Probability of exploitation in next 30 days
EPSS Percentile
97.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.2306 is in the 96th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cert-portal.siemens.com / productcert/pdf/ssa-506569.pdf
Third Party Advisory
dheatattack.com
Third Party Advisory
dheatattack.gitlab.io
Third Party Advisory
github.com / Balasys/dheater
ProductThird Party Advisory
github.com / mozilla/ssl-config-generator/issues/162
Issue Tracking
gitlab.com / dheatattack/dheater
Third Party Advisory
ieeexplore.ieee.org / document/10374117
Technical DescriptionThird Party Advisory
support.f5.com / csp/article/K83120834
Third Party Advisory
arubanetworks.com / assets/alert/ARUBA-PSA-2022-004.txt
Technical DescriptionThird Party Advisory
openssl.org / blog/blog/2022/10/21/tls-groups-configuration
Third Party Advisory
reddit.com / r/netsec/comments/qdoosy/server_overload_by_enforcing_dhe_key_exchange
Issue Tracking
researchgate.net / profile/Anton-Stiglic-2/publication/2401745_Security_Issues_in_the_Diffie-Hellman_Key_Agreement_Protocol
ExploitTechnical Description
suse.com / support/kb/doc
Third Party Advisory