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CVE-2020-1649

19
FAUCET Score

CVE-2020-1649 affects Juniper Networks Junos OS devices equipped with specific MPC line cards configured for inline IP reassembly. An attacker can trigger a Denial of Service (DoS) by sending small, unreassembled fragmented packets, causing the Packet Forwarding Engine (PFE) to repeatedly disable. This vulnerability has a CVSS score of 7.5 (High), indicating it can be exploited remotely with low complexity to achieve a high impact on availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
17.2CPE matchmatch criteria
cpe:2.3:o:juniper:junos:17.2:-:*:*:*:*:*:*
17.2CPE matchmatch criteria
cpe:2.3:o:juniper:junos:17.2:r1:*:*:*:*:*:*
17.2CPE matchmatch criteria
cpe:2.3:o:juniper:junos:17.2:r1-s1:*:*:*:*:*:*
17.2CPE matchmatch criteria
cpe:2.3:o:juniper:junos:17.2:r1-s2:*:*:*:*:*:*
17.2CPE matchmatch criteria
cpe:2.3:o:juniper:junos:17.2:r1-s3:*:*:*:*:*:*

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
1.07%
Probability of exploitation in next 30 days
EPSS Percentile
61.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0107 is in the 39th percentile among its peer group of 51,553 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 / JSA11036
Vendor Advisory
juniper.net / documentation/en_US/junos/topics/topic-map/l2tp-lns-inline-service-interfaces.html
Vendor Advisory