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CVE-2015-3963· NVD / CVE Program· CNA icscert

Wind River VxWorks before 5.5.1, 6.5.x through 6.7.x before 6.7.1.1, 6.8.x before 6.8.3, 6.9.x before 6.9.4.4, and 7.x before 7 ipnet_coreip

Wind River VxWorks before 5.5.1, 6.5.x through 6.7.x before 6.7.1.1, 6.8.x before 6.8.3, 6.9.x before 6.9.4.4, and 7.x before 7 ipnet_coreip 1.2.2.0, as used on Schneider Electric SAGE RTU devices before J2 and other devices, does not properly generate TCP initial sequence number (ISN) values, which makes it easier for remote attackers to spoof TCP sessions by predicting an ISN value.

MediumCVSS 5.8 · v2.0—No exploit No fix recorded
Published
Aug 3, 2015
Updated
Jun 16, 2026
EPSS
3.7% · 89th percentile
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Report tools

JSON

Action score

24

Monitor

Low priority for now.

CVSS
23 / 40 · 5.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 3.7%

Affected systems

VendorProduct
windrivervxworks
schneider-electricsage 1210
schneider-electricsage 1230
schneider-electricsage 1250
schneider-electricsage 1310
schneider-electricsage 1330
schneider-electricsage 1350
schneider-electricsage 1410
schneider-electricsage 1430
schneider-electricsage 1450
schneider-electricsage 2200
schneider-electricsage 2400

and 2 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • windriver vxworks6.5 and later · up to 6.6 inclusive
  • windriver vxworks6.7 and later · before 6.7.1.1
  • windriver vxworks6.8 and later · before 6.8.3
  • windriver vxworks6.9 and later · before 6.9.4.4
  • windriver vxworks6.6.3
  • windriver vxworks6.6.4
  • windriver vxworks6.6.4.1
  • windriver vxworks7.0

Same product

windriver: all records

Other highest-scoring records for the same primary product.

  • CVE-2019-12255Wind River VxWorks has a Buffer Overflow in the TCP component (issue 1 of 4).
    62This week
  • CVE-2019-12257Wind River VxWorks 6.6 through 6.9 has a Buffer Overflow in the DHCP client component.
    60This week
  • CVE-2019-12256Wind River VxWorks 6.9 and vx7 has a Buffer Overflow in the IPv4 component.
    47Plan
  • CVE-2019-12260Wind River VxWorks 6.9 and vx7 has a Buffer Overflow in the TCP component (issue 2 of 4).
    46Plan
  • CVE-2019-12261Wind River VxWorks 6.7 though 6.9 and vx7 has a Buffer Overflow in the TCP component (issue 3 of 4).
    42Plan
  • CVE-2013-0714IPSSH (aka the SSH server) in Wind River VxWorks 6.5 through 6.9 allows remote attackers to execute arbitrary code or cause a denial of serv
    42Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

    If successful

    Confidentiality
    none
    Integrity
    P · data or configuration can be modified
    Availability
    P · the service can be disrupted
    Attack complexity
    M
    Confidentiality impact
    None
    Integrity impact
    P
    Availability impact
    P

    Weakness class (CWE)

    CWE-330 · Use of Insufficiently Random Values

    CVSS vector

    AV:N/AC:M/Au:N/C:N/I:P/A:P

    nvd-primary

    Attack context

    MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

    Noroxi analysis

    No Noroxi analysis for this record yet

    We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

    We use this product, ask for help

    Change log

    No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

    References

    Vendor advisories and official records. Exploit/PoC links are deliberately left out.

    All records