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CVE-2020-1657

19
FAUCET Score

CVE-2020-1657 describes a Denial of Service (DoS) vulnerability in the key-management-daemon (kmd) of Juniper Networks Junos OS on SRX Series devices. An unauthenticated attacker can spoof packets to IPSec peers before a security association is established, preventing IPSec channel setup and causing a sustained DoS. This vulnerability has a CVSSv3 score of 7.5 (High), indicating a network-based attack with low complexity and high impact on availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
12.3x48CPE matchmatch criteria
cpe:2.3:o:juniper:junos:12.3x48:-:*:*:*:*:*:*
12.3x48CPE matchmatch criteria
cpe:2.3:o:juniper:junos:12.3x48:d10:*:*:*:*:*:*
12.3x48CPE matchmatch criteria
cpe:2.3:o:juniper:junos:12.3x48:d15:*:*:*:*:*:*
12.3x48CPE matchmatch criteria
cpe:2.3:o:juniper:junos:12.3x48:d20:*:*:*:*:*:*
12.3x48CPE matchmatch criteria
cpe:2.3:o:juniper:junos:12.3x48:d25:*:*:*:*:*:*

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
1.29%
Probability of exploitation in next 30 days
EPSS Percentile
67.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0129 is in the 47th percentile among its peer group of 51,485 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

Vendor Patches (1)

junipervendor investigatingvia nvd_reference
View patch

References

kb.juniper.net / JSA11050
Vendor Advisory