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CVE-2019-0053

26
FAUCET Score

CVE-2019-0053 describes a stack-based buffer overflow vulnerability in the telnet client of Juniper Networks Junos OS, affecting various versions. This flaw, stemming from insufficient validation of environment variables, can be exploited to bypass veriexec restrictions. The vulnerability has a CVSS score of 7.8 (High), indicating a local attack vector with low complexity, potentially leading to high impact on confidentiality, integrity, and availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
12.3CPE matchmatch criteria
cpe:2.3:o:juniper:junos:12.3:-:*:*:*:*:*:*
12.3CPE matchmatch criteria
cpe:2.3:o:juniper:junos:12.3:r1:*:*:*:*:*:*
12.3CPE matchmatch criteria
cpe:2.3:o:juniper:junos:12.3:r11:*:*:*:*:*:*
12.3CPE matchmatch criteria
cpe:2.3:o:juniper:junos:12.3:r12:*:*:*:*:*:*
12.3CPE matchmatch criteria
cpe:2.3:o:juniper:junos:12.3:r13:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.59%
Probability of exploitation in next 30 days
EPSS Percentile
44.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0059 is in the 83rd percentile among its peer group of 17,070 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 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

Vendor Patches (1)

junipervendor investigatingvia nvd_reference
View patch

References

packetstormsecurity.com / files/153746/FreeBSD-Security-Advisory-FreeBSD-SA-19-12.telnet.html
Third Party AdvisoryVDB Entry
kb.juniper.net / JSA10947
Vendor Advisory
lists.debian.org / debian-lts-announce/2022/11/msg00033.html
Issue TrackingThird Party Advisory
lists.debian.org / debian-lts-announce/2023/10/msg00013.html
seclists.org / bugtraq/2019/Jul/45
Mailing ListThird Party Advisory
security.freebsd.org / advisories/FreeBSD-SA-19:12.telnet.asc
Third Party Advisory
exploit-db.com / exploits/45982
ExploitThird Party AdvisoryVDB Entry