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CVE-2013-4687

20
FAUCET Score

CVE-2013-4687 describes a denial-of-service vulnerability in Juniper Junos on SRX devices, specifically affecting versions 10.4, 11.2, 11.4, and 12.1. Remote attackers can crash the flowd daemon by sending crafted TCP packets when certain Application Layer Gateways (ALGs) are enabled. This vulnerability has a CVSS score of 7.8, indicating high severity. It is easily exploitable over the network (AV:N/AC:L) and can lead to a complete denial of service (A:C) without requiring authentication. There is no evidence of active exploitation, and no public exploit code (Metasploit, Nuclei, ExploitDB) is available. Community discussion and media coverage for this CVE are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
10.4CPE matchmatch criteria
cpe:2.3:o:juniper:junos:10.4:*:*:*:*:*:*:*
11.2CPE matchmatch criteria
cpe:2.3:o:juniper:junos:11.2:*:*:*:*:*:*:*
11.4CPE matchmatch criteria
cpe:2.3:o:juniper:junos:11.4:*:*:*:*:*:*:*
12.1CPE matchmatch criteria
cpe:2.3:o:juniper:junos:12.1:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:h:juniper:srx100:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.8HIGH

AV:N/AC:L/Au:N/C:N/I:N/A:C

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.61%
Probability of exploitation in next 30 days
EPSS Percentile
83.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0261 is in the 71st 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 / JSA10577
Vendor Advisory
securityfocus.com / bid/61122