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CVE-2025-30657

17
FAUCET Score

CVE-2025-30657 is an Improper Encoding or Escaping of Output vulnerability in Juniper Networks Junos OS, specifically affecting the Sampling Route Record Daemon (SRRD) in various versions prior to their latest updates. An unauthenticated, network-based attacker can exploit this by sending a specially crafted BGP update message, causing the SRRD to crash and temporarily interrupt jflow processing, though traffic forwarding remains unaffected. With a CVSS score of 5.3 (Medium), this vulnerability has a low impact on availability and requires no user interaction. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 21.2CPE matchmatch criteria
cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*
21.2CPE matchmatch criteria
cpe:2.3:o:juniper:junos:21.2:-:*:*:*:*:*:*
21.2CPE matchmatch criteria
cpe:2.3:o:juniper:junos:21.2:r1:*:*:*:*:*:*
21.2CPE matchmatch criteria
cpe:2.3:o:juniper:junos:21.2:r1-s1:*:*:*:*:*:*
21.2CPE matchmatch criteria
cpe:2.3:o:juniper:junos:21.2:r1-s2:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

6.9MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:A/V:X/RE:M/U:X

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
VS Confidentiality
NONE
VS Integrity
NONE
VS Availability
LOW
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.38%
Probability of exploitation in next 30 days
EPSS Percentile
30.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0038 is in the 19th percentile among its peer group of 23,725 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Vendor Patches (1)

junipervendor investigatingvia vendor_rss
View patch

Vendor Advisories (1)

juniperjuniper:ka0Dp000000vDvNIAU

2025-04 Security Bulletin: Junos OS: Processing of a specific BGP update causes the SRRD process to crash (CVE-2025-30657)

Apr 9, 2026

References

supportportal.juniper.net / JSA96467
Vendor Advisory