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CVE-2019-9898

25
FAUCET Score

CVE-2019-9898 describes a critical vulnerability in PuTTY versions prior to 0.71, where cryptographic random numbers could be recycled, impacting the security of Debian, Fedora, NetApp, OpenSUSE, and PuTTY itself. With a CVSS score of 9.8 (CRITICAL), this flaw is easily exploitable over the network with low complexity, potentially leading to complete compromise of confidentiality, integrity, and availability. While the vulnerability is severe, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.71CPE matchmatch criteria
cpe:2.3:a:putty:putty:*:*:*:*:*:*:*:*
28CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:28:*:*:*:*:*:*:*
29CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.94%
Probability of exploitation in next 30 days
EPSS Percentile
89.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0394 is in the 82nd percentile among its peer group of 36,897 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

lists.opensuse.org / opensuse-security-announce/2019-04/msg00004.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2019-04/msg00020.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2019/04/msg00023.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/36LWQ3NPFIV7DC7TC4KFPRYRH2OR7SZ2
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/LDO3F267P347E6U2IILFCYW7JPTLCCES
seclists.org / bugtraq/2019/Apr/6
Mailing ListThird Party Advisory
security.netapp.com / advisory/ntap-20190329-0002
Broken Link
security.netapp.com / advisory/ntap-20190401-0002
PatchThird Party Advisory
chiark.greenend.org.uk / ~sgtatham/putty/changes.html
Third Party Advisory
debian.org / security/2019/dsa-4423
Third Party Advisory
securityfocus.com / bid/107523
Third Party AdvisoryVDB Entry